Hi All,

I would like to ask if someone can help me how to get the correct head gasket thickness with the below engine specs:

• Head Measure: 137.4
• Bore: 91.33
• Crankshaft bearings : 0.25
• Pistons rings: 0.25

If someone can help me i really appreciate it.

Thanks.

 

if you mean to achieve a particular compression ratio then only the head thickness in the above list is significant (the overbore will make a minor difference).
you also need to know the volume above the piston at TDC and the combustion chamber volume in the head, which, if its a 2wd head at that thickness, will likely be around 45cc.

1) determine the desired compression ratio and work out the required CC's to achive this (= REQVOL)
2) add together the volume above the piston in CC's and the head's combustion chamber volume in CC's to get value Z.
3) subtract Z from REQVOL and the remainder is the volume of CC's required in the gasket.
4) each miilimetre of gasket thickness will add another 6.5CC