160* Thermostat for 99 LS1 won't fit?
09-01-2008, 11:19 PM
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160* Thermostat for 99 LS1 won't fit? Just was wondering if the thermostats from 98-2002 were all the same for the LS1's. Just picked up a 160* Thermostat from Hypertech and it won't fit in my 99 Trans Am. I took my factory one out and the thermostat just pops out of the elbow and has narrow clips that hold the thermostat. The Hypertech one has alot wider clips that hold the thermostat and it wont even go into the housing on the engine. Its about 1/4-1/2" too wide but the part numbers say it will fit the car. Any Ideas? I wil also load up pictures.
09-01-2008, 11:25 PM
#2
Sounds like you have an LS2 pump on your car.
I ran into the identical problem on a car last month (2002 Fbody), and come to find out it had the pump replaced with the newer LS2 unit. If your thermostat is a two piece, then you have an LS2 pump & stat. Summit sells the stat for around 20-30 bucks I believe.
I ran into the identical problem on a car last month (2002 Fbody), and come to find out it had the pump replaced with the newer LS2 unit. If your thermostat is a two piece, then you have an LS2 pump & stat. Summit sells the stat for around 20-30 bucks I believe.
09-02-2008, 01:58 AM
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yeah it really does suck. pulled of the thermostat and had coolant all over the place. went to put the other one on and doesn't fit. Now car is sitting in the garage until I get the LS2 Thermo.
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09-02-2008, 12:30 PM
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I got one of those hypertech 160's it didnt fit with the housing it came with I guess so my buddy just stuck it in the stock one and it worked I think thats what he did
09-19-2008, 02:52 AM
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can anyone tell me what the benifits of going from the stock t-stat to a 160 stat in a 99 ls1 would be? just picked a 160 stat up but not to sure if i wanna put it in. thanks
