measuring squish and threebond in place of gasket

[lazlokovacs]

Hi all,

Got a spare 1100 engine on the bench.

Squish measured at .070  -.074

optimum is .040 or so I've read

Means I can lose a bit of cylinder height

I measured the base gasket at .025

Can I use threebond in place of the base gasket?

And will it get my squish near enough, or should I be looking at milling the cylinders?

Cheers

 

[John A]

Yep, that's the "quick and dirty" way to do it and it works well. I used some flange sealant by Locktite but Threebond is good stuff too.

[lucian]

 Was the squish not in spec originally?  Did you measure with the head torqued down ?   Just curios.  Perhaps thinner head gaskets are available.

[lazlokovacs]

yes I measured with the heads torqued down

[lucian]

If you drop the cylinder be sure there is not excessive wear  on the bores or a ridge at the top of the piston travel. It is better to plane the head as it wont change the wipe area of the bores. I don't know what the spec is for squish on the 1100s but .070 doesn't seem extreme. I would run it see how it goes. Easy enough on a guzzi to pull the heads and plane them it you get a lot of pinging. ( detonation)