|
Question for Wayne
Wayne, I am building a 2.2S Motor and have several questions from your book which I am following on this rebuild.
1) Regarding the O'ring around #8 nose bearing. Your pictures show installing this dry and you mention a concern about oil contamination from O'rings on the oil pump to the case seam. Can you comment a little more on this? I think this is a critical area regarding oil leakage and want to do it right. What is the best practice for this O'ring and the oil pump seals? I am wondering why you recommend Curil-T for the nose bearing seal and the flywheel seal and not the #8 o'ring, through bolt O'rings or the oil pump seals.
2) Regarding case sealants: There are several very well respected Porsche engine builders around here that refuse to use Loctite 574 from bad past experience. I also have had very poor luck using Loctite 574 in the three prior engines I have built, all resulting in oil leaks at the case seam. Loctite 574 is also very difficult to clean off after it has cured or if an engine has to be rebuilt. I have been recommended a case sealant called Drie-Bond that I'm told, Porsche recommends for the Boxter engine case seam. It is available from my local Porsche dealership for $20 per tube which is enough to do one rebuild. Have you heard of it? Any comments?
3) In figure 3-23, you mention that Loctite 574 will wash itself from the circular oil pressure relief groove noted in fig 3-22, or anywhere there is not a metal to metal bond. On a recent tear down (I suffered the infamous Mag case crack behind the flywheel, left case half) the circular oil pressure relief grove was totally blocked with hardened Loctite 574. Is this a critical thing, keeping this oil pressure relief groove clear of sealant?
4) the factory manual recommends assembling the oil pump and intermediate shaft into the right case half before you drop in the crank assembly. Why is it better to do it the other way around as you recommend in your book?
Thanks, and by the way, I think you have done an excellent job on your book! In our world of high priced Porsche parts, it is an incredible bargain!
JB
|