LT1-LT4 Modifications 1993-97 Gen II Small Block V8

please HELP with 170 deg. thermostat

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Old Sep 20, 2006 | 11:27 AM
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dannyz28's Avatar
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From: west chester PA
Question please HELP with 170 deg. thermostat

i ordered a "Be Cool" 170 deg thermostat a few days ago from JEGS. last nite i put the thing in my car and i noticed that when i put the thermostat in the water pump it bottomed out before it was seated. so i figured i would try it anyway eventho the bottom of the spring on the thermostat was pressed againt the inside of the water pump... after the car was bolted together i took it out on the street and had my data logger running to see what the water temp was doing while i was driving. i noticed that at first the water was around 180 but it crept up to 204 before shooting back down to 180 again. this cycle happened a few times before i came home. oh, and this is with both fans running, by the way. i am thinking that the thermostat was opening around 204 instead of 170 since it didn't fit right in the water pump housing. has anyone else had a problem with aftermarket thermostats not fitting? where can i get a good one that will fit, and actually open when i want it to??
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Old Sep 20, 2006 | 11:30 AM
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is the thermostat for a reverse flow cooling system? what is the p/n you bought?
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Old Sep 20, 2006 | 11:50 AM
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i assume it is for the reverse coolant flow. the web site said it was for the LT-1. the part number is 78009
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Old Sep 20, 2006 | 12:07 PM
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just go to your local parts store and pick up a 160.... they are pretty cheap.. but something is wrong with it bottoming out before it seats... something is wrong with it...
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Old Sep 20, 2006 | 12:13 PM
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send it back and get a 160
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Old Sep 20, 2006 | 02:18 PM
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i looked at a 160 degree from the local parts store. they had one for "all chevy 350's"... it was the same outer diameter as the one i took out of the car, but the hole for the coolant to flow thru was much tinier than the stock one i pulled out. i didn't buy it because i was worried that it wouldn't flow enough coolant. what brands are you all running?
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Old Sep 20, 2006 | 02:27 PM
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Go to Auto zone and tell them at the desk you need a thermo they will ask the usuall things and bring them up on the comp they sell hypertech 160 degree 1s for about $17-19 they just have to order it that were i got mine from. Or call summit and order from them.
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Old Sep 20, 2006 | 02:39 PM
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cool. thanks for the input
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