my engine rebuild

[68'911]

i thought i would give you guys an update on my 68 engine rebuild. long story short is that we found that the cylinder that we knew had no compresion has a hole in the piston. the rod is not broken and it kinda looks like burnt piston like you would see on an engine that had a little too much No2. we are obviosly going to have to replace it.

we were thinking that our engine has non-stock pistons because they are domed but we can't really remember what stock ones looked like. a pic or discription of stock ones would be very helpful.

i'll try to get some pics up of the hole in the piston.

any theories of what happened?

[roblav]

1968 911's have domed pistons - all 2.0 liter 911 engines do. A holed piston is due to too much heat - usually ignition timing too far advanced, poor fuel, lean mixture, or someone lugging the engine. The early engines suffered from poor flame propogation because of the high dome.

[68'911]

thanks for the info.

[scargo70]

up to what date(years) did the dome pistons last?