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Oil Filler Cap Leaking Oil 700 1988

posted by  the kick inside on  Sun Mar 2 10:07 CST 2003
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last visit: Thu May 17 09:58 CST 2007
[RELATED]

erwin,

be carefull of the jigle test...it only works with the older metal caps AND (i think) if yout mounts are ok....if not (or you have a plastic cap) it gets messy...

however...modified jiggle test...

run car at idle, unscrew cap keeping fingure on top to hold in place....now rev to say 2000 rpm..cap should NOW be sucked down HARD...it if it isnt then you have presure if it is...you dont...

on my 940 I know i have negative presure (presure meters are wonderfull things...) but it still fails the jiggle test due to plastic cap and possibly dodgy mounts...

as to the stuff about the seal round the cap...what can I say I have to keep mine oil free or it seaps slightly (very fine film over head..)

One thing I found was the big hose over the head gets cruded up..still flows air etc but internal diameter and 'suck' reduced...had to spend a while cleaning mine with degreaser and platic covered wire rodding it thru...made a whole lot of diference....

interesteing thought for u...put a presure gauge on your manafold...find out what your pulling at idle...

i get -20 to -21 "





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