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Oil Pump/Timing cover clearance question Posted by SaabFam5 [Email]  (#1598) [Profile/Gallery]
(more from SaabFam5) on Sat, 16 Aug 2014 04:12:27
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My daughter and I are working on her project car, a '00 9-3SE 'Vert. 191k miles. We're currently doing the big timing chain job; engine in car, head off, oil sump off, and just now timing cover off. In checking the outer oil gear to cover clearance, we found a clearance of .0045" or .1143mm. I realize this is over spec., but my question is how critical is this clearance? Should we just go ahead and replace the timing cover? And if so, also the gears and oil press relief valve? There is no sign of scoring on the gears, PRV valve or body, in fact the entire inside of the engine is very clean. (We cleaned the sump ages ago, when she first got it, and she has been very good at regular oil changes.) Also, there was no other problems like an oil pressure light or anything, just a little timing chain noise. And those components are worn but not too badly. The reason for this job was the timing chain tensioner was broken off in the head. (I didn't do it, haha, some dunderhead a local shop who didn't know Saabs, but this is another long story in itself!) Anyway, the head is repaired, cleaned, milled and ready to go on, along with all the other new parts associated. But...the timing cover. Some have said the clearance is no big deal and that these engines rarely have an oil pressure problem, while others have said the opposite. I personally believe there are clearance tolerances for a reason. On the other hand, we've already spent a ton of money on this job, and I hate to drop another 300 for a cover, pump gears and a PRV if it's not necessary. Also, long term plans for the car are to keep it, drive it, and enjoy it.
So what do you all think?
Thanks again!
, Sat, 16 Aug 2014 04:12:27 <-- Viewing This Message
, Mon, 18 Aug 2014 10:08:17, Tue, 19 Aug 2014 16:49:30
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