SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: Gearheadlab on June 14, 2011, 09:13:33 PM

Title: Oil Inside my dist. cap????
Post by: Gearheadlab on June 14, 2011, 09:13:33 PM: Hey guys! I lost spark to my bbc. when i pulled the cap, i noticed oil in the distributer. Is this normal? i was under the impression that there shouldnt be any oil in there. the dist. is an msd street fire.

Any help would be much appreciated! O0
Title: Re: Oil Inside my dist. cap????
Post by: IRRebel on June 14, 2011, 09:15:35 PM: I just replaced the dizzy in my BBC for the same reason. GT says the upper bushing/seal went out.....

Ray
Title: Re: Oil Inside my dist. cap????
Post by: GT Jets on June 14, 2011, 09:51:14 PM: Excessive crankcase pressure will do this.

You need to check a few things to make sure there is not a problem with the distributor itself, the bushings for one like Ray stated, but more importantly, you have to realize that there is actual oil pressure on the distributor shaft at the very bottom of the housing, so if crankcase pressure is excessive it will force oil straight up to the centrifugal advance mechanism and sling the stuff everywhere.

I would start with proper venting of the engine crankcase pressure and going from there...These are tried and true designs and this is the only thing I can think of. Big vents on the valve covers are a must have. ;)

Good luck

GT
Title: Re: Oil Inside my dist. cap????
Post by: Gearheadlab on June 15, 2011, 05:23:21 PM: It started doing this weekend at river. Didn't do it last year. Could too much oil maybe cause that? I have a 10 quart pan. I put 10 in it?