TH400 Oil Pump Bolts
Thread Starter
Melting Slicks
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Thread Starter
Melting Slicks
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
I've used a small cold chisel and crushed the OD of the seal, then hooked them out. Got to be careful to not chop up the ID of the pump. Later model GM trans (700R-4 and 200-4R), GM put a thin bead of Loctite around the seal. But those had problems with blowing the seals out until someone went in a drilled the drainback holes a bit bigger.
Thanks Tim.
Steve
Melting Slicks
Joined: May 2002
Posts: 2,431
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From: Florida
My final 2 cents. I use a chisel (old handleless screwdriver) and crush the outer diameter towards the pump stator then pop the seal out. Wipe the housing out with brake cleaner and put weather strip adhesive around the perimeter of the seal. Then using a small hammer I tap the seal in radially. Without a failure, I've installed literally hundreds of seals and never used Vaseline to help retain the springs but I see no harm in it. The pump bolt washers can be reused 90% of the time. They have some kind of black sealing material bonded to them and usually they remain in good condition.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Even with the Locktite around the seal, they are not hard to get out. When I build a trans I always check the drainback and put a thin ring of Locktite around the OD- never had one come out when I didn't want it to.
Thread Starter
Melting Slicks
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
This thread of mine pretty much closes this one.
Unbelievable.
https://www.corvetteforum.com/forums...post1595685761
Steve
Unbelievable.
https://www.corvetteforum.com/forums...post1595685761
Steve
Last edited by Cavu2u; Oct 2, 2017 at 06:12 PM.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Race Director
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Cool story and you know it's done right!!
JIM
JIM
