Loc: Yorkshire, England
01-10-02 06:07 PM - Post#3860
In response to nsacco
Thanks very much for the advice everyone.
The reason I think it was some carbon going down the side of the piston is the fact that there was a chunk missing and an oval shape about 7mm by 5mm of shiny piston visible.
When I hold the engine to my ear and turn it by hand, I can actually hear air moving from one side of the piston to the other. When I get the 'pop' from the exhaust, it is the piston vacuum being released (from the downward stroke) - I assume this is not normal.
I removed the liner and tried smoothing the grooves with some very fine emery cloth. It has not made it much better however.
Anyhow, I have ordered a new engine, and I will repair this one in slow time or use it for spares for the new one.
Thanks again everyone