Cooland Question - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-28-2003, 01:20 AM   #1
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Default Cooland Question

I filled the top coolant reservoir with the fresh cooland after I replace the water pump, but when I start driving, the temperature was too high.

I stopped the car and check the radiator. There was no coolant at all...!!!
I thought the coolant may be filled in the radiator when I fill in the top reservoir, but it isnt..
I filled the radiator and it works fine as of now.

Any body knwo why the cooland filled in the top reservoir can't be flown to the radiator after the water pump replacement?

My car drives well as of now.

But I 'd like to know if the coolant is circulating between the top reservoit, engine and the radiator well. HOw can I know ? or diagnosis?...

Please let me know...Thanks.
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Old 06-28-2003, 01:37 AM   #2
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the thank at the top is just an overflow.so u gotta fill the radiator too.at least i think thats the deal.someone else correct me if im wrong
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Old 06-28-2003, 03:07 AM   #3
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yea im assuming that when you took the pump out that most of the coolant drained out...(correct me if im wrong) so then when you got the new one on you have to fill the radiator first...best way to do this is to take the cap off...fill it until it goes to the top...turn on the car....let it run for a little bit and it should bubble and go down then fill it up again...then ( i think you can let it stay un capped for longer) but i put the cap on...drive aroundthe block...come back....turn off the car...pull the cap...fill it...start it...put the cap on...and then fill the the resevor to the proper line...and then i drive it for a while and check it again that night or the next day and fill to what is needed...that may have been your problem...
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Old 06-28-2003, 10:32 AM   #4
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Default Thanks Problem solved

Thanks very much.

I didn't know the coolant job at all. Fortunately I checked the radiator several times yesterday night and the the coolant temperature is normal as of now. I'll check one more time right a way. I thought the water pump i changed doesn't circulate the coolant at all. When I checked the coolant reservoir yesterday after a driving for a while, the coolant level was lowered than the first time when I filled it. Radiator is Ok. Temperature is Ok. It seems to me the motor doens't consume the motor oil....So. Everything is fine.

Thanks guys

I got a lot of help from you guyes. REally appreciated it.
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Old 06-28-2003, 11:16 AM   #5
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u gotta let the engine cool down before you open up the radiator, you got to remember that the system is under pressure, and possibilly over its boiling point at 1 atm, if you remove that pressure and it is over its boiling point at 1 atm it will flash into a gaseous state and that would not be good for anyone standing near... also, even if it is not over its boiling point it is still under pressure while up to temp. and it would not be a good idea to open it and release that pressure...
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Old 06-28-2003, 11:44 AM   #6
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Next time remember to "Bleed" off the air in the system by using the bleeder valve on the top of the T-Stat housing! This air was causing your high engine temperatures, at least to the gauge, as the air was trapped in the engine system & could not get out! Everytime, the system is openned up, you should bleed out the air that has entered the system.
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Old 06-28-2003, 02:01 PM   #7
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Default Would you tell me more about bleeding?

I found the small black cab top of the small pipe comming out from the radiator.
Is this cab for bleeding the coolant? I opened it but the air did't come out.

Would you explain how to bleeding?
Thanks.
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Old 06-28-2003, 02:01 PM   #8
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that makes some sense
seems that everyonce in a while my engine will seem to run a little hotter than i preffer, but that could be the air in there maybe then. because i check my coolant level every couple weeks or so.
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