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huwwatkins
Site Subscriber
Joined: 10 Jun 2004
Posts: 2317
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| Posted:
Mon Aug 30, 2004 3:03 pm |
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Thinking of changing the head gasket on the Chammy. Just wanted to know if the heads usually need skimming? I seem to remember Chris saying a good clean up was all that most needed? If it does need a skim, do I need to remove anything from the head, like valves?
Cheers
Huw |
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BenR
Level 5 User
Joined: 18 Jun 2004
Posts: 114
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Mon Aug 30, 2004 4:24 pm |
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if its just a skim and t hasnt had a skim before then you dont have to strip it.
Get a steel rule and firstly use a torch (i prefer the LED type as the light highlights stuff better) and see if there are any gaps along the cylinder head. Checl lengths, wedths at several points and the diagonal. If you can see light its going to need a skim, get your feeler gauges out and measure how much.
If not, you can just use a nice straight block of wood etc, wet and dry the face clean and put it back on. |
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Fat Dave
Site Subscriber
Joined: 22 Mar 2004
Posts: 150
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Tue Aug 31, 2004 9:44 am |
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i have just done mine, i did check mine and it was ok, just gave it a good clean up, and all seems fine. |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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Tue Aug 31, 2004 12:54 pm |
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as u know i didnt skim mine...just a clean up |
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BenR
Level 5 User
Joined: 18 Jun 2004
Posts: 114
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Tue Aug 31, 2004 3:30 pm |
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its a low compression engine anyway, so a skim is nice. |
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Chet T16
Retroholic
Joined: 12 Feb 2004
Posts: 5685
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Tue Aug 31, 2004 3:43 pm |
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You try tellin me its low compression when tryin to run 5psi boost on 95ron  |
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stan
Gay Rights Activist
Joined: 07 Apr 2004
Posts: 1268
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| Posted:
Tue Aug 31, 2004 4:55 pm |
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thats cos ur ignition timing isnt set-up 4 a turbo.... |
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BenR
Level 5 User
Joined: 18 Jun 2004
Posts: 114
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Tue Aug 31, 2004 5:38 pm |
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10:1 TCR is nothing on a turbo with the correct chamber, even on 95.
In reality when running at peak efficiency (NA) your only looking at about 8:1 ECR.
Static CR's mean jack and shit since they only even apply when the enigine isnt moving. |
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Chris H
Forum Moderator
Joined: 02 Mar 2004
Posts: 19978
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Wed Sep 01, 2004 3:24 am |
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lol so true, CR's another very missunderstood area of cars. |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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Wed Sep 01, 2004 3:25 am |
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i agree with that, but i think the static CR is a useful way of measuring effects of work done to the engine...eg skimming, new pistons etc cos they can be measured without the engine running to give u a clue as to whats changed. |
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Chet T16
Retroholic
Joined: 12 Feb 2004
Posts: 5685
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Wed Sep 01, 2004 5:47 am |
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lol i was only takin the piss |
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