Our 671 Detroit Diesel parts are top quality. Shop easy, with no annoying part numbers and no vague descriptions without pictures. Just straight forward pictures and information, with engines arranged by series and type, so you can be sure to see not only the part you need, but also complimentary products that could make your project a little easier. This page can be a great reference, including service and troubleshooting information for the 671 engine and 671 parts. We are proud to have served many satisfied customers over the years, and many have become customers for life. If you have any questions on our Detroit Diesel 671 parts for sale, our staff will be more than happy to give you more information or help you locate hard-to-find 671 Detroit Diesel parts. If you would like more information, please scroll down to see more about troubleshooting 671 blower parts, our marine engine parts, locating your engines part number, diagnosing smoke coming from the engine and selecting the proper oil type. The Detroit 671 is an engine that has found itself at home in many uses. In addition to the marine uses, you can find them in Ford F-9000 trucks, GM vehicles, tractors, farm equipment (including some Chamberlain, Allis-Chalmers, John Deere models), Eucilid Industrial Vehicles, busses (including Crown), as well as many military and government vehicles. Please note these vehicles are meant to be suggestions. Always double check the serial number, to be on the safe side. To clarify, what we refer to as 671 on this page is the same as: Lubricating Oil Information Detroit Diesel 671 engines, like the others in the Detroit Diesel line, will probably spill some oil over the course of their use. This has earned the discharged oil the affectionate nickname of ‘slobber.’ With this in mind, replacing the oil is extremely important. However, only certain types of lubricating oil should be used. Listed here are some general guidelines about the lubricating system. Type of Oil: Be sure that you are using a high detergent lubricant made for heavy duty use. The type S-1 oil should be used, especially in warm or temperate conditions. S-2 may be used, as long as you are using fuel oils that have less than 0.5 percent sulfur. S-2 in particular should be used if the engine is constantly exposed to temperatures below freezing. Viscosity: 10W-30 and 5W-20 should not be used in the 671 engine. The recommended viscosity is SAE 30. However, if the temperature is below freezing, other viscosities may be used. For example, from 0-30 degrees Fahrenheit, SAE20W can be used. For temperatures below zero degrees Fahrenheit, SAE10W30 can be used. This can help with the problem of starting the engine in cold temperatures. Troubleshooting a 671T Please note that these values are for four-valve, turbocharged engines. Values for other engines may vary slightly. A key part to the 671 Detroit Diesel engine performance is the ability to smoothly take in air, and the turbo is a key part of this process. This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. Listed here are some general maintenance items to check. If you do suspect that the turbocharger is giving you problems, we have a section here for removal and general maintenance of the unit. We also have a useful troubleshooting guide below that can help diagnose other problems with the engine. Of course, if you need any additional help, give us a call at 888-433-4735 and we will be happy to help figure out what the issue might be. Servicing the Turbocharger on a 671 Detroit Servicing the turbocharger can be a simple process when done correctly. Please remember to always note the location of any removed items, to properly replace them when done. This is intended as a general guide, and if there is any doubt then be sure to consult with an experienced Diesel mechanic before performing any servicing. Step One: Prior to removal, drain the cooling system, and disconnect the oil and water lines. Next, disconnect the engine blower tubing, turbocharger air inlet and remove the silencer (if used.) Then disconnect the connection to the exhaust. Step Two: Use a sling or rope to make sure the turbo is supported. Step Three: Locate the supporting bracket bolts and remove them. The turbocharger can now be lifted from the engine. Step Four: Remove any grease, debris and dirt from the outside of the unit. Clean and sludge deposits, and blow out air passages. Step Five: To install a new one (or reinstall old unit), replace all of the gaskets before install. A rope or sling can then be used to lower the turbo back into place. Be sure to attach the turbo to the bracket first, before the bracket can be attached to the engine. Step Six: After all of the tubes and inlets are reconnected, be sure to prime the lubricating oil. This can be done by disconnecting the oil inlet line near the top of the unit and pumping clean engine oil into the turbo. Then, reconnect the oil lines. Step Seven: Refill the cooling system and be sure to check for any leaks when the engine is initially restarted. Troubleshooting Smoke Have a smokey Detroit 671? The following will give you a guideline of some common causes of smoke coming from the engine. Black / Grey Smoke: The first thing to check with black or grey smoke is the exhaust. Remove the muffler and manifold and see if that resolves the issue. If this is not the reason, check the areas where air enters the system. For example, check the air cleaners, the ports for the cylinder liners, as well as making sure the area around the engine allows for fresh air. Besides the air, black or grey smoke can also be due to excess fuel entering the chamber, from improper setting of injector racks or improper timing of the injectors. Double check that the injectors themselves are functioning. It can also be caused by fuel that is too ‘heavy’ or the wrong grade. Blue Smoke: Blue smoke is usually caused by fuel that is not burned when it should be. In other words, the fuel is pushed through the cylinder when fresh air is taken in. If this is the case, check the seals for leaks, especially around the blower. Also, be sure to check the oil lines and anywhere they are connected. White Smoke: The most likely cause of white smoke is one or more misfiring cylinders. If you cut off the fuel supply to a particular injector and the white smoke stops, then that injector should be replaced. At Diesel Pro, we have built our business around those who work in or around boats. So if you are looking specifically for marine parts, you have come to the right place. We specialize in providing parts for marine engines, especially the Detroit 671 (sometimes referred to as Gray Marine.) In other words, if you are the captain of a boat, or a marine mechanic, you have come to the right place. We offer many products that are essential, as well as a wide variety of products that commonly used on boats that aren't directly part of the engine, such as sirens, lights, and so on. You can also visit our 'Sea Water' option above to see impellers, heat exchangers, and water strainers, which are absolutely key to a boat engine running as smoothly as it should. To jump to a specific section, please select an option below: See Impellers, Raw Water Pumps, Heat Exchangers and more Marine Lights, Life Jackets, Sirens, Toilets See 671 Two Valve Parts for Sale See 671 Four Valve Natural Parts for Sale See 671T (Turbo) Parts for Sale Oil Filters For Detroit Diesel 71 Series Inline Engines (671) Lubricating Oil Pressure Regulator For Detroit Diesel 71 Series Inline Engines (671) Oil Cooler For Detroit Diesel 71 Series Inline Engines (671) Ventilating System for Detroit Diesel 71 Series Inline Engines (671) Recommended Oil and Maintenance Intervals For Detroit Diesel 71 Series Inline Engine (671) Troubleshooting Common Lubrication System Issues For Detroit Diesel 71 Series Inline Engines (671) Radiator Cooling For Detroit Diesel 71 Series Inline Engines (671) Heat Exchanger Cooling For Detroit Diesel 71 Series Inline Engines ( 671) Comparing Radiator and Heat Exchanger Cooling For In Detroit Diesel 71 Series Inline Engines (671) Guideline For Coolant For Detroit Diesel 71 Series Inline Engines (671) Types of Coolant For Detroit Diesel 71 Series Inline Engines ( 671) Coolant Considerations for High-Temperature and Freezing Conditions Chemicals & Coolant For Your Detroit Diesel 71 Series Inline Engine (671) Filling and Bleeding the Cooling System For Detroit Diesel 71 Series Inline Engines ( 671)  Introduction to the Water Pump System for the 71 Series Inline Engine ( 671) Freshwater Pump Maintenance For Detroit Diesel 71 Series Inline Engines (671) Disassembly of the Freshwater Pump For Detroit Diesel 71 Series Inline Engines (671) Reassembly of the Freshwater Pump For Detroit Diesel 71 Series Inline Engines (671) Raw Water Pump Maintenance (Marine Applications) For 71 Series Inline Engines (671) Disassembly of the Raw Water Pump For Detroit Diesel 71 Series Inline Engines (671) Cooling System Troubleshooting For Detroit Diesel 71 Series Inline Engines (671) Torque Specifications for Key Components For Detroit Diesel 71 Series Inline Engines (671) Parts Grading and Condition Assessment For Detroit Diesel 71 Series Inline Engines (671)Detroit 671 Parts and Information
Parts for Detroit Diesel 6-71
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Select TypeParts for Detroit Diesel 6-71
If you need to find the serial number, look on the cylinder block. You will find a serial number that is similar to 6A18959. The first digit is the number of cylinders, so this example would be a 671 engine. In some older engines, the full engine size and series could be seen in the first three digits. For example, 671-RA63, the first three digits indicate it is a 6 cylinder member of the 71 series. Of course, if you are having any difficulty, call us and we will be happy to help.
Oil Capacity: This engine uses 7 gallons of oil, which is 28 quarts. The engine should not be operated if the oil levels fall below 22 quarts.Marine Engine Parts
Additional Resources For The Detroit Diesel 6-71:
Practical Guide To Servicing Your Detroit Diesel 71 Series Inline 6-71 Part 1Â Practical Guide To Servicing Your Detroit Diesel 671 - Part 2
Engine Components and Their Roles (Covering Detroit Diesel 671 Engines)
Key Maintenance Procedures (Covering Detroit Diesel 671 Engines)
Assembly and Disassembly Guidelines (Covering Detroit Diesel 671 Engines)
Safety Protocols for Technicians (Working On Detroit Diesel 671 Engines)
Torque Specifications and Wear Limits (Covering Detroit Diesel 671 Engines)
Exact Torque Specifications for Detroit Diesel Series 71 Inline Engine Components (Covering Detroit Diesel 671 Engines)
Wear Limits for Critical Engine Parts and How to Measure These During Inspections (Covering Detroit Diesel 671 Engines)
Lubrication System For Detroit Diesel 71 Series Inline Engines (6-71)
Cooling System and Heat Exchanger For Detroit Diesel 71 Series Inline Engines ( 671)
Introduction to the Cooling System and Heat Exchanger For Detroit Diesel 71 Series Inline Engines ( 671)
Routine Cooling System Checks and Maintenance For Detroit Diesel 71 Series Inline Engines ( 671)
Water Pump For Detroit Diesel 71 Series Inline Engines (671)
Thermostat Operation For Detroit Diesel 71 Series Inline Engines (671)
Ventilation and Crankcase Vapor Collection For Detroit Diesel 71 Series Inline Engines (671)
Troubleshooting and Specifications For Cooling & Lubrication In Detroit Diesel 71 Series Inline Engines (671)
Overview of Troubleshooting in Lubrication and Cooling Systems For Detroit Diesel 71 Series Inline Engines (671)
Systematic Approach to Troubleshooting For Detroit Diesel 71 Series Inline Engines (671)
Troubleshooting Tips for Improved Efficiency In Detroit Diesel 71 Series Inline Engines (671)
Summary of Troubleshooting and Specifications In Detroit Diesel 71 Series Inline Engines ( 671)
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