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Home > Help Needed / General Tech Chat > head gasket thickness soz to be a pain with my questions chaps

clubminiflip

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nr coventry

3rd Jul, 2007 at 09:45:08pm

just after an idea of the thickness in mm of the 998 head gaskets, i have nowt to measure mine with, i'm calculationg my C/R

cheers chaps, its appreciated as always x hehe

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joeybaby83

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Isle of Man

3rd Jul, 2007 at 10:22:11pm

on big bore engines a guideline is 3.8cc compressed.

so 3.8cc/1275*998 will give an approx compressed gasket volume

roughly....

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danboy

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Doncaster, South Yorkshire

3rd Jul, 2007 at 10:38:28pm

Joey, It might better be written as:-
3.8 x (998 / 1275).
Not trying to be clever just trying to have it correct.
Regards
Dave

joeybaby83

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Isle of Man

3rd Jul, 2007 at 10:50:12pm

or just 3 lol

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danboy

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Doncaster, South Yorkshire

4th Jul, 2007 at 08:53:56am

Yes Joey, Spot on.
Regards
Dave

Vegard

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Chief ancient post excavator

Norway

4th Jul, 2007 at 09:00:14am

That's very rough, as the bore and stroke ratio is not the same on 998 and 1275s. The bore is important here, not the stroke.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

danboy

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Doncaster, South Yorkshire

4th Jul, 2007 at 09:23:49am

Based on a compressed thickness of 0.8mm and a gasket bore of 65mm at the fire ring you will find the volume is 2.655cc.
Regards
Dave
Home > Help Needed / General Tech Chat > head gasket thickness soz to be a pain with my questions chaps
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