Netters,
I had a pre-buy inspection done on my Cessna 152 and during the
compression check the mechanic found one cylinder was showing only 47
pounds. Another mechanic did something I have never heard of before. He
said that sometimes there will be a carbon buildup on the seal of the
exahust valve and cause it to not close all the way and seal on the
compression stroke as it is supposed to do. He took a large rubber mallet
and smacked the roker arms a few times after removing the cover of course
and now that cylinder is showing 74 pounds. Just a few strokes with a
rubber mallet was all it took to jar the carbon off of the seal. I could
see an expensive repair bill for grinding valves, replacing rings or
possibly the entire cylinder so I thought you guys aught to know about this
fix.
Bob Stone, Harker Heights, Tx
[email protected]
