LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Would 160 Thermo cause no heat?

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Old Oct 9, 2007 | 02:35 PM
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Would 160 Thermo cause no heat?

I bought my camaro used and not sure what kind of thermo, if any the kid put in. I have low temp heat and troubleshooted it and it says i need a new thermo because the heater inlet is hot and the outlet is only warm. My question is, would a 160 degree thermo cause me to have no heat if the kid put one in. Or if i go to replace it and put a 160 in instead of the stock one, will that cause me to have no heat after i put it in?
Old Oct 9, 2007 | 02:48 PM
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160 only means that when the water reaches 160 then the thermostat opens and 160 is plenty to work the heater and defroster.
Old Oct 9, 2007 | 02:49 PM
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thank you pizza man.. any advantages to running a 160 opposed to a stock thermo?
Old Oct 9, 2007 | 04:22 PM
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When you say "no heat" are you referring to the heater or the engine?
Just curious.
Old Oct 9, 2007 | 06:25 PM
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heater
Old Oct 9, 2007 | 07:51 PM
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i still have perfect heat

sounds like you may have a plugged heater core
Old Oct 9, 2007 | 09:47 PM
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Originally Posted by Mtxz453
thank you pizza man.. any advantages to running a 160 opposed to a stock thermo?
Yes. Cooler temps generally mean that predenotation issues are less of a problem. Further, if more than stock timing avance can be taken advantage of, it helps there also.
Old Oct 9, 2007 | 10:00 PM
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Yea, no disadvantages to it.

Mine is HOT ... I had problems with it my heater and decided to flush it when I put the cam in. I was suprised how dirty it was. I flushed the radiator, heater core, and the block out with a hose and its crazy how much gunk was in there ...
Old Oct 10, 2007 | 12:25 AM
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yea i thought it was the heater core but half of my heater inlet house isnt hot until i shut the car off.
Old Oct 10, 2007 | 08:08 AM
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If the heater hoses are not hot, there is no coolant flow. The flow could be blocked by a plugged heater core. Plugged core is a very common problem.
Old Oct 10, 2007 | 09:04 AM
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I was going to ask if ya'll have gone back to the 180 because of low heater temps. I have to check the core now.
Old Oct 10, 2007 | 09:46 AM
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The causes for little or no heat are many. Bad stat, improperly installed stat, wrong stat, vents sticking, plugged core, leaky core, etc.

One that is often missed is low coolant. Just because the overflow is up to the marked level does not always mean that the system is full. If you have too little coolant, and since the heater is the highest point in the system, too little coolant may not reach the heater sufficiently to provide consistant heat. If you hear gurgling (often thought to be something rattling behind the dash) it just might be low coolant that is splashing up into the core on an inconsistant basis. The result being that the heat comes on, the temp gauge fluctuates, then the heat goes cool and so on. So make sure you have sufficient coolant before you start changing stats or any other invasive actions. And, of course, if your coolant is frequently low, then you need to have the system pressure checked for leaks.

Let us know what you find. JMHO
Old Oct 10, 2007 | 10:28 AM
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im pretty sure i have enough coolant, i cant add anymore through the radiator. See the wierd thing about the inlet hose is that its partially warm up until this metal bracket thing, then he rest of the hose is cool. However, as soon as i turn the car off it seems like coolant passes through there and it becomes hot like the outlet hose. Could there be air in my heater core or something? Yellow circle is where it does not get hot until after the car is started. Red part is hot, and i dont know what the blue circle hose is.
Old Oct 10, 2007 | 10:42 AM
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Have you attempted to bleed the air out of the system yet?
Old Oct 10, 2007 | 10:51 AM
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how do i bleed the air out of the system



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