From: | John Faraci | e-mail: | thevetteshop@aol.com |
Subject: | RE: RE: RE: RE: Exhaust valve stem lubrication | Date: | Fri Dec 7 21:12:41 2012 |
Response to: | 4413 |
Guys, Thank you all. I typically use Torco assembly lube when building an engine. I was thinking of a super lube for the harsh conditions that the valve stems have to live with. I do like the hard chrome stem idea ! I have been doing some research with lubes from Schaeffer. They have some high temp moly graphite synthetic greases that might do the job for the one time lube. Their extreme temp grease can withstand 900F ! If anyone is interested, I can post some links. ----- ORIGINAL MESSAGE FOLLOWS ----- Mark, do you have a source for Hendrson valves with hard chrome stems? ----- ORIGINAL MESSAGE FOLLOWS ----- John, We used type 40 or G2 cast iron. we ran our exhaust guides the same as Dave Molnar, .004. Intakes at .003. This is a little tighter than normal and tighter than Henderson specs which I believe are .006 exhaust and .004 intake. Whatever you do, you have to run a hard chrome stem valve. That is the key as there is no real good lubrication. We also did periodically paste the valve stems with bell ray engine assembly lubricant. We suffered no issues whatsoever with valves. If you want to check out some exotic valve guide material, MS 90, go to the Cannonball website and read through my blog postings. This is the stuff that i will be using from now on. It is expensive but it allowed us to tighten things up even more. Remember, you've got to use a hard chrome stem. ----- ORIGINAL MESSAGE FOLLOWS ----- John, Are you talking about initial assembly? If so why not use an assembly lube available at most speed shops or even Heaven forbid your local Hardley Ableson shop? Mark and others must know the perfect formula. Do you have cast iron guides and Kibblewhite? valves? Old school is white assembly grease. ? What did the cannonballers use? ----- ORIGINAL MESSAGE FOLLOWS ----- Do you guys have a recommended grease to use when assembling exhaust valves in the guides? A lot of heat and no lube is not a good thing. |