how fkd is it? running an engine with no fluid.

manga_blue · Postby **manga_blue** » Mon Apr 22, 2013 1:02 pm

Mazda specifies:

NA6
192psi standard compression (presumably new)
28psi maximum variation between cylinders
135psi minimum spec

NA8
182psi standard compression
28psi maximum variation between cylinders
128psi minimum spec

The big difference between wet and dry suggests it's almost all ring wear.

Also note how compression gets weaker from 1 through to 4 on yours. That's what a coolant re-route aims to avoid. It may suggest that this was pre-existing wear. If you had no coolant when the panelbeaters drove it then they probably wouldn't have generated such a linear trend.

plohl · Postby **plohl** » Mon Apr 22, 2013 1:14 pm

manga_blue wrote:Mazda specifies:

NA6
192psi standard compression (presumably new)
28psi maximum variation between cylinders
135psi minimum spec

NA8
182psi standard compression
28psi maximum variation between cylinders
128psi minimum spec

The big difference between wet and dry suggests it's almost all ring wear.

Also note how compression gets weaker from 1 through to 4 on yours. That's what a coolant re-route aims to avoid. It may suggest that this was pre-existing wear. If you had no coolant when the panelbeaters drove it then they probably wouldn't have generated such a linear trend.

Thanks very much for the detailed post!

I put a re-route on the engine when i installed it. I think the last comp test i did <12months ago the values were ~150psi Iirc dry.

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