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32 Oil Pump

Posted: Fri Nov 22, 2019 5:09 pm
by GJBINSC
Does anyone have a cut away of the oil pump/distributor drive gear area for a 32 Standard 8 engine ? I have developed a woop, woop, woop sound to the ear at idle. The sound becomes a soft knocking sound when I use a stethoscope at the center of the engine just below the valve cover. I suspect the cam gear drive for the Distributor/ Oil Pump. I do not suspect the cam bearings at this point as the sound fades fore and aft of the center point. It is only audible at idle and goes away at higher rpm's. Oil pressure is good. Thanks, Gary

Re: 32 Oil Pump

Posted: Sat Nov 23, 2019 6:41 am
by Dave Czirr
Could the noise be from a cam follower roller which has a little too much clearance on the pin? A little higher engine rpm and higher oil pressure and the noise goes away?

Sorry, no diagram of the oil pump and drive, have you checked the parts list for an illustration?

Re: 32 Oil Pump

Posted: Sat Nov 23, 2019 11:42 am
by GJBINSC
Yea, I thought the cam roller might be the culprit also, especially as the oil pressure increases. My parts list only shows the bottom end of the pump not the drive gear. I know there are bushings in it, so that was my target. Interesting thing happened however, I went to a car show today about 15 miles round trip, and the noise is different now, it seems to be coming more from the top of the engine possibly the distributor. Another interesting thing happened, the engine stumbled once at idle, which made me think the distributor shaft might have hung up, and caused a monetary loss of contact inside the distributor cap, but I keep the distributor grease cup full and crank on it regularly so doubt that is the issue. I checked to see if there was any play in the rotor, but it seems tight. Run today was uneventful, so will see if the sounds continues to evolve. Thanks

Re: 32 Oil Pump

Posted: Thu Feb 13, 2020 7:22 am
by GJBINSC
Dave: Definitely was the cam rollers, some bushings came out in pieces. Fair warning for anyone with a suspect cam roller issue. New ones do not have separate bronze bushings, just plain bearing surface of the hardened steel roller which should last longer.

Re: 32 Oil Pump

Posted: Thu Feb 13, 2020 7:32 am
by GJBINSC
Photo of broken roller bushings on my 32/901 engine. Many of the 16 total rollers had the same issue, so was overdue for this service, glad I caught this before it was too late.