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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => LT/LS Swaps => Topic started by: Stewart G Griffin on March 11, 2024, 07:09:07 PM

Title: Changing waterpump:
Post by: Stewart G Griffin on March 11, 2024, 07:09:07 PM
All the videos i've seen so far is basically putting new gaskets and just bolting the new pump onto the block.  Of course, you have to get the old  gaskets completely off the block.   But what i'm trying to ask is that it seems with small block you have to use sealant on the gaskets, but with LS, you just put new gaskets on and that's it?


Title: Re: Changing waterpump:
Post by: Mr Diesel on March 12, 2024, 07:14:12 AM
I can't speak to what factory did with LS, but with any paper gasket that seals a water passage I ALWAYS use a thin layer of blue RTV. Always had good success with that.
Title: Re: Changing waterpump:
Post by: Rapid Roy on March 12, 2024, 09:11:56 AM
My Dad was a Mopar mechanic in the 50's and 60's. He always coated gaskets with grease. That way if it needed to be replaced later, then gasket came off easier. I still do the same thing and have never had a gasket leak. Also, the gasket was held in place when installing.
Title: Re: Changing waterpump:
Post by: Captkaos on March 12, 2024, 09:36:37 AM
SBC/BBC I usually use a small bead of silicone on the pump side to retain on the pump for install/removal.  (heard grease used, I just never did)
LS motors use o-ring gaskets and they are typically resuable for a couple times.
Title: Re: Changing waterpump:
Post by: VileZambonie on March 12, 2024, 05:59:12 PM
Don't use grease or Vaseline on rubber seals and gaskets, use Sil-glyde instead. If you are dealing with imperfections, use Permatex (the right stuff) avoid the blue goo.