Date: Sun, 20 Jun 2004 20:56:55 -0300
From: Dexter J <>
Subject: Re: Saab 9k oil pressure drop

Salutations: On Sat, 19 Jun 2004 20:03:28 +0100, danny <> wrote: > Further to my recent post regarding the oil pressure dissapearing in my > 1990 2.3NA we got round to removing the (newish) oil pump rotors and > found nasty things. > > There were slices of what appears to be either a pin or a needle roller > cut up in the pump rotors. The slices measure 25.9mm diameter, with an > overall combined length of maybe 6mm found in there , but the pin or > whatever it is could have been longer. Where could such a thing have > come from and how could it have got past the strainer, or is it possible > to come from above? > > Incidently, the engine still starts and runs fairly quietly (apart from > the hydraulic tappets) - not siezed or anything yet. > > Now draining the sump to see what other bits of metal might be lurking > there... I cannot think of anything more disheartening - sorry to hear it. Nor can I think of of a loose pin or roller bearing that size (2.5cm?) upstream from the filter. It is possible, although it would be really wierd, that something was dropped in the head the last time the cam covers were off - maybe it's part of the tensioner (although I have no idea what). It would explain pressure drop though - must have wedged and dinged the pump blades pretty badly and I'd be looking around closely at the channels now. Surprised it didn't make a lot more noise. -- J Dexter - webmaster - all tunes - no cookies no subscription no weather no ads no news no phone in - RealAudio 8+ Required - all the Time Radio Free Dexterdyne Top Tune o'be-do-da-day Nelson, Charles - Seven Spanish Angels

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