Quote:
Originally Posted by Sun Tuned
I put pump in a vise and did Cliffs checkball mod ,only it felt like a really big Qjet.
Seriously I whacked it about 4-5 times with a pretty good size punch and a hammer until it held a column of liquid.
I almost thought I was gonna have to get serious with it and if that didn’t work I had planned to silver braze a different ball on a rod and break out some valve lapping compound and lap the seat. But that didn’t have to get done.
You know the guys have been talking about using a smaller ball…. I may just try that on the next one.
I’ve always blueprinted my own pumps. But hell, for 235.00 you’d think you could get one that was done. Not me.
I about got sick when we pulled that engine and I pulled that pump cover and put a depth micrometer on it. They never touched that one anyway. Maybe it got missed.
Pump works beautifully now though.
The guy who owned the car wasn’t mad at all about it.oretty goid bit of work to do it again but hey, it worked out.
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I have lapped that ball seat as you described with a stick brazed to a ball. Lapped with 280 grit Clover compound. Takes a little time but that iron is pretty soft so not too bad. It's a real shame virtually everything you buy is total crap. It 's absolutely everything, not limited to Pontiac engine parts. I have had the best bang for the buck just buying a regular M54 DS. Or an F54 if you want an 80 lb. pump. Then I add a thick bottom plate and go through it before use. The Nightmare Performance plate is nice and thick.