Waterpump/T-stat?
Thread Starter
On The Tree
Joined: Jan 2004
Posts: 199
Likes: 0
From: El Paso, Texas, USA
Waterpump/T-stat? I just had the waterpump replaced under warranty. Even with my mods! 
The problem is that the waterpump is an '04 model. And the thermostat is different. The t-stat is seperate from the housing. I found out today after I tried to install my old 160* stat in the waterpump and it wouldn't fit. The waterpump opening is too small. I checked the stat with an old school model 160* stat and the openings were the same. It has a rubber gasket that fits on the stat. Can I use an old school 160* stat? Or can I modify the stat that is on there already? If so how? Drill two holes on it? My car is tuned for a 160* stat.
Thanks in Advance
Ever
The problem is that the waterpump is an '04 model. And the thermostat is different. The t-stat is seperate from the housing. I found out today after I tried to install my old 160* stat in the waterpump and it wouldn't fit. The waterpump opening is too small. I checked the stat with an old school model 160* stat and the openings were the same. It has a rubber gasket that fits on the stat. Can I use an old school 160* stat? Or can I modify the stat that is on there already? If so how? Drill two holes on it? My car is tuned for a 160* stat. Thanks in Advance
Ever
Last edited by 02WS6#519; May 13, 2004 at 10:25 PM.
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Thread Starter
On The Tree
Joined: Jan 2004
Posts: 199
Likes: 0
From: El Paso, Texas, USA
Good point. But too much of a hassle and down time on the car since it's my daily driver. I drilled two holes on the stat and the temps are hovering around 165*-175*. Is that ok? Or should I just install a SBC 160* stat? It fits perfectly.
Peace
Ever
Peace
Ever
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TECH Enthusiast
Joined: Oct 2003
Posts: 559
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From: Garden City, Michigan
I don't know the answer to your question - but apparently the GTO's have 2 different water pumps. At some point near the first 500 cars, they switched to the new housing.
http://www.ls1gto.com/forums/showthr...ght=thermostat
Dan
http://www.ls1gto.com/forums/showthr...ght=thermostat
Dan
I just had this exact same issue a while back.
Here's a few pics.. it can be done but probably not so easy while on the car nor would I recommend it. With a bit of the dremel it can be done.. no leaks here after a few thousand miles
Here's a few pics.. it can be done but probably not so easy while on the car nor would I recommend it. With a bit of the dremel it can be done.. no leaks here after a few thousand miles
nope.. never took a shot of that... The only thing that seemed very different is the width and angle of the two arms (sorry for lack of a more technical word) that wing out and around to the bottom of the stat. That's where the notches had to get smoothed out.
Thread Starter
On The Tree
Joined: Jan 2004
Posts: 199
Likes: 0
From: El Paso, Texas, USA
Here is a pic of an LT1 thermostat----->
Which looks exactly like the stat that came with the new waterpump. Exactly. So does that mean I can use an LT1 160* stat? They are both reverse flow, right?
Thanks
Ever
Which looks exactly like the stat that came with the new waterpump. Exactly. So does that mean I can use an LT1 160* stat? They are both reverse flow, right?
Thanks
Ever
Thread Starter
On The Tree
Joined: Jan 2004
Posts: 199
Likes: 0
From: El Paso, Texas, USA
I bought the LT1 t-stat and it wasn't the same as the '04. It was shorter. I guess I'll wait until they come out with the newer version. Or maybe modify it with the shims. I don't want to modify the waterpump like Johnny5.
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Ever
Peace
Ever
