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Tandy, Here is my standard rap on valve sticking: > >After the last valve sticking episode in mid-1990 I had my mechanic >ream out all four exhaust guides in place (drop the exhaust manifold, tie dental floss to the >valve stems, drop them into the cylinder, ream out the guides, and pull >the valves back into position). For all I know that might have fixed >the problem, but being paranoid I use both TCP and MMO religiously. I >also use one can of AVBLEND after each oil change. (In addition the >last source of 80oct disappeared about 5 years ago so now I have to use >100LL). > >AVBLEND and TCP are available from aircraft supply sources (do a google >search for "alcor tcp" and "avblend"): > >http://www.chiefaircraft.com/cgi-bin/air/hazel.cgi?action=serve&item=/Air cr aft/OilSystem/OilAndAdditives.html - AVBlend > >http://www.alcorinc.com/DOCS/1/tcp.html - tcp info > >Unfortunately TCP is considered a hazardous material to UPS and is >expensive to ship - it is worth calling Alcor and asking them if there >is a local source. A one quart can treats 300 gallons - you have to >buy the dispenser (big hypodermic) to measure it. > >MMO is available at any auto parts store. I buy it by the gallon. You >put >4 oz in 10 gals of gas. Note the other two items are FAA approved, MMO >is not. > >I bought a 1 pint, 2-cycle mixing/measuring plastic container (probably >at a boating or auto parts store) that makes measuring out MMO in oz >very easy. >I keep the TCP and its dispenser in a 1 gallon zip lock bag in the >baggage compartment with the MMO plastic container and add both at each fueling. > >As I said the last time I had a valve stick was over 10 years ago and I >only run 100LL now. I do not know if I fixed it by reaming the valves >or if the AVBLEND, MMO and TCP make the difference but I am not about >to find out. I did pull my plugs with about 25 hours on them from last >annual a few weeks ago (I had a bad run up and found a broken >insulator) and they looked pretty good with only minimal deposits. So >hopefully what I am doing works. (And as I said I carry tools to fix a >not too stuck valve with me now.) > >Good luck > >David ________________________________ From: Tandy Allen [mailto:[EMAIL PROTECTED] Sent: Saturday, December 04, 2004 11:24 AM To: Ercoupe Technical Discussion Subject: [COUPERS-TECH] Sticking Valve Short of pulling the cylinder and having the valve hole reamed and the valve itself cleaned or replaced, what is recommended? I have been using Marvel Mystery oil in the gas and some in the oil since I have owned N93820, a 1946 415-C. Tandy _ ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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