[KRAG50]

Question

I was reading a discussion on the Pelican 944 forum concerning the Oil/air separator. They were talking about dismantling it.

My question it this, I have been working on tracking down vacuum leaks, using Flash's pressure method and listening with a hose or tube for air leaks. I've found several and repaired them except for the top of the oil/air canister, the top outer perimeter definitely has air escaping, detectable by both listening and soppy water. I originally thought by design but now not so sure as on the other Forum someone described our they disassembled and replaced a O-ring. I'm thinking a dried out cracked o-ring in that location could be causing low vacuum.Thoughts?

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[flash]

did you read my comments on that thread?



been there done that. not serviceable. took it apart to see what was inside. a whopping $400 for the replacement part later, and no change. the o-rings where it connects to the block though could cause a leak

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[KRAG50]

Yes I did, I'm not really asking if it's serviceable, I wonder about the vacuum or pressure leak around the top outside perimeter. I just can't get more than 15/16 inches vacuum and 4 psi boost so I'm trying to track down every possible leak and there is one in that location.

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[flash]

hmmm - i suppose it's possible. unfortunately i found no way to fix that. i think they glued it on the 968 unit.



it's more likely that you have a leak at the vacuum fitting. be sure you use the hard line vacuum line, and the short rubber connectors. a normal vacuum hose will cause problems.



also, if your valves or rings are leaking, or your cam timing is off, pressure will pass into the AOS.

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[Scott Collins]

KRAG50-



I suggest you contact Max at Provost Motorsports, Bordentown, NJ. Max has done repair work on these units.



I also recommend that you

be very cautions if you try to examine the rubber elbow connection from the AOS to the hard vacuum line. Time and temperature

can cause this rubber part to almost bond to the plastic receiver that protrudes from the tip of the AOS. So when you try to remove the rubber elbow because it could be cracked and leaking, it can break off the plastic receiver, which renders the AOS useless. You're now worse off than before, which is something I know from personal experience.



Best of luck.



Scott

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