Can't say who, but there's a pretty successful boutique engine builder that uses the same stuff the Yamaha factory racing team uses between the cases. Available at the Yamaha dealer.
----- Original Message ----- From: WILLIAM BIGGS To: [EMAIL PROTECTED] ; Hartmut Beil Cc: [email protected] Sent: Monday, May 19, 2008 8:45 AM Subject: RE: [ercoupe-tech] engine rebuilding What ever you do, do NOT use RTV or silicon. It has been known to squeeze out and the hardened globs come loose and clog the oil pump. There was a service bulletin on this years ago. I use the "aviation" permatex non-hardening you can buy at auto supply stores. I use the silk thread (get it from your doctor, it is used for stitches) and also use a light coat of permatex on the cylinder flanges and o-rings, and all other gaskets. Makes for a very dry engine. Bill A&P-IA ---------------------------------------------------------------------------- To: [EMAIL PROTECTED] CC: [email protected] From: [EMAIL PROTECTED] Date: Sun, 18 May 2008 18:45:05 -0500 Subject: Re: [ercoupe-tech] engine rebuilding When we did the major overhaul of my engine, in Nov 2006, we followed the "1963" method - Permatex and silk thread. Works fine. Eliacim > Here a question for you engine buffs. > > When putting the case together Continental originally just mentioned a > "sealing compound" to use. > > From the rebuild manual printed 1946: > > "Put a very thin film of sealing compound on the contact face of crankcase > No. 2-4..." > > No mentioning of a silk thread. > > That is added in the manual dated 1963: > > "...spread a thin, uniform film of Aviation Permatex ...." > and further down: > "... When the Permatex becomes tacky place a strand of No.50, Grade A silk > thread along the upper, lower and front flanges of the no. 2-4 casting... > > > The latest instruction from Continental SIL99-2B goes a more sophisticated > route: > CRANKCASE SEALANT AND > > THREADING PROCEDURE > > 2. Apply Permatex Number 3D to the 2-4 case half. > > Apply Permatex only in areas where thread is > > shown. .... > > 3. Apply a thin translucent coat of TCM Gasket > > Maker P/N 646942 not to exceed .010 inch thick > > to 1-3 case half. Apply Gasket Maker in all > > areas that will mate with areas where > > Permatex was applied on 2-4 case half except the > > through bolt bosses. > > 4. Apply and position grade D silk thread P/N > > 641543 on case halves as specified in Figure 1. > > Be sure free ends of thread are covered by > > gaskets except at the nose oil seal. > > 5. Clean crankcase crankshaft front oil seal land > > with Locquic Primer "N" and apply an even coat > > of gasket maker. > > > Today Continental wants us to use two different kinds of Gasket paste, one > on each half plus GRADE D silk. > > That seems to me a slight overkill. > > I used to put beetle engines together and we just used some silicon > compound. That works perfect. > > However in aviation, things seem more complicated. > > So 3 different types of seals. > > Now my question: What is everyone else using? What is the opinion about > the latest Continental specs? > The named Continental Gasket maker compound - what is that actually? > > > Hartmut > > > > ------------------------------------------------------------------------------ Change the world with e-mail. Join the i’m Initiative from Microsoft.
