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how long should it take for a pt to reach operating temp?

 
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Old 11 May 2012, 07:28 pm
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Default how long should it take for a pt to reach operating temp?

i filled my coolant system and used the bleeder screw until i had a steady stream, started the car turned the heat to max and the fan off let it reach temp and thats where im worried . the car is reaching the half mark and opening the thermostat after a brief 4 minutes! i this normal? it is staying at the half but i have never seen a car hest up that quick. the heater was blowing nice HOT air. any help is welcome
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Old 11 May 2012, 08:03 pm
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Default Re: how long should it take for a pt to reach operating temp?

It may be a little short but I sure wouldn't worry about it unless it goes past the half way mark.

Let it sit for 10 minutes with the A/C on MAX and see if it sits at the half way mark. It should.
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Old 11 May 2012, 08:38 pm
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Default Re: how long should it take for a pt to reach operating temp?

Does take a bit of time with these small block engines. Mine takes oh maybe 6 to 7 minutes. I usually only give it a 2 minute warm-up then head out.
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Old 12 May 2012, 12:19 am
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Default Re: how long should it take for a pt to reach operating temp?

is there another way to test it i dont have a/c
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Old 12 May 2012, 01:46 am
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Default Re: how long should it take for a pt to reach operating temp?

My car, sitting at idle, will normally take about 5 minutes to reach normal operating temp depending on air temp. That's one of the things I love about this car, especially in the winter. My Sundance used to leave me freezing for about 10 miles or so!
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Old 13 May 2012, 12:28 pm
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Default Re: how long should it take for a pt to reach operating temp?

burped out the system again today took about a half a bottle of coolant again and still takes about 5 -7 min to heat up so i am going to keep a little extra coolant on hand and keep and eye for a day or two thanks guys
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Old 13 May 2012, 12:52 pm
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Default Re: how long should it take for a pt to reach operating temp?

Try this at your first oportunity---start car---let it reach operating temp---turn the heater on full hi temp for a minute, make sure you're getting hot air through vents---turn off car with heater still on---Let cool completely---open radiator cap and open bleeder valve--- leave valve open til solid stream is noted while adding any needed fluid during this bleeding process---close system back up. I realize this is probably the way you've already done it twice so far. Just wanted to make sure. If you have changed your t-stat lately, did you use one with the "jiggle valve" and if so, did you make sure to "clock" it correctly?

Also, do you get air that is just as hot with the heater at full blast while cruising, at say 60 to 70 as you do when idleing with the heater on full blast?

When was the last time you replaced the radiator cap? To keep the sytem functioning properly it needs to be at the correct pressure. If I remember correctly, the turbos cap is a slightly higher rated cap than the NA.

Jerry

Last edited by wwpptc; 13 May 2012 at 01:03 pm.
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Old 14 May 2012, 09:54 am
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Default Re: how long should it take for a pt to reach operating temp?

the thermostat is new and in properly and the radiator cap is original . i had been burping it the way you describe but i dont think it was warm enough the first time i did it
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Old 14 May 2012, 10:32 am
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Default Re: how long should it take for a pt to reach operating temp?

Jerry has a good point, the heater core can be holding air bubbles also, so if you want to insure you're getting all the air out, you need to run that heater. It doesn't actually have to be hot to run it, as long as you have it on, it's passing water through the core.
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