Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Low compression, are my cams out of time ??

Old Jun 23, 2013 | 12:12 AM
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Lightbulb Low compression, are my cams out of time ??

If there is a better place for this please redirect.

Just picked up a 1994 850 turbo. It had busted heater core and info that the car was driven till so hot it lost power possibly more than once. Ran a compression test both dry and wet and got a fairly consistent 60 PSI on all 5 cylinders. I thought the cams must be out of time but after getting a visual on the belt it all lines up but I did not trust the paint pin marks on the cam gears so I pulled the distributor and cam position sensor and can see that the slots are lined up horizontally with the Intakes slot being high and the Exhaust slot low (see picks).

Any suggestions?



 

Last edited by volvo48; Jun 23, 2013 at 03:01 AM. Reason: typo
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Old Jun 23, 2013 | 03:08 AM
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The vehicle has more than 200,000 miles on it.
 
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Old Jun 23, 2013 | 08:34 AM
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can you post a pic of the cam gears? seems to be in time to me
 
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Old Jun 23, 2013 | 01:26 PM
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This pic is not dead on but everything lines up when it is dead on.


 

Last edited by volvo48; Jun 23, 2013 at 01:32 PM.
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Old Jun 23, 2013 | 01:47 PM
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Pretty much dead on. These cars have soft aluminum heads, they do NOT forgive over heating. I would say that the head is warped and the head gasket is blown. I'd be shocked if not.

Usually you'd get some good numbers and some low numbers so all being low is a little strange. Have you drained the oil to see if some coolant mixed in there?
 
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