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| Bug |
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Hey all, This question may be impossible to answer but any opinions are welcome.
I have twice in the history of my engine blown a head gasket and both times the head was resurfaced. The 2nd time the mechanic mentioned my comp ratio would be up a little.. I know without more info on the state of the head its hard to tell, but any guesses on how much they would have shaved back?
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| ausdealer |
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Age: 74 Posts: 66 Joined: 28th Jan 2006 Ride: EA Wagon, EF Sedan and a Trader Location: Brisbane |
Depends how bad the head was warped or out of flat. Hopefully any serious corrosion would have been repaired before surface grinding.
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
would be something between 5 and 20thou
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| Bug |
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What kind of equip is required to measure the comp ratio?
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| kwaussiekid |
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Even taking 20thou off will hardly make any significant difference. You will know if it labours using lower grade fuel. You may have to run premium full time to compensate.
_________________ The older I get the better I was! |
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| prydey |
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my ef xr6 that i had used to ping on anything less than 98 octane after i had the head done. the mechanic made the comment that it was quite warped and had to be faced quite a bit.
you could face a similar situation depending on how much its been faced.
_________________ eb v8: low loud and fast. just how a v8 should be. i guess the big question is, is it fast enough... |
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| Bug |
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kwaussiekid wrote: Even taking 20thou off will hardly make any significant difference. You will know if it labours using lower grade fuel. You may have to run premium full time to compensate.
I always run premium and lpg. I considered putting some regular in to see what happens though.
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
Bug wrote: What kind of equip is required to measure the comp ratio?
to do it properly would mean you'd have to take the head off again. you could have a compression test done and compare it to stock spec. That would give you a rough idea as to the change. but you probably find all it has done is make up for the lost compression from engine wear |
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