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psi compression for 300 i6???

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Old Sep 10, 2010 | 01:40 PM
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nstueve
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psi compression for 300 i6???

I need the compression numbers for the 300 i6? I've heard 150-160psi??? anyone know what the acceptable range is???

oops... i'm looking for the 1986 300 I6 numbers... I'll post in the right forum above... unless anyone knows the answer here???
 
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Old Sep 10, 2010 | 02:25 PM
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the 150 mark sounds about right, but try within 25% of the highest number when you do the compression test
 
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Old Sep 10, 2010 | 02:45 PM
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nstueve
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well i've heard they can be as high as 180psi... I know all the cylinders should be close to the same psi to run well... I am looking at a old truck with a supposed 65K on a rebuild... I am always on the skeptical side so i wanted to do the compression test to be sure. I just need the engine out of this truck and it runs... but if i'm going to be buying the truck strickly for the engine i want to make sure it's going to be a "good transplant" before I buy it...
 
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