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How do you prime the oil pump on a 3800 supercharged GM engine with a crank driven oil pump?
Wiki User
∙ 12y ago
Pack the oil pump with vasoline prior to assembly, then crank the engine with the fuel injectors and ignition disabled until there's measured pressure.
Alternatively:
The 3800 in FWD cars is not the old 3.8L RWD Buick motor. It's still an iron 90 degree V6 but that where the similarities end. The oil pump in a 3800 is a gerotor housed in the timing cover and priming isn't necessary, although prelubricaton is probably a good idea. A coating of gear oil works.
If this is a newly built or newly rebuilt engine, hopefully you remembered to use assembly lube appropriately. A good couple few seconds of cranking with the fuel pump disabled will prime the oil pump for you.
If you're feeling oldschool and want to "prime the pump" with Vaseline, go ahead, but remember that the vaseline is going to contaminate the ever loving shiate out of your oil, so once you get it started, you need to let it idle for about 20 minutes, then drain the oil out and fill it with fresh engine oil. Don't leave the Vaseline in there for a normal oil change interval because wax and glycerine aren't good engine lubricants.
Wiki User
∙ 12y ago
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