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Thu Sep 08, 2005 10:33 am

On the (6) 17mm case nuts, if I am using the self sealing nuts, I understand that the sealing plastic ring goes towardsthecase, BUT do I also use a flat washer or just the nut. Any Gaskacinch needed at all with these nuts? The idiot book is the only place I read that a washer is NOT used with these nuts, but I cannot verify it anywhere else.

Also, anyone prefer not to use these nuts? If you use the earlier nuts & washers, do you put your gaskacinch on both sides of the washer and threads too?

Thu Sep 08, 2005 1:15 pm

Greg

The best way to use those is with washer and the red side away from washer and use sealer under washer to case instead the red part of the nut. I have done it this way for years and never had a leak if some sealer gets on the threads then thats ok too. I used red silicon but gasgcich is good to.

GL
Gary

Thu Sep 08, 2005 1:58 pm

Those 19mm Wrench size case half seal nuts where actually designed to go towards the case against the washer.Its a "Seal Nut".Sometimes i think folks look at them like a Nyloc Nut but they are not like those in function.I do not use them however and i know many that don't either.I prefer the 17mm wrench size nut with a dab of sealer behind the washer.I have used the 19mm wrench size Nyloc nuts that come in a lot of hardware kits also.
I do use the 8mm seal nut on my oil pump cover,seal to the cover and those work great.I've had to show this to some folks in the Robert Bentley manual that had been putting the on backwards for years. :wink:

Thu Sep 08, 2005 3:40 pm

Those self sealing 19mm nuts for the case half were only made for early cases that don't use case half o-rings. On the later cases, the o-rings prevent oil from leaking, not sealant that you use under the nut. But to answer the question, you use no washer and the red sealant goes towards the case.

Fri Sep 09, 2005 5:54 pm

Thanks all for the feedback. I went into JT Garwood's book and read that in 1971 VW introduced the self healing nuts and did away with the washers. Comparing JT's book to progressive refinements, it is basically the same info formatted into readable form. However, my progressive refinements stops at '67 - so I cannot compare the two in 1971 for a double check.

SO . . .can I use them on my 40 horse case or not? I do not have the case washers to use, so I'll have to find some if I go without the sealing nuts. The washers in the BugPack hardware kit I bought do not fit into the recesses on my 40 case. (I know the BugPack nuts are only nylock and not self sealing - I bought the self sealing units separately)

Sat Sep 10, 2005 6:31 pm

Be advised using those seal nuts will also give false torque readings just like any lock nut with measureable resistence... You need a free spinning fastener to achieve proper torque values........... Is this important to you???

Jim-

Sat Sep 10, 2005 6:39 pm

It's not that important to ANYONE. They don't affect it that much.

Self sealing nuts are good where you might get leaks. With the O rings in place in the 6 studs, and the case sealant, you're not likely to see leaks. The oil pump is about the only place I use them, due to the high pressure there. I never use them anywhere else and I don't see leaks.

Sun Sep 11, 2005 3:36 pm

"[email protected]" Had the correct answer. We always apply a little sealer under the head washers also as they can weep, they won't leak but on a show motor the weep will attract dirt. If the sealing surface is against the washer the design of the sealing nut is defeated. Sealing oil pup nuts are great to use next to the cam tunnel on the flywheel end. Most new builders don't know that the small paper washer in the gasket set was made to seal this spot, the self sealing oil pump nut just does a better job. Oil Leak How to find leaks & stop them <> http://www.1800vw.bizhosting.com/oilleaks.htm

Tue Sep 13, 2005 1:01 am

So I went with the regular nuts and washers on the 6 case studs, and treated all surfaces to Gaskacinch.

vicsvw - If I used wave washers and Gaskacinch on those 2 14mm nuts at the rear of the cam would I be better off removing and using the paper gaskets, or finding the self sealing nuts for those? Do the gaskets get used with washers, and if so I pressume they go between wahser and case?

My supplier did not have 6mm self sealers for my oil pump (40 horse, small studs) so I used wave washers and high tack on the studs / washers.

Tue Sep 13, 2005 8:00 am

Yes the gasket will go under the wavey washer. Better yet use the self sealing nut without the wavey washer. We save our old self Sealing nuts from the Oil Pump Cover for this location. Trmember the sealing surface goes toward the case. Vic.
6mm Selfsealing nut are available -> http://1800vw.bizhosting.com/oil_pump_covers_etc_.html

Tue Sep 13, 2005 8:35 am

Would those 2 nuts still torque to 14 ft/lbs or less with the self sealing nuts?

I know the large case nuts only got to 18 lbs with the sealing nuts, but 25 lbs with normal nuts.

Thanks for all the great info!

Tue Sep 13, 2005 8:57 am

We always torque them the same, but we are always using the used ones from the Oil pump cover. To be safe torque them a few extra lbs and then loosen and torque to the 14# These are torqued the same time the 6 case bolts are torqued. Have a great Day. Vic