How Can We Make This Page Better For You

We will work on your suggestions inmediately!

Optional - If you would like to be notified when your suggestion is implemented.

close X

Detroit Diesl 371 Troubleshooting

Detroit Diesl 371 Troubleshooting

The chart below shows the most common questions asked by owners of Detroit Diesel® engines 3-71 natural 4 valves when trying to troubleshoot why their engines underperform.  It categorizes areas of possible malfunction, likely cause and recommended action to bring your new, rebuilt or used  Detroit Diesel® engine back to proper operation.  The chart will give you confidence when speaking with your Detroit Diesel® engine mechanic or ordering parts.  As a quick reference guide only, the chart must not be thought of as a substitute for the use of your Detroit Diesel® engine 3-71 natural 4 valveOwner's operating or service manual.
For your convinience in looking up parts and pricing, please click here. You can also call us at 1-888-433-4735 or 305-545-5588.   We also encourage you to do a Google search for Detroit Diesel forum or Detroit Diesel forum 3-71 where you may find information from other people that have had the same question you have about your diesel engine.

PROBLEM

POSSIBLE REASON

CHECK

Engine will not startLack of air intake or restricted air intake
Broken blower shaft 
Worn out blower shaft 
Defective fuel pump 
Defective starter 
Discharged battery 
High exhaust back pressure 
Black smoke coming out of engineDefective injector 
Contaminated fuel 
Broken or worn cylinder parts 
Engine overloaded 
Faulty intercooler or aftercooler (for turbo engines only) 
White smoke coming out of engineBroken piston ring 
Incorrectly installed ring set 
Defective injector 
Fuel quality or grade 
Long idle periods 
Broken or bent push rod 
Injector or governor improperly adjusted 
Low engine oil pressureWater in engine oil pan 
Fuel in engine oil pan 
Defective oil cooler 
Engine overloaded 
Crankcase overfilled 
Low engine RPMImproperly working injector 
Governor calibration 
Hi engine RPMGovernor calibration 
Engine overheatingDefective fresh water pump 
Defective raw water pump (marine engines only) 
Defective thermostat or thermostat seal 
Clogged radiator or heat exchanger (marine engine only) 
Grey smoke coming out of engineLong idle periods 
Defective intercooler or aftercooler (for turbo engine only) 
Restricted air intake 
Defective injector 
Contaminated fuel 
Blower or turbocharger seals leaking 
Geartrain makes noisesLow oil level 
Engine driven accesories 
Damage main or rod bearing 

Click to start downloading your free troubleshooting checklist chart!

For more information on a specific part, please feel free to visit a page below:

Blowers for 71 Series Engines