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Good Compression test numbers?

40164 Views 5 Replies 4 Participants Last post by  DieselDeaf
I did a compression test on my 01 with 157k miles the other day.
There was only a or 2% split between all the cylinders, very happy with that. Trying to find some poop on good compression numbers.
I got 380 psi low 385 psi high, I think they are good for a truck with this kind of mileage. Can some one confirm this? Also is there a good article or old post about this subject. I can't figure our search engine on this sight to save my life. Thanks
1 - 1 of 6 Posts
a new eng. will have at least 410 to 420. a used one will have the readings you have as long as they are not between 25% from each other. a 25% drop means theres a mild dusting concern.
1 - 1 of 6 Posts
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