Question about 1997 Saab 900
I'm thinking about buying a very cheap 900 2.0 8v non-turbo that has a regular knock (one second intervals at tick over). The motor has done 145k miles and runs on LPG and this is a UK car.
I'm guessing that this is a stuck lifter, snapped valve spring or damaged valve or cam lobe rather than chain or sprocket damage.
How can I more accurately diagnose without removing the cylinder head and how tricky is it to fit new lifters to both banks? Thanks for any advice you can give guys.
Try doing a compression test to see if all cylinders have same reading.
If compression is low on 1 cyl, that is obviously where to start.
Check the valve clearances to that cylinder.
If valves not set too tight, then it must be piston related.
Posted on Aug 11, 2008
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Posted on Jan 02, 2017
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