Anybody Use this Stuff?

[KTL]

Another fella posted this question in the regular 911 Tech. Forum and I had been meaning to post this question myself:

Loctite vs Permatex equivalency

In short, is this stuff similar to the tried-and-true Loctite 574 orange goo?

http://www.permatex.com/auto/autouh.asp?automotive=yes&f_call=get_item&item_no=51813

[ChrisBennet]

Originally posted by KTL
Another fella posted this question in the regular 911 Tech. Forum and I had been meaning to post this question myself:

Loctite vs Permatex equivalency

In short, is this stuff similar to the tried-and-true Loctite 574 orange goo?

http://www.permatex.com/auto/autouh.asp?automotive=yes&f_call=get_item&item_no=51813

I've used the Wurth version of 574 for the last motor I did. (No leaks!). A friend gave me a bottle. Before I used it I asked on the engine forum and and got a good answer. See this thread: Orange sealant: Wurth=Loctite?

Loctite/Pematex 518 is a much thicker sealant. I use it for cam towers but I've never used it for a case. The idea makes me a little nervous. I do know of a shop that does use it for 911 cases so it's not unheard of.
-Chris

[KTL]

Thanks for the double reply Chris.

Always good to know what alternative products there are out there.

So we have:

Dow Corning 730 RTV
Loctite 518 or 574
Permatex Anaerobic Sealant
Dirko
Wurth Stuff

Many to choose from.

[MotoSook]

According to the MSDS of the 518 and 574, the 518 seems to have better shearing and thermal properties. Maybe I read it wrong as I'm suppose to be "working!" The recommended use is the same for 518 and 574.

[Wayne 962]

Is there something inherently wrong with the 574? Usually people seek out and find alternatives when the original product doesn't work as expected, or is too expensive. In this case, the 574 is neither - I can't figure out why so many people want to find alternatives?

-Wayne

[KTL]

Wayne,

I don't think anybody's looking for an alternative because they find the 574 inadequate. I think the questions about alternative sealants arise from the local availability of the alternative?

Could just be curiosity too..........

[HawgRyder]

If the problem sealing the case is too bad...just groove and "O" ring the case halves.
Bob

[Wayne 962]

Originally posted by HawgRyder
If the problem sealing the case is too bad...just groove and "O" ring the case halves.
Bob

????????????

-Wayne

[MotoSook]

I thought about that too Bob..why the heck didn't the facotry just machine a grove for a long strip of viton or something? It' doesn't even have to be on continuous piece, as long as the ends of the seal met at the top of the case..with a little goop to help the ends.

A good maching shop should be able to do that.

Of course, the o-ring probably would not have provided a good seal as long as some of our engines have been around. And like Wayne said, why try to improve on somethign that works good enough.

[HawgRyder]

Some aircraft engines were done this way....and I have taken apart engines that have been in semi-continuous use through 40 years with no evidence of leaking.
I admit the o ring idea is drastic...involving machining the case...but it can be done with a guide device and an upright dremel tool.
I have done harley cases (at the cylinder spigot) this way....it works.
Bob

[Wayne 962]

It's a solution looking for a problem? These engines don't leak when they are assembled correctly, and when the case mating surface is clean. Dirty parting lines = number one cause of leaky engines...

-Wayne