We specialize in the complete maintenance and repair of all foreign and domestic vehicles for your family or business.  We are full service repair facilities serving the Greater Baltimore, Arbutus, Halethorpe, Elkridge, Lithicum, Catonsville, & Lithicum Heights area with auto repair, fleet repair, and diesel truck repairs; utilizing the latest diagnostic equipment and computerized repair manuals to ensure your specific vehicle is maintained and repaired to the latest factory specifications.  Our ASE certified technicians are fully trained and work hard to get you back on the road quickly.  For all of your auto repair needs, depend on us to keep you on the road.  


jasper logo associate ownedJASPER ENGINES AND TRANSMISSIONS INSTALLER   We proudly recommend JASPER who has been the industry leader since 1942 for our vehicle engine, transmission & differential repairs. Why JASPER?

1. PROVEN, Industry leader since 1942 with engines and transmissions throughout the USA.  Pioneering 75 years of leadership in the automotive remanufacturing industry.
2. QUALITY,  JASPER remanufactured products exceed factory specifications and improve OEM inherent design flaws with updated parts and precise machining.  
3. TESTED, Live run computer assisted testing to assure trouble free performance and peace of mind for the automotive customer who depends on it.  


Your brake system is comprised of a long list of parts, and all of them are under a great deal of stress. The task of stopping a car, truck, or SUV which weighs thousands of pounds is certainly no easy one. Learn how to spot a brake issue, and know what to do about it, with Security Auto & Truck, Inc in Halethorpe.

Brake problems come in a variety of forms. Worn brake pads cause squeaking or grinding noises, especially when the brakes are applied, but sometimes constantly. Typically, the sound will vary with the speed of your car, and braking will alter the noise you hear.

Bad brakes affect performance too. If you feel like you have to hit the pedal harder than normal to stop your vehicle, the brakes feel weak, or your car pulls to one side whenever you depress the pedal, you likely have a malfunctioning master cylinder, sticking brake caliper, or collapsed hoses. Symptoms may be erratic, sometimes only popping up occasionally, but should not be ignored.

Warped or worn rotors damaged by high heat or worn brake pads will cause your car to pulse or vibrate whenever you hit the brakes. This can be damaging to other components, decrease brake performance, and is generally annoying.

If you are having brake problems, get them fixed. Faulty brake equipment is irritating, dangerous, and stressful, and will only worsen if neglected. If you are experiencing any of the above problems, or your vehicle needs any other repair or maintenance, don’t hesitate to call or come by Security Auto & Truck, Inc. Our mechanics have the knowledge and ability necessary to get your vehicle repaired quickly, correctly, and efficiently. Whether you need a tune-up or an entire overhaul, our technicians will get you there.

Your vehicle’s HVAC system is important...not only for comfort, but for defrosting and defogging windows, uninterrupted flow of engine coolant, and proper operation of belts which drive your alternator, power steering, and water pump. Heating and cooling issues come in a variety of shapes and sizes, but Security Auto & Truck, Inc in Halethorpe can handle them all.

Your A/C system is complicated, to say the least. Compressors, high pressure lines, special gasses, condensers, actuators, electronic and vacuum signals, and multiple other aspects of your car’s air conditioning system all have to work together in harmony to effectively cool your vehicle. While air conditioning is something you can generally live without, it’s definitely nice to have, and typically a small fix can get your system back up and running. The longer an A/C system remains unoperational, the more problems it will develop, so it’s a good idea to have it serviced regularly.

Heating systems are generally far more reliable than A/C, since they primarily operate on circulating engine coolant. However, if you’re having heating issues, the consequences are usually far greater if neglected. Lack of defrosting and defogging ability is inconvenient and unsafe. A clogged heater core can cause engine overheating, and a failed heater core will leak coolant into your vehicle, damaging other components. If your heater is misbehaving, have it inspected immediately. Often a simple coolant flush will correct the issue.

When you bring your vehicle to the ASE certified automotive specialists of Security Auto & Truck, Inc in Halethorpe for an HVAC check or a repair of your air conditioning, heating, and ventilation system, our highly trained technicians may perform any of the following services:

  • Air conditioning performance test
  • Radiator cooling fan and condenser check
  • Thorough inspection and repair and replacement of HVAC components due to leaks degraded seals and malfunctions including hoses, gaskets, and belts
  • System pressure checks, such as with hi and low-pressure hoses
  • Air conditioning recharge
  • Refrigerant refill
  • Replacement or cleaning of cabin air filter
  • Condenser repair and replacement
  • Compressor repair and replacement
  • Evaporator repair and replacement
  • Accumulator/receiver-drier repair and replacement
  • Radiator repair and replacement
  • Thermostat repair and replacement
  • Water pump repair and replacement

Regular and preventative maintenance HVAC services will ensure you avoid many of the preventable extensive repairs that arise from failure to properly maintain your vehicle’s air conditioning, heating, and ventilation system. If you have noticed exterior or interior leaks, odd smells or a failure to maintain cabin temperature, our technicians are qualified and prepared to quickly diagnose any HVAC issues in your vehicle and efficiently complete any necessary maintenance or repair services to have you back on the road as soon as possible.

Whether you are experiencing heating or cooling difficulties, or you simply want to keep your system maintained, our experienced mechanics at Security Auto & Truck, Inc have you covered. Whether your car, truck, or SUV needs a coolant flush, an A/C system flush or charge, actuator replacement, or any other sort of repair or maintenance, come see us today here in Halethorpe to drivein comfort again.

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It’s time to retire your old engine, or you may be looking to boost your vehicle’s performance. Either way, you need a high-performance engine installed, and you need it done right. From bolt in crate engines to professionally modified motors, Security Auto & Truck, Inc in Halethorpe has a team of expert mechanics you can trust to do the quality job you’re searching for. Performance engine builds and installation aren’t something you can just trust anyone to do right; you need technicians with knowledge, ability, and experience. Our team is up for the challenge, and can provide everything from professional advice, to installation, repair, and maintenance. We can even source an engine for you. If you’re ready to breathe new life into an old car, drop in and see us at Security Auto & Truck, Inc today.

Our automotive technicians know engines and they know performance here at Security Auto & Truck, Inc in Halethorpe, MD.  Put that performance engine experience to work on your project if you are looking to improve horsepower.  JASPER  Performance engines are the choice many performance drivers have under the hood.  Our engines will offer you the performance and dependability you are looking for! Engines that are ideal for street-rods, Corvettes, Camaros and other performance vehicles. You'll be amazed at what you can get for your money with a JASPER performance engine installed right here in our shop and backed by a warranty that is nationwide!

Download the performance brochure! Click Here

performancecrateClass 1 Engines for mild camshaft profiles and 10% more horsepower and torque than a stock engine.

Stock Performance Aggressive camshaft profile in comparison to Class 1 Engine with upgraded aftermarket cylinder heads.

Class II Engines Serious horsepower for specific applications with additional machining of castings and performance valves.  Matched high-tension valve springs and high-performance fasteners.



Our JASPER Performance engines offer a wide range of proven products and performance levels to meet your individual needs!

Match it with a Performance Transmission!

More performance than stock without radical shifting!  Heavy-duty lined clutch plates and intermediate sprag plus front band.  Competition shift kit and high-stall speed torque converter!   All backed with the JASPER WARRANTY - INSTALLED BY EXPERT TECHNICIANS you know and trust!  A full warranty disclosure is available at www.jasperengines.com or upon request.




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DIFFERENTIAL REPLACEMENT We install JASPER® Differentials which are completely remanufactured to meet or exceed OEM specifications with a 3 YEAR | 100,000 MILE nationwide parts & labor warranty remanufactured rear axle assemblies and differentials because every one of them goes through our extensive "Do It Right" process that ensures worry-free operation which is why we choose JASPER® Differentials every time here at our shop!

FLEET SERVICE PROGRAM   Our Fleet business customers get the highest priority to keep them on the road.

ase.badge.365ASE CERTIFIED TECHNICIANS,  Know the advantages of trusting only ASE Certified automotive technicians.

BG logo BG PRODUCTS  Lifetime Protection Plan Products & Services
Protect your vehicle for Life!

Complete Duramax Diesel Repairs Everything from standard service to major work.
Trust Security Auto & Truck, Inc to have the right training, diagnostic equipment and parts to get the job done right!

map logo MOTORIST ASSURANCE   Part of the Motorist Assurance Program to improve communications and our services for our customers.

Breaking down in your car, truck, or SUV is no fun; a break down in a motorhome can be a nightmare. At Security Auto & Truck, Inc in Halethorpe, we understand the importance of keeping your RV reliable and road ready at all times. Gas or diesel, big or small, we repair and maintain brake systems, engines, transmissions, tires, suspensions, pumps, and electronics. We provide engine diagnostics and inspections, too. The only way to deter a breakdown on the road is to keep your RV maintained, with quality replacement parts and professional mechanics. Don’t risk a detour on your next vacation; bring your RV to Security Auto & Truck, Inc for any and all of your repair and maintenance needs. Our team of professionals will do everything in our power to keep your RV reliably on the road, and your mind at ease en route to your next destination. Call or come by anytime.

Complete service includes:

Maintenance:  Oil Changes, Tire Rotations, Radiator Flush, Belts & Hoses, Batteries, and standard pre-trip checks
Service Repairs:  Computer Diagnostics, Brakes, & Full Repair 
Heavy Duty RV Service Repairs:  Clutch Repair & Replacement, Suspension Adjustment, Pump Replacement, Valve & Piston Maintenence, Diesel Engine Repair & Replacements
Emergency Repairs: Have an issue while traveling?  Count on our team to get you back on the road quickly and safely. 

We like to know of any issues you may experience while driving your RV and with standard maintenance and repairs taken care of there should be little to no issues at all.  To increase awareness, we decided to add a list of standard maintenance and upkeep tips for your RV/trailer here!  If you have any questions, simply stop by the shop or give us a call here at Security Auto & Truck, Inc in Halethorpe, MD!

rv service 1

Standard Maintenance Should Include:

Brakes: Your trailer brakes should be inspected and serviced annually or more often if you make substantial use of the trailer.
Ramp door: You should lubricate ramp door hinges with Lithium grease. Also, periodically lubricate the ramp door extension.
Huck bolts: Check the huck bolts periodically. If you detect a loose huck bolt fastener, do not tow the trailer. Call your dealer for instructions. Huck bolts are not end user serviceable.
Pre-Departure Maintenance  Going out RVing is a vacation and an adventure rolled into one so before going out, make an appointment to have your RV serviced.   This usually includes tire rotation, an oil change if necessary and an overall inspection of the vehicle for potential problems.
Lights, Fluids & Wipers: Your lights and wipers are not the first thing you think of before taking that RV trip, have our team make sure the engine is running smoothly by checking oil, brake fluid and transmission fluid to make sure they are filled. Once all fluid levels are fine, we check your lights and windshield wipers.  
Tire Safety  All your tires should be the same type, size, and construction—do not mix bias-belted and radial tires. In selecting tires, buy the size, type.  Our team will check to ensure you have the proper tire pressure and replace worn tires.

Tires  Periodic inspection and maintenance of motor coach and trailer tires and wheels are essential to towing safety, including spare tires. Proper tire pressure affects vehicle handling and the safety of your tires. You can find the correct tire pressure for your motor coach in the owner’s manual or on the tire information placard.
• Under inflation reduces the load-carrying capacity of your motor coach or trailer, may cause sway and control problems and may result in overheating, causing blowouts or other tire failure.
• Over inflation causes premature tire wear and affects the handling characteristics of the tow vehicle or trailer.

Wiring  Make sure connector-plug prongs and receptacles, light bulb sockets, wire splices, and ground connections are clean and shielded from moisture. Lightly coat all electrical terminal connections with non-conducting (dielectric), light waterproof grease.  Clean the prongs with very fine sandpaper, being careful not to damage the contact area.  Clean the surface deposits in the connector holes. (Make sure the lights are off to prevent blowing a fuse.) Try to clean off only the deposits and lubricate lightly with dielectric, light waterproof grease.

Your pre-trip planning should include the following: 

Inspecting your emergency equipment to make sure you have a fully-stocked first aid kit, a functioning fire extinguisher and an emergency kit that should at least include a tire pump, spare fuses, flashlight, multipurpose tool, pocket knife, road flares and some canvas work gloves. Be sure to inspect your spare tire and vehicle jack.

Check your trailer hitch: the nuts, bolts, and other fasteners to ensure that the hitch remains secured to the motor coach and the coupler remains secured to the trailer. The connection point may require periodic lubrication to permit free movement of the coupler to the hitch ball.

RV Camper repairs buton opt e1403730779128Some RV Ownership Tips

Our job at Security Auto & Truck, Inc in Halethorpe, MD is to help you travel safely and these RV tips we feel are a good way to help you with your RV ownership. 

Driving Your Motor coach  Driving a motor coach is easy to learn but it also comes with challenges as your RV is much bigger and handles differently.  The two most important differences come when turning and braking. Before taking your motor coach on the road, go to a large empty parking lot and practice your turns. Remember that your motor coach will need a wider turn radius than a car, so when making a turn pull out further into the intersection before beginning your turn. Motor coaches also need more room to slow down, so when driving on the highways always follow the speed limit and keep a good distance between yourself and the vehicles in front of you. When coming to an off ramp, slow down well before reaching it to avoid having to decelerate suddenly.

Going slow will also help when you run into bad weather. High winds will affect your motor coach more than it will a car. Keep a strong grip on your steering wheel and you should be okay. For rain or snow, you should decrees your speed. A vehicle like a motor coach is less prone to skidding than a car because of its lower center of gravity, but at the same time it is much harder to control if it goes into a skid.

Low bridges are another hazard of which you should be aware. Most bridges have their heights displayed to the drivers passing underneath them, so know the height of your motor coach before you get on the road.

Getting To Know Your LP System  The LP system on your motor coach is one of the most important systems on-board. While race season is primarily in the warm months and the furnace may not get much use, the LP system may also fuel the refrigerator, the range, the oven and the water heater. In fact, some of these appliances operate on both electricity and LP gas, allowing you to switch back and forth.

LP stands for liquefied petroleum gas and is also known as propane. The gas is sold in liquid form and kept in a storage tank beneath the coach is a special compartment. A panel, usually beneath the slide out, gives you full access to the tank. You coach may be equipped with a 60-lb./14-gallon tank. One pound of propane produces 36 cubic feet of gas. You can expect to use a couple of gallons of LP a week in warm weather and more if it’s cold and the furnace is operating. Keep track of the gauge to know when you are running low.

To refill the tank, simply drive your coach to any LP fuel site. Most gas stations have LP refilling stations; some departments stores may have LP tanks as well. A certified service representative must fill the tank. The tank is located outside the coach because the vapors are dangerous, if there is a leak. Never bring the LP containers inside the coach and do not store them in an unventilated area.

The appliances in your coach are equipped with electric ignitions. Generally, appliances that operate on both LP and electricity should be switched to electrical mode when traveling. This reduces the chances for an LP leak. Several of the appliances, automatically shift to the electrical mode when traveling.  All appliances in your coach are fully functional when you are traveling.

Winterizing Your Motor coach  When winter time comes around and camping season is over, what do you do with the motor coach? Just park it, right? Not so fast. You have some chores to do if you want to use your coach again in the spring. Exposing your coach to freezing weather without preparation can damage a number of systems, such as water lines, tanks and water heaters. And even if you live where cold temperatures are rare, your motor coach still needs attention. We recommend you follow these procedures for maintaining your motor coach or that you bring it to Security Auto & Truck, Inc in Halethorpe, MD for winterizing.  If you choose to do it yourself, these are some helpful tips.

• Begin by removing all food and beverages. This includes everything in the cabinets and the refrigerator — even that small jar of mustard in the back corner of the refrigerator. Anything you leave in the motor coach is subject to freezing or spoiling. Cleaning up an exploded can of Pepsi first thing in spring is not fun. And, food left in the coach can attract rodents and insects, giving you an even bigger headache when you open the coach for spring.
• This is also a good time to give the coach a complete cleaning inside and out. It’s a dirty job, but someone has to do it. Think of it this way: just as your engine needs regular maintenance, your coach needs regular cleaning.
• Drain thoroughly all water tanks, holding tanks, lines and pumps to prevent damage to the RV’s water system. Don’t drain the tanks onto your front lawn. It’s messy and unhealthy. Most campgrounds have dump stations you can use for a small fee. Also remember to drain the water heater and the toilet.
• Use a non-toxic RV anti-freeze to keep any remaining water from freezing in the system. You can find the anti-freeze at your RV supply store. Also, put some RV anti-freeze in each drain.
• Charge wet cell storage batteries to full electrical charge. This should protect them from freezing temperatures. A discharged battery can freeze and be damaged.
• Tape up all vents and openings, including vents for the furnace and range hood. This will keep mice and other little critters from gaining access to the unit.
• Cover the regulator on the propane cylinder and extinguish all pilot lights.
• You should keep your coach road-ready by running the engine for about 30 minutes each month. Driving the vehicle at highway speed once a month for at least 10 miles keeps the coach in good working order and protects the tires from non-use damage.
• Prepare your generator for winter storage by performing regular maintenance as recommended in your owner’s manual. Also, check the anti-freeze in the generator. As with the motor coach itself, you should exercise the generator on a regular basis by running it for 30 minutes to an hour each month.
Do not overlook the other elements in your coach, such as the appliances. These also have special storage instructions covered by their own service manuals.

Pay Close Attention to Loading Your RV - Motor Coach - Trailer  Your trailer is designed to haul all of your cars and gear, but you need to pay special attention to how you load it.  Generally, you should locate 70 percent of the cargo weight in front of the axle center line. This ensures there is sufficient weight on the trailer hitch and that the tow vehicle shares in carrying the cargo weight. If you have too much of the weight in the rear of the trailer, it can cause the trailer to fishtail when driving at highway speeds. Your trailer is designed so that when you load your cars, you place them correctly in the trailer. However, other equipment and parts you add can change the weight distribution. Make sure you stow heavier items toward the front of the trailer.

Also, make sure you tie down all equipment and vehicles, and don’t spare the money when investing in tie down straps. Use a strap that is rated at three times the weight of the item it secures. In a lock-up situation with the brakes, a car or anything else in the trailer can triple in weight.  Additionally, you need to stow all cargo or tie it down to prevent it from shifting during the trip. Evenly distribute all materials from side to side. Again, this prevents the trailer from fishtailing.  Some customers even install cameras inside the trailer so they can monitor the load, especially their vehicles, while they are driving.

If your trailer does begin to fishtail as you accelerate to highway speed, the best reaction is to take your foot off the accelerator and allow the vehicle to reduce speed. This should stop the fishtailing. If the oscillation resumes as you increase speed, pull off the road and stop. You need to check your load for balance.

General Maintenance Tips for Your RV - Motor Coach - Trailer

Roof:  Inspect your roof at least once a year. Clean off any loose material. 
Frame: Normal road use will eventually chip away at the factory-protected underside of your trailer frame. Check the underside of your frame at least once a year and repair any chips with an automotive undercoating or matching paint. This protection helps prevent rust and deterioration of the trailer frame. An auto supply store is a good source for the undercoating.
Floor: To protect your plywood floor, promote long life and make cleaning easier, it is recommended that you paint it with an oil-based enamel paint.
Exterior skin: Treat your trailer with the same care as you do your car. Use a mild, non-detergent soap, such as an auto wash, and protect with an automotive-type wax. An auto supply store can provide the appropriate products. Don’t use dish washing soap. These products can remove some of the wax protection on your trailer.
Aluminum rims: Your aluminum rims are clear-coated for lasting protection. Use only gentle cleaning agents on your rims. Never use a cleaner that is lye or acid-based. These will damage the finish. An auto supply store can guide you to the right products.

Maintenance for Frequent Trips

Tow vehicles such as motor coaches often have more frequent maintenance requirements, including changes of engine and transmission oils and filters, lubrication of components, and cooling system checks. Check your owner’s manual for information on scheduled maintenance of your motor coach if you frequently use it to haul a trailer. Here are some maintenance suggestions.

These are some basic tips to help insure a safe experience with your motor coach. We recommend you consult with your dealer or owner’s manual for your motor coach for further information.    If you have any maintenance or repairs concerns our RV Service Advisors at Security Auto & Truck, Inc in Halethorpe, MD are here to help you as well.

tire TIRES   We check your T.I.R.E Safety on every visit and offer replacement tires.
Here it is all about customer service and no job is too big or too small for us to handle. 

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Security Auto & Truck, Inc

4020 Old Washington Blvd
Halethorpe, MD 21227

location small (443) 575-6641
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Weekdays:   7:30 AM - 5:00 PM
Saturdays: CLOSED

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