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Stupid Water pump question!?

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Old May 26, 2009 | 09:28 PM
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Default Stupid Water pump question!?
Which port on the water pump is "in" and which is out? trying to hook up my hoses on my Ls1 swap, which hose goes to the top of the radiator and which goes to the bottom?

i am having a brain fart!
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Old May 26, 2009 | 09:40 PM
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top goes to top, bottom goes to bottom. simple.

The same way your modular motor was setup...
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Old May 26, 2009 | 09:41 PM
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I figured as much, but figured I'd ask.

ANyone know if they make a "straight" thermostat housing? so the fitting comes out straight vs hard 90 to the right?
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Old May 26, 2009 | 11:24 PM
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I didn't find anything either so I made my own...

Uses a two-piece style '05-up thermostat. I milled it to 1-3/4" hose size since the mustang radiator uses that size.



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Old May 27, 2009 | 06:10 AM
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most older engines had the thermostat in the top, or to the radiator, the LS uses the bottom hose, or "in" to the motor for the thermostat-one thing i found was you gotta pour water into the top hose to fill the engine if running a t-stat, since the t-stat will be closed untill it heats up, water wont flow into the motor, so filling from the top will allow water to get behind the t-stat
this drove me nuts when i first fired mine up, lol
nice machine work on the housing
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Old May 27, 2009 | 08:13 AM
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Originally Posted by serpentnoir
I didn't find anything either so I made my own...

Uses a two-piece style '05-up thermostat. I milled it to 1-3/4" hose size since the mustang radiator uses that size.



very nice,want to mill another one? or do you have a CAD drawing I can use to have one milled?
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Old May 28, 2009 | 02:11 PM
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Could you please use AN washers under the bolts though...that drives me crazy to see regular size washers on that nice machine work...lol
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Old May 28, 2009 | 03:03 PM
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This is the one I got from CSR. It uses a standard small block Chevy thermostat. There are several recent threads on the topic. Try a search to find them

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Old May 29, 2009 | 11:36 AM
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Originally Posted by eric1h
very nice,want to mill another one? or do you have a CAD drawing I can use to have one milled?
I took measurements of the thermostat and pump and drew up a sketch. Took it to work and milled it out of scrap piece of 4" billet. Then I cut the oval base on a band saw.

I can post the sketch and you can take it to a machinist. It's a pretty simple part. Just a lot of scrap when starting with a huge billet.

This is my first machining project ever. It turned out ok.
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Old May 30, 2009 | 01:27 AM
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Originally Posted by serpentnoir
I took measurements of the thermostat and pump and drew up a sketch. Took it to work and milled it out of scrap piece of 4" billet. Then I cut the oval base on a band saw.

I can post the sketch and you can take it to a machinist. It's a pretty simple part. Just a lot of scrap when starting with a huge billet.

This is my first machining project ever. It turned out ok.


"Turned out ok" he says. Hahaha. Thats hilarious. Its gorgeous man, take a bow. Start up mass production of it now.
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Old May 30, 2009 | 01:28 PM
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Default housing drawing
Here is the sketch. This is for a late model LSx 2-piece thermostat.

Although this wouldn't pass QS9000 it's good enough for a machinist to make.

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Old Jun 2, 2009 | 08:56 PM
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I went with the CSR water inlet and picked up a 160 degree thermostat from autozone. Car i used to find it was a 1989 Camaro with a 302, fit PERFECTLY
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