BJ42 1982 3B engine gasket measure (6 Viewers)

[meris]

Hello,
We have encountered a problem. We have a BJ42 1982 3B engine. The inside of the cylinder liner is 102 mm, the outside ring is 105 mm, and the gaskets are only 106.8-107.5 mm. We have a 1-1.25 mm gap around the circumference. Will the gasket expand when the head is pressed and fill the 1.5 mm gap?

 

[45Dougal]

It probably won't, but does it matter?
So long as it seals, then it should be fine.
The increased combustion chamber volume is trivial - what's your worry?

 

[meris]

It is worrying because on engine B the gasket fits almost without any gap, while here on 3B there is such a large gap. This is a photo of another engine I am restoring, B.

 

[rlong]

“Seems” wrong. As 45Dougal points out will probably not hurt performance, but I would at least want to call a different supplier and have them measure a different head gasket.

 

[-MaTTi-]

It is worrying

Use only OEM Toyota head gasket. You’ll have problems with aftermarket ones.