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Monday 8am - 5pm Tuesday 8am - 5pm Wednesday 8am - 5pm Thursday 8am - 5pm Friday 8am - 5pm

J & H Diesel Service

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United States
Greenville, MS
J & H Diesel Service

Diesel Fuel Injection and turbocharger sales and service. Also drive in diesel pickup and light duty trucks

08/21/2026

J & H Diesel Service, Inc. is hiring!
We’re looking for an experienced Diesel Mechanic to join our Drive-In Service Shop in Greenville, MS.

Work on everything from GM, Dodge, and Ford diesel trucks to school buses, mid-range trucks, and Class 8 vehicles. Duties include diesel engine repair, diagnostics, electrical troubleshooting, brakes, A/C, oil changes, and routine maintenance.

You can learn more at jhdiesel.com/employment and apply in person at J & H Diesel Service, 3401 Highway 82 E, Greenville, MS 38701.

08/08/2024

Turbo failure due to bad oil.

07/30/2021

Rust and fuel contamination at the inlet of an injector.

07/02/2021

We received this Motorpal injection pump on a Deutz engine for service. The customer said the engine had originally cranked and ran but had setup for some time and now would not crank. Upon dis-assembly our tech had found the pump had stuck pumping units due to fuel contamination. The tech had to drive them apart to get the plunger out. Notice the contaminated fuel on the plunger, at the end of the plunger, and on the return valve. The plungers were stuck in a position that left the springs compressed on the pumping unit. With the plungers stuck, the injection pump could not pump fuel and caused an engine no start issue.

03/19/2021

This turbocharger had some oil supply, but not enough. This damaged occurred after initial startup of the engine on a rebuilt engine. The oil line could have been restricted causing and lack of good oil supply. The shaft is blue from excessive heat and lack of lubrication. Notice the circular spots on the shaft. This appears on the turbine wheel after a hot shut down. The bearing stops and there is no oil being fed to the bearing. The heat makes this mark on the shaft. Also see the scoring where the bearing has failed from lack of oil.

01/18/2021

This CAT turbo failed due to a foreign object entering the turbo on the air intake side. While the turbo is spinning, the object hits the turbo fins on top of of the fins and will do so until the turbo intake wheel breaks or the object is crushed enough to let the pieces into the engine. This turbo wheel did not break and did continue to spin. Continued running of this engine and turbo would have made the wheel break due to the in-balance and damage on the intake wheel fins. This turbo failed due to FOD, Foreign Object Damage.

11/17/2020

Water and fuel contamination on a Stanadyne injection pump.

09/22/2020

Metal found in the fuel sensor of a Ford 6.7 Diesel truck. Failure from the High Pressure pump puts metal in the fuel system and injectors.

09/01/2020

Damage to turbine wheel fins on a turbocharger. Tips are bent in from foreign object damage and/or contact to the turbine housing.

08/10/2020

Fuel contamination and / or water does not take long to do damage to a fuel injection pump. This pump was recently rebuilt, but the contamination in the fuel caused the parts to rust and stick.

Address

3401 Highway 82 E
Greenville, MS
38703

Opening Hours

Monday	8am - 5pm
Tuesday	8am - 5pm
Wednesday	8am - 5pm
Thursday	8am - 5pm
Friday	8am - 5pm

Website

http://www.jhdiesel.com/

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