Quote:
Originally Posted by Lapkritis
You're a bit crossed up on your facts.
Facts:
1) The chart isn't from another manufacturer. It's from DOW... Who manufactures DC55. Go figure!
2) DC55 reduces tensile strength of viton by nearly 50%.
3) DuPont Krytox GPL-207 is inert and birthed the mil spec.
4) This information wasn't provided in this forum until I brought it up. This is then "new" information as of nearly 3yrs ago now.
5) The sharp edge of the thread on the bolt is present in the joint, even with chamfering of the case.
6) Henry, and this thread, recommend DC55 without mentioning the requirement of machining the case. (Opinion alert: I believe this fact is a problem).
7) Krytox GPL-207 which I suggest as alternative and doesn't reduce the strength of the o-ring.
If you don't find use in facts it doesn't mean others won't. Some people still voted for Clinton after all.
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Lapkritis,
A small chamfer on the block keeps the o-ring from being forced/crushed into the threads by the chamfered washer. AND it can also help to prevent the o-ring from being crushed by the washer, causing it to come out the side as seen in the other thread "
Your opinion wanted. Green bolt through viton o-rings with rtv. The o-ring has a tendency to walk itself out; this helps keep it in place.
I too have used Henry's sealant methods for rebuilding my own engine.
I really appreciate the fact that he shares, what I would consider, trade secrets.
The fact is, most of us folks on this forum, are newb's at this.
If Henry said, "Ya, just use some peanut butter instead". LOL!
A lot of us would probably say "Oh wow! So what brand should we use!"
No questions asked!
Henry has a lot of experience, and most of us look to that.
We can't
afford to necessarily try new ways to do things.
We just want to get it done right the first time.
It might sound pathetic, but it's a fact.