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Low compression

 
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Old 05-04-2005, 08:22 AM
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Low compression

hey everyone,

I'm looking into buying a 89 toy p/u 3.0l v6.

It has low compression, so the price is ridiculously cheap.

what exactly could be causing the low compression? I just want to know what I'm getting into if i do purchase it. Does it need new HG, or is it something more serious.

I may just try to find a remanufactured engine to throw in there..

any help is appreciated

tre
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Old 05-04-2005, 12:24 PM
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How low is low, and on which cylinders. If it's low on 2 joining cylinders and OK on the rest then that's probably a head gasket. If all of them are low then your looking at worn rings. Even if it's a head gasket on a 89 you may want to do a valve job while the heads are off, so that will add to the cost.
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Old 05-04-2005, 01:49 PM
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Cool, thanks for the info. I'm going to be running a compression check on it tonight to see what cylinders are bad...
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Old 05-04-2005, 04:15 PM
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post up what you find to.

my #'s were around 172,165,162,160 starting from the front to the rear.


those arent low are they? its a 22re with a 1/4 million on her almost, well, 223000,

wade
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Old 05-04-2005, 05:36 PM
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Originally Posted by wimpywade94
post up what you find to.

my #'s were around 172,165,162,160 starting from the front to the rear.


those arent low are they? its a 22re with a 1/4 million on her almost, well, 223000,

wade

they arent low...but all cylinders have should have a certain % difference...and the difference between 172 and 160 is really gonna be pushing it....I dunno what that % is, you may be able to check the service manual about this....
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Old 05-04-2005, 06:05 PM
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Originally Posted by CynicX
they arent low...but all cylinders have should have a certain % difference...and the difference between 172 and 160 is really gonna be pushing it....I dunno what that % is, you may be able to check the service manual about this....
160 and 172 are only about 7% apart, so it should be OK.

Last edited by Glenn; 05-04-2005 at 06:10 PM.
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