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Viton Seals Question
Posted by: junkman ()
Date: October 26, 2017 09:15PM

I remember a while ago that some people were having leaking problems with the Viton crank seals. I am wondering if this issue was ever determined to be the result of the Viton seals, or was it user error? I remember at the time, the suggestion was to not use Viton on any moving part.
I installed the Viton seals in my 1962 engine when rebuilding it, but the engine has yet to go into the car. It will be a lot easier to replace them now, then later on. Also, what are your thoughts about using NOS seals, if they are still soft and pliable? Thanks Junk

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Re: Viton Seals Question
Posted by: rowin4 ()
Date: October 26, 2017 09:37PM

My experience with viton seals was in a ford automatic transmission. I Was towing a trailer without a remote cooler. Transmission started pouring oil out the front seal. After having it towed home , added 3 quarts of fluid and never leaked again. I didn't pull any trailers again though. I talked to a transmission shop about it and they confirmed that viton seals will not hold with extra heat. So with the Corvair I would change it out now to be on the safe side. Just my experience.

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Re: Viton Seals Question
Posted by: WalterElias ()
Date: October 28, 2017 04:10PM

I’ve been running a Viton crank seal in our UltraVan for over ten years now with plenty of heat due to the load with no leaking if that means anything. Granted, I’ve only put 10,000 miles on it in that time. I heard rumored that Viton isn’t really intended for a rotation sealing surface but I’ve not had a problem. Time will tell.

Dan Kling
1961 Greenbrier Deluxe, 110 HP, 4spd, 3.89 stump puller
1963 Spyder Coupe, restored, converted to 4spd Saginaw
1967 UltraVan #299, The migration has begun, we're on the road again......Save the Whales!

Photos of our Greenbrier, UltraVan and work-in-progress @

[www.flickr.com]

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Re: Viton Seals Question
Posted by: davemotohead ()
Date: October 28, 2017 05:20PM

I avoid Viton crank seal like the plague! Especially the bell housing seal you cannot replace without taking the engine out, In my experiences if you install 10 of them 8 will fail within the first 500 miles.





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Viton Seals Question
Posted by: gnrand ()
Date: October 28, 2017 05:33PM

I have in the past taken the seal tension spring out and separated it by turning it spring in opposite directions where they meet to form a circle. Then you can cut the female side and reattach ends to increase the tension. Be conservative on the amount you remove and test the tension frequently. Too much is just as bad as too little tension.
Jeff

Wildomar,Ca

1965 Corsa Hard Top
!965 Corsa Convertible
1968 Monza 140 Convertible 4 speed
1966 435 HP Crown
1986 Buick GN

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Re: Viton Seals Question
Posted by: davemotohead ()
Date: October 28, 2017 05:47PM

What I have found is the viton grabs the metal and shreds itself in short order, I have pulled a few out that looked like a rat chewed on them in 500 miles or less, I refuse to use viton on moving parts.





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Viton Seals Question
Posted by: junkman ()
Date: October 28, 2017 06:29PM

What is the opinion on using NOS seals? I have no shortage of them! They are still soft and pliable. What is the preferred seal for the best results of being leak free?

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Re: Viton Seals Question
Posted by: steve c goodman ()
Date: October 28, 2017 06:42PM

NOS if it is still a soft seal. Just my opinion of course.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: Viton Seals Question
Posted by: jwsargent ()
Date: October 29, 2017 08:19AM

What seal would you recommend?

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Re: Viton Seals Question
Posted by: davemotohead ()
Date: October 29, 2017 08:33AM

The black seals





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Viton Seals Question
Posted by: gnvair ()
Date: October 29, 2017 09:03AM

Love the NOS GM seals. I know the rear seals were made for GM by National

Lee J

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Re: Viton Seals Question
Posted by: solo2r ()
Date: October 29, 2017 10:54AM

I too have had leakage with viton crank and bell housing seals....just changed one out yesterday on a Customers engine!

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Re: Viton Seals Question
Posted by: WalterElias ()
Date: October 30, 2017 12:32PM

I feel lucky!! Gonna have to buy some lotto

Dan Kling
1961 Greenbrier Deluxe, 110 HP, 4spd, 3.89 stump puller
1963 Spyder Coupe, restored, converted to 4spd Saginaw
1967 UltraVan #299, The migration has begun, we're on the road again......Save the Whales!

Photos of our Greenbrier, UltraVan and work-in-progress @

[www.flickr.com]

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