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  1. #1
    Join Date
    May 2010
    Location
    Muskoka, Ontario
    Posts
    428

    Default Thermostat gasket for assualt 325

    Anyone able to find an equivalent car gasket that works to replace the 2 bolt and 3 bolt gasket that go together on the thermostat housing? I found the gaskets online but all of them are in the US and shipping will be way more than the gasket itself. Not sure if this is a marine specific or theres a car version that works. I know you can use a 160 degree car thermostat not sure about the gasket. Anyone had any luck?

  2. #2
    Join Date
    Jan 2021
    Location
    Columbus, Ohio
    Posts
    1,412

    Default

    The 2 bolt gasket is a standard 5.7L GM 1996-1999 truck thermostat gasket.

    The 3 bolt is Indmar specific to the custom thermostat housing. You could get gasket maker material from the parts store and use the housing as a template to make your own.
    2015 Moomba Mojo Surf Edition
    4,000lbs
    Manual Flow

  3. #3
    Join Date
    Apr 2013
    Location
    Knoxville TN
    Posts
    3,280

    Default

    As @HoldMyBeer said, I've known people that made them for both cars and boats.
    Clean the area good before you reinstall so once you install it seals up properly > good to go.
    2018 Supra SL400

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