Waterpump heater core block offs....

**98TransAmWs-6** · 10-31-2012, 09:26 AM

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.

**Spikito** · 10-31-2012, 09:34 AM

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.

**98TransAmWs-6** · 10-31-2012, 09:38 AM

Originally Posted by Spikito

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!

**Spikito** · 10-31-2012, 09:38 AM

http://4.bp.blogspot.com/_VOi5wRDLMK...Cor+Bypass.jpg

or something like this

**98TransAmWs-6** · 10-31-2012, 10:10 AM

Originally Posted by Spikito

http://4.bp.blogspot.com/_VOi5wRDLMK...Cor+Bypass.jpg

or something like this

The link doesn't work.

**Spikito** · 10-31-2012, 12:20 PM

**JayTA98** · 10-31-2012, 01:05 PM

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.

**98TransAmWs-6** · 10-31-2012, 01:32 PM

Originally Posted by Spikito

Thanks, I might get something like that.

Originally Posted by JayTA98

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.

**JayTA98** · 10-31-2012, 01:38 PM

Originally Posted by 98TransAmWs-6

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]

**98TransAmWs-6** · 10-31-2012, 02:11 PM

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

**JayTA98** · 10-31-2012, 02:19 PM

Make sure you pressure test it. Sometimes it looks fine but once pressure and heat build up it starts to leak.

**98TransAmWs-6** · 10-31-2012, 02:25 PM

Originally Posted by JayTA98

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?

**JayTA98** · 10-31-2012, 02:30 PM

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.

**98TransAmWs-6** · 10-31-2012, 02:37 PM

Originally Posted by JayTA98

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.

**JayTA98** · 10-31-2012, 02:46 PM

Originally Posted by 98TransAmWs-6

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.