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Detroit Diesel 6V92 Troubleshooting

Detroit Diesel 6V92 Troubleshooting

The chart below shows the most common questions asked by owners of Detroit Diesel® engines 6V92 Natural 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 6V92 Natural Owner'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 6v92 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 start Lack 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 engine Defective injector  
Contaminated fuel  
Broken or worn cylinder parts  
Engine overloaded  
Faulty intercooler or aftercooler (for turbo engines only)  
White smoke coming out of engine Broken 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 pressure Water in engine oil pan  
Fuel in engine oil pan  
Defective oil cooler  
Engine overloaded  
Crankcase overfilled  
Low engine RPM Improperly working injector  
Governor calibration  
Hi engine RPM Governor calibration  
Engine overheating Defective 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 engine Long idle periods  
Defective intercooler or aftercooler (for turbo engine only)  
Restricted air intake  
Defective injector  
Contaminated fuel  
Blower or turbocharger seals leaking  
Geartrain makes noises Low oil level  
Engine driven accesories  
Damage main or rod bearing  

Need More Specific information? We offer Detroit Diesel 6V92 Manual

 

Detroit Diesel 6V92 Usefull Information 

The Detroit 6V92 is a tough engine that can run for many, many years. Proper maintenance, combined with the right parts, is absolutely key to their longevity. At Diesel Pro, we offer the right, high-quality parts that will let these engines keep running, year after year after year. We have served many satisfied customers since we opened our doors over a decade ago, and know that if you buy parts from us, you will be satisfied. Our parts carry warranties that are better than most other part suppliers, including a one year warranty on new parts. We have also built a website that is focused on you, our customer. This includes better descriptions, better pictures, and a fully integrated shipping calculator which automatically checks with multiple shipping partners to present you with several options upon checkout, so you can get the part as fast as you want, for a price you want. In other words, why would you go anywhere else for parts? Try Diesel Pro today.

The model number for the Detroit 6V92 will always start with 806 and be similar to "8063-7000". The model number will always have eight digits. These engines also have a serial number, which can be longer, depending on when they were manufactured. The serial number will always start with 6VF, and an example of one would be "6VF 12345".

This engine can go by many other names, including V6-92 Detroit or 6V-92, among others. This is due to this tough engine being used in many different applications, from farm equipment to generators, to busses and recreational vehicles. These are just different spellings, and the parts listed here will work with these engines. If any doubt, be sure to check the model or serial number.


General Information

The Detroit Diesel 6V92 is a two-cycle, six cylinder engine with a bore of 4.84 inches (123mm) and a stroke of 5 inches (127mm.)

The compression ratio is 17 to 1.

The Detroit 6V92 Engine has a total displacement of 552 inches or 9.05 liters, and has 4 main bearings.


Normal Conditions for This Engine

For Natural Engines:

• Oil Temperature: 200-235 degrees F.

• Coolant Temperature: 160-185 degrees F. Please Note: Coolant temperatures will be slightly higher in engines built after 1976, and normal temperatures will be between 170 to 195 degrees F.

• Oil Pressure: 50 to 70 PSI. Minimum lubricating oil pressure needed for safe operation is 28 PSI at 1800 RPM, and 30 at RPM speeds above 2000.

• Compression (at 600 RPM) pressure is 500 PSI, with a minimum of 450 PSI.

For Turbocharged Engines:

The information below is based on engines with a TV1802 turbo and 1.23 A/R turbine housing and 9290 injectors, and may vary slightly based on your engine's characteristics.

• Oil Temperature: Between 200-235 from 1200 to 2100 RPM. This is measured as the temperature in the oil pan. If you measure at the cylinder block, it will be slightly lower.

• Coolant Temperature: The normal temperature for this engine is between 160-185 degrees Fahrenheit except for vehicle engines built after 1976. For these engines, the normal coolant temperature is between 170-195 degrees Fahrenheit.

• Oil Pressure: Normal oil pressure (PSI) is 32-53 at 1200 RPM, 49-70 at 1800 RPM and 49-70 at 2100 RPM. The minimum pressure is 25 at 1200 RPM, 28 at 1800 RPM, 30 at 2100 RPM.


Replacing a Fuel Injector on the Detroit 6V92

When you look at the top of the cylinders, you will be able to see three rocker arms for each cylinder. The two outer ones operate the exhaust valves, and the center will operate the injector. This one that operates the injector will be slightly longer on one side compared to the others. These arms move on a shaft that has two brackets, and removing these brackets allow the rocker arms to be raised and then access the fuel injector.

A step by step guide is below:

Step One: Remove the valve rocker cover and discard the gasket. Then, locate small tubes going into the injector and the fuel connectors and disconnect them.

Step Two: Bring the injector and the valve rocker arms in line horizontally by cranking the engine. Remove the two rocker shaft bracket bolts and move the rocker arms away from the injector and the valves.

Step Three: Locate the injector rack control lever. Loosen the screws holding it in place and slide it away from the injector.

Step Four: Lift the injector from its seat and cover the hole to keep dirt and debris out of the cylinder head.

Step Five: Install the new injector and tighten with a torque wrench to 27.12 N • m or 20-25 lb • ft.


Changing the Oil Filter

The Detroit 6V92 engine absolutely needs clean oil in order to keep functioning as it should. The good news is, keeping the oil clean is a relatively easy process, by monitoring and replacing the oil filter every 1000 hours of operation. Here are the steps:

Step One: Inspect the shell, or outer part, of the filter. If it is obviously damaged, the entire unit should be replaced. Remove the drain plug from the bottom of the filter shell. Drain the oil.

Step Two: Locate the center stud, a long bar that runs the length of the oil filter. Remove the shell, element, and stud from the engine. Throw the element and shell's gasket.

Step Three: Remove the center studs and the gasket. If the gasket is not damaged, it can be reused. Locate the element retainer seal. Remove and discard it.

Step Four: Using the filter removal tool, take the filter out and throw it away. Remove the bypass valve by taking the screw/retainer or plug/gasket off.

Step Five: Clean the filter shell and base. The bypass valve can be cleaned in fuel oil.

Step Six: Install the center stud gasket and slide it through the filter shell. Install a new shell gasket, and put a new element over the center stud. Replace the drain plug.

Step Seven: Add oil and check the level with the dipstick.


Repair Kits

We offer several repair kits for the Detroit Diesel 6V92 engine. These kits are some of our best sellers for this series, and come complete with everything you will need for a quick fix. After all, if it can help you avoid replacing an entire engine component, these kits can pay for themselves. Even if your engine is running fine now, it is a good idea to keep some of these kits in your shop, especially if you will be in a remote area, such as on a boat.

• Sea Water Pump Repair: The sea water intake is a very important part of the marine engine, and can easily become clogged with seaweed or other debris. Luckily we have a repair kit, perfect for the engine that is going from port to port. These kits include an impeller, water seal, oil seal, bearing, shaft, gaskets and more.

View Raw Water (Sea Water) Pump Repair Kit

• Fuel Pump Repair Kit: Our fuel pump repair kit will work with both left and right hand oriented engines and will get your pump back to running like new.

See Fuel Pump Repair Kit

• Blower Repair: The blower is absolutely key to your Detroit Diesel 6V92 engine running smoothly. Our blower repair kits come with seals, gaskets and more.

View blower repair kit


See 6V92 Natural (Non-Turbo) Engine Parts for Sale

See 6V92 Turbo Engine Parts for Sale




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