Date: Tue, 7 Mar 2000 23:47:15 -0800
From: "Steve Marks" <>
Subject: Re: Knocking from Engine Valve Adjustment?

The valves on a '88 900 T are not to be adjusted. The cam gear mechanism uses hydraulic cam followers to keep the valve clearances within a limited range (2.055mm). The cam followers are sealed units and require no maintenance or adjustment. It could be that the timing chain follower is the source of the sound you're hearing. This is considered nprmal if the noise goes away within 30 minutes or so. If the noise does not go away either the follower is faulty, the oil pressure to the follower is too low, or there is air trapped in the system. If it is ALWAYS noisy the follower is probably faulty and needs to be replaced. NOTE: Cylinder heads of mid-1988 models had internal oil passages, and it is possible that air can become trapped in the system. If more than one follower is noisy try bleeding the lube system beforwe replacing the followers. Check the Robert Bentley SAAB 900 16 valve service manual for years 85 -93 for instructions. One other possibility is a noisy idler pully for the A/C drive belt. Try removing the A/C drive belt and see if the noise goes away. Hope it's the cheap and easy one!! ;-). bradford <schroebrnopsamedu> wrote in message news:8a42tj$etr$ > My 88 9000T's engine has been making this knocking sound. Its not > really fast or anything..Although it is constant. It sounds like its > comming frmo the left of the engine. It is a little bit louder when it > is cold and then gets quieter as it warms. A friend told me that I > needed a simple valve adjustment. Does this sound right. How much does > it cost? It is exremtly bad for the engine? Is it still OK to run for a > little while? Is it not a valve adjustment..Please help as I dont want > to cause a problem. Thank you > Brad > > > Sent via > Before you buy.

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