Help on Compression Check
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Senior User
Joined: Jan 2002
Posts: 492
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From: Spokane WA, USA
Help on Compression Check
I'm going to do a compression check, what is an acceptable PSI for the 300-6?
Also does anybody have the head torque specs and sequence they can send me. gdavis@rahco.com
Thanks guys
Also does anybody have the head torque specs and sequence they can send me. gdavis@rahco.com
Thanks guys
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Help on Compression Check
You're just asking for spam by posting your e-mail to a BBS. A moderator can edit it out for you.
The Haynes manual has the torque spec & pattern, and LOTS of other good info, so spend the $12.
For any engine, the lowest pressure should be at least 75% of the highest, and at least 85% of the adjacent cylinders. The actual pressure you get depends on the compression ratio, the ambient air pressure, the engine's condition, and the gauge's accuracy, so that's why it's rarely published. Ideally, it's 14.7 x the compression ratio.
The Haynes manual has the torque spec & pattern, and LOTS of other good info, so spend the $12.
For any engine, the lowest pressure should be at least 75% of the highest, and at least 85% of the adjacent cylinders. The actual pressure you get depends on the compression ratio, the ambient air pressure, the engine's condition, and the gauge's accuracy, so that's why it's rarely published. Ideally, it's 14.7 x the compression ratio.
