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12-02-2020, 11:42 PM | #11 |
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Re: Are there any GM Techs out there?
We have always put a hose loop so that coolant flows as the engineers designed it. It is almost easier to remove the exhaust manifold to get to the thermostat. We have put are temp gauge fitting in the flat spot by the hose outlets. There is a bolt holding the tube from the thermostat to the water pump, push the tube into the pump there is a o ring on it the twist and remove. Tom
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Tom Meyer 5240 SS Stock ??? |
12-03-2020, 08:16 AM | #12 |
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Re: Are there any GM Techs out there?
Tom, where did you put the "hose loop"?
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Billy Nees 1188 STK, SS Make tech "TECH" again! |
12-03-2020, 09:28 PM | #13 |
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Re: Are there any GM Techs out there?
We just looped the heater hoses using a u shaped formed hose with one 3/4 the other end is 5/8. We have been running these motors for the last 8 years, 4 IMCA national dirt championships and 4 UPs. Been to tech [top 4] about 600 times, one guy told me I brought to much stock / super stock mentality to the class. Tom
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Tom Meyer 5240 SS Stock ??? |
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12-05-2020, 05:28 PM | #14 | |
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Re: Are there any GM Techs out there?
Quote:
The coolant goes FROM the rear of the block and through the heater core. It then flows over the hot side of the thermostat and into the water pump where it circulates through the block and head. When the coolant flowing through the heater core and over the hot side of the thermostat gets hot enough, it opens the thermostat letting cold coolant from the radiator flow past the COLD side of the thermostat into the water pump( the thermostat really IS backwards!). Suction from the pump pulling cold coolant from the radiator (lower hose) lets hot coolant go from the top of the head (upper hose) into the radiator... This is as clear as mud!
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Billy Nees 1188 STK, SS Make tech "TECH" again! |
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12-05-2020, 08:23 PM | #15 |
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Re: Are there any GM Techs out there?
GM has standards for heater performance, so heating up coolant quickly so the heater provides heat to the passengers is a high priority . Included in that is they don't want to shock the block and heads with cold coolant ,so the special thermostat was developed . I believe its similar to the older LT1 style thermostat .
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