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Waterpump heater core block offs....

This is a discussion on Waterpump heater core block offs.... within the General Help forums, part of the LSx Technical Help Section category; I deleted my AC and I was wondering what people have used or seen used to block off the heater ...

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    Moderator 98TransAmWs-6's Avatar
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    Waterpump heater core block offs....

    I deleted my AC and I was wondering what people have used or seen used to block off the heater core ports on the waterpump.
    1998 Trans Am WS6 - Phantom
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    James Bond Spikito's Avatar
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    you want to allow the coolant to still travel, so you cant just block off the ports....generally people just use a piece of the factory plumbing and route one port over to the other.

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    Quote Originally Posted by Spikito View Post
    you want to allow the coolant to still travel, so you cant just block off the ports....generally people just use a piece of the factory plumbing and route one port over to the other.
    Ah okay thanks!

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    James Bond Spikito's Avatar
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    Quote Originally Posted by Spikito View Post
    The link doesn't work.

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    James Bond Spikito's Avatar
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    Senior Member JayTA98's Avatar
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    the only problem you might encounter if you are doing a bypass is that the outputs from the water pump are two different sizes. You might have to make a reducer. If the hose is close enough you might be able to crank the clamps down to seal good.

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    Quote Originally Posted by Spikito View Post
    Thanks, I might get something like that.

    Quote Originally Posted by JayTA98 View Post
    the only problem you might encounter if you are doing a bypass is that the outputs from the water pump are two different sizes. You might have to make a reducer. If the hose is close enough you might be able to crank the clamps down to seal good.
    Mine appear to be the same size or just barely a different size.

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    Senior Member JayTA98's Avatar
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    Quote Originally Posted by 98TransAmWs-6 View Post
    Thanks, I might get something like that.



    Mine appear to be the same size or just barely a different size.
    I have replaced 2 water pump and the ports of the water pump had been different sizes.
    This is a pic of the heater core hose assembly. This is from the middle metal piece[IMG][/IMG]

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    I'll look again then and see if I can just crank the hose down.

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    Senior Member JayTA98's Avatar
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    Make sure you pressure test it. Sometimes it looks fine but once pressure and heat build up it starts to leak.

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    Quote Originally Posted by JayTA98 View Post
    Make sure you pressure test it. Sometimes it looks fine but once pressure and heat build up it starts to leak.
    How do I do that?

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    Senior Member JayTA98's Avatar
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    You either buy a tester kit or rent one at the auto parts store. You connect the adapter were the radiator cap goes and using the hand pump pump it to the psi rating on your radiator cap. If you don't have a leak the pressure will hold. If the gauge goes down some then there is a leak somewhere. You have to be careful to not over pressure it.

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    Quote Originally Posted by JayTA98 View Post
    You either buy a tester kit or rent one at the auto parts store. You connect the adapter were the radiator cap goes and using the hand pump pump it to the psi rating on your radiator cap. If you don't have a leak the pressure will hold. If the gauge goes down some then there is a leak somewhere. You have to be careful to not over pressure it.
    Does the radiator need to be full or can it be empty? Mine is empty ATM.

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    Senior Member JayTA98's Avatar
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    Quote Originally Posted by 98TransAmWs-6 View Post
    Does the radiator need to be full or can it be empty? Mine is empty ATM.
    It needs to be full so you can see the coolant leaking. It could be done empty but i never done it like that. i would read the instructions of the tester you get. I think you would need more pressure than the radiator cap rating to fill the system.
    Last edited by JayTA98; 10-31-2012 at 03:48 PM.

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