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Transmission pan leak??
Posted by: masonfc ()
Date: March 20, 2017 01:38PM

1966 corvair pg tranny. When I stArt it up it has a really bad leak from the back of the pan looks like maybe from bolts it's like 4 streams leaking in same area like is forking off from bolts. Just replaced gasket man was flat

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Re: Transmission pan leak??
Posted by: curt ()
Date: March 20, 2017 02:53PM

Were the bolts torqued to spec?

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Re: Transmission pan leak??
Posted by: MattNall ()
Date: March 20, 2017 03:14PM

Check the tightness of the 4 Big bolts that hold the PG to the Differential...





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Transmission pan leak??
Posted by: masonfc ()
Date: March 20, 2017 04:19PM

I may have overtightened the bolts my torque wrench stop doing its job. I'll check diff bolts to but mess seemed to be coming from back of pan

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Re: Transmission pan leak??
Posted by: MattNall ()
Date: March 20, 2017 04:37PM

Never use a torque wrench on pans!! Hand tight with a nut driver is fine! Just snug!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Transmission pan leak??
Posted by: masonfc ()
Date: March 20, 2017 08:12PM

Ok I'll start over. This wouldn't have caused any damage would it?

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Re: Transmission pan leak??
Posted by: MattNall ()
Date: March 20, 2017 10:05PM

Naw...





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Transmission pan leak??
Posted by: masonfc ()
Date: March 21, 2017 06:34AM

great thanks!

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Re: Transmission pan leak??
Posted by: Wagon Master ()
Date: March 21, 2017 06:38AM

Gasket will definitely need replacing. Pan gasket surface will need checked with a straight edge and flattened as nessesary.

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Re: Transmission pan leak??
Posted by: corventure Dave ()
Date: March 21, 2017 07:33AM

What material is the pan gasket you installed?
Yes... the gasket can get crushed if the bolts are too tight.
I do as Matt said and tighten by hand.
I hate RTV Silicone gasket sealer. But I do use a small bead on both sides of the oil pan gasket. Just a small bead.
The surfaces have to be clean, oil free and dry for the RTV to properly adhere.

As for gasket material, I have found that the original paper gaskets do not seal well. The rubber Nitrile gaskets crush easily at lower torques.
I like the cork nitrile gaskets. Some venders sell these that are thicker than standard and these seem to seal the best.

Also, again like Matt said, check the transmission to Diff bolts.

smileys with beer

Corventure Dave

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Re: Transmission pan leak??
Posted by: masonfc ()
Date: March 22, 2017 12:37PM

Matt what size is the lower bolt for the differential to the transmission it has a five eights head and the passenger side lower bolt is missing.



Edited 1 time(s). Last edit at 03/22/2017 12:48PM by MattNall.

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Re: Transmission pan leak??
Posted by: MattNall ()
Date: March 22, 2017 12:46PM

Sadly I don't know.

I don't believe those are blind holes... just measure the driver's side for length. I imagine 7/16" x 1-1/4"?





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo




Edited 1 time(s). Last edit at 03/22/2017 12:49PM by MattNall.

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Re: Transmission pan leak??
Posted by: masonfc ()
Date: March 22, 2017 02:58PM

I had a 7/16x1-1/2 that fit just fine. No more pan leak!! Now just adjust my carbs and idle and I'll be on the road. Thanks!!

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Re: Transmission pan leak??
Posted by: MattNall ()
Date: March 22, 2017 03:14PM

Glad it was simple!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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