Sometimes you can also get the same result by just starting the engine and letting it run a little. The tapping the valves method is of course easier if you happen to have all the plugs out and the valve covers off at the time.
Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Robert L. Stone Sent: Saturday, November 26, 2005 6:59 PM To: KR Builders Pilots Subject: KR> The Fix 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 rsto...@hot.rr.com _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
