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95 Grand Am No compression

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Old 01-08-2011, 08:49 PM
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Default 95 Grand Am No compression
95 Grand Am 2.3 ltr. DOHC. Just recently the car would not start. Did a compression check wet and dry. Zero's across the board. Checked timing chain....good. Replaced head gasket 5 yrs ago with no problems up till now. The car turns over, but sounds funny, like no compression, which the compression gauge confirms. Any other ideas? Thanks.
 
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Old 01-11-2011, 01:56 PM
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Did you check if both the cam sprokets are turning when the engine cranks?
 
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Old 01-11-2011, 06:05 PM
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yes, I did. They are both turning.
 
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Old 01-11-2011, 08:36 PM
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2.3's are known to jump timing. you checked to see if everything was turning, but did you actually check to see if the timing was set correctly?
 
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Old 01-11-2011, 08:43 PM
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Yes....just replaced the chain as well. Everything is aligned properly. Still no compression all the way accross.
 
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Old 01-11-2011, 08:52 PM
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blown head gasket, bent valves. How many miles on the motor? Did the issue just all of a sudden happen, or did it progressively run worse to the point it would not start?

you said it sounds funny, describe "funny"
 
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Old 01-11-2011, 09:04 PM
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You know, now that you mention it, when I did go out to start it that day, it sounded like it did have compression to a point, then it sounded like it lost compression all of a sudden.

Sounds funny.....just as in she just turns over very easy. Sounds like no compression, with or without the plugs in. Sounds the same.
 
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Old 01-11-2011, 09:11 PM
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are the cams actually turning (i know the sprockets are, but is the whole cam turning). I've heard of cars breaking camshafts, albeit, not typical. It's happened.

Coolant in the oil? or visa versa? plugs wet? big *** hole in the block? Something is stuck open, either it be a broken cam, or a severely messed up cylinder head.
 
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Old 01-11-2011, 09:22 PM
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Yea there is coolant in the oil...forgot to mention that! 142k miles. When I replaced the chain, sprockets, etc. the end of the cams were fine, they're turning as well.
 
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Old 01-11-2011, 09:44 PM
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coolant in the oil is a blown head gasket, which is why you have no compression.
 
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