|
The gas test
One thing I did on my rebuild that I have not seen here was the gasoline test. CAUTION: THE FOLLOWING IS DANGEROUS AND SHOULD BE DONE CAREFULLY.
When I took the head off of the engine I found that my number two exhaust valve was burned through. I thought that was the only problem. My dad, a mechanic, suggested that I pour gasoline into the cylinders and watch what happened. I turned the engine so that #1 was not TDC and tried it. I noticed that the gas stayed in numbers one and three, but ran right through number two. This indicated that the piston and or rings were bad. I could not have found this on a compression test because of the hole in that exhaust valve.
I pulled the pistons and noticed that there was a crack in number 2 from the bottom of the skirt to the top of the dome. I can only guess what would have happened if I had subjected this to full compression…
IF YOU DO THE ABOVE TEST MAKE SURE TO CHANGE YOUR OIL BEFORE YOU START YOUR ENGINE. YOU DO NOT WANT FUEL IN THE CRANKCASE WHEN YOU START IT UP.
|