Heavy Truck EGR Cooler Repair Service

The Best EGR Cooler Repair Service in Tennessee & Mississippi

EGR coolers are a well known fragile point on most diesel engines. It is important to take care of your truck's EGR exhaust cooling system and protect your engine.

What Does an EGR Cooler Do?

The cooler in your truck's EGR system works with the EGR valve to create a mix of air, fuel, and exhaust gasses that lower emissions. Exhaust Gas Recirculation (EGR) lowers combustion temperatures by diluting the air/fuel mixture with a small amount of inert exhaust gas. This process has no effect on the performance of your truck but it does reduce the change of chemical reactions that form pollutants. That being said, it is far more effective if the exhaust gas is cool, not hot. That is where the cooler comes in. The flow of exhaust gases through the EGR cooler is controlled by the vehicle’s computer via the EGR valve. Since the EGR cooler connects the exhaust and cooling systems of your engine, failures inside the cooler may lead to coolant loss, overheating, and engine damage, among other issues.

How Do I Know My Cooler is Going Bad?


Complete failure of your EGR’s cooling system could cause major damage to your engine. If you know what to look for, you may be able to spot your cooler’s failure before it becomes disastrous.

The most common first sign of failure is white exhaust smoke. This “smoke” is really steam from boiling water or coolant. This steam can be caused by a head gasket failure, a cracked EGR cooler or condensation inside the exhaust system.

As with any coolant leak, you may start noticing a lack of coolant in your overflow bottle. If you have to keep refilling your coolant system, and you don’t notice any drips on the ground, that coolant may be exiting through the exhaust via a leaking cooler.

Severe failures can lead to more serious problems such as connecting rods to bend, stretch head bolts, or blow the head gaskets, all causing severe engine damage.

How Can I Clean My EGR Cooler?

Replacing a cooler can get expensive. Failure is probably unavoidable, you may be able to extend the life of this part by keeping it clean. Clearing out soot and debris can restore an even flow through the cooler, which can reduce internal pressures and improve cooling performance.

There are several methods for cooler cleaning, but they all boil down to the same steps:

- Remove the cooler from the vehicle.

- Fill the cooler with a detergent.

- Let the cooler soak in the detergent to dissolve deposits.

- Thoroughly rinse the cooler to remove the loose deposits.

- Let the cooler dry, then reinstall it.

To clean really dirty passages, some repair shops place EGR coolers inside an ultrasonic cleaner. The ultrasonic waves vibrate the carbon loss while circulating detergent through the passages. This can speed up the cleaning process.

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Customer Reviews

We pride ourselves in putting our customers first. Our mechanics know the importance of treating every vehicle like their own.

Customer Reviews

We pride ourselves in putting our customers first. You can rest assured that our mechanics know the importance of treating every vehicle like their own.

Cherish P.

Cherish P.
Nashville, TN

We had our truck towed from the dealership.  We saved moneycoming here, even including the tow bill.  We also didn't have to wait 2 weeks like the dealership said it would take.

Felicia Wells

Felicia Wells
Kingston Springs, TN

Driving an RV from SC through TN on a Sunday. Called the big company near Specialized Trucking to jump our generator. Wouldn’t help us. I called Specialized Trucking helped us while extremely busy got our generator jumped in less than 10 minutes. Rock star service. Thank you SO much!!!

Ferris Bruford

Ferris Bruford
Memphis, TN

Our business requires that our trucks be up and running constantly. We run an extremely tight schedule with our equipment. We don't have time for our trucks to be down. We have scheduled the mobile trucks to be to us when our truck arrive to our location to take care of repairs. Specialized Truck Repair has never failed us. We can count on them 24 hours a day. Thank you for always going the extra effort to help us succeed!

Kristin Campbell

Kristin Campbell
Memphis, TN

We had an emissions problem on our Peterbilt. The tech was professional and courteous. I recommend these guys to anyone needing expertise

Peggy Bond Kinney

Peggy Bond Kinney

A trusted place to take your truck for repairs. Highly recommend.

Kaitlyn Allen

Kaitlyn Allen
Springfield, TN

Absolutely fantastic! I work for a roadside assistance company and I called then to help us with a tow the other night, Blue was amazing. He got there quickly and was super pleasant on the phone. If I can even get more business their way they will get it every time. #teamblue

Charles Griffin

Charles Griffin

They got my truck in quickly and fixed the issue. Edgar was very knowledgeable and helpful.

D. Carruthers

D. Carruthers
Fairview, TN

The employees at this shop did there best to Get me fixed and back rolling before closing time Saturday Evening. And they did it ! As an owner operator struggling to Survive and dodge rip off shops. Thanks so much !!

Renee Wages

Renee Wages
Kingston Springs, TN

This place was a great place to get a repair, they were very nice and fast and professional and it was very cost efficient. Highly recommend giving this shop a try! Stephon really knew what he was doing. Awesome Job!!

Doug Wagner

Doug Wagner
Fairview, TN

Brought my truck in because the air vents were not working right. When I turned on my heat it would blow cold out the a/c vents. The tech Kevin had my dash tore apart and fix the problem and had it all back together in an hour. Thanks for the great job.

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