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 > > > >
