View Full Version : Coolant overflowing????


kevins2000LS1
04-18-2007, 08:39 PM
I turned my car off tonight and looked like i had coolant boiling back thru the fill cap or the overfill. I couldn't tell which it was dark. just put the radiator back in i didnt know if i might have overfilled it ???

96slow6
04-18-2007, 10:41 PM
You cant over fill a radiator. You probably need to bleed the system some more.

ksuburban
04-18-2007, 10:45 PM
Sounds like you have air in the system still.

01WS6/tamu
04-18-2007, 10:58 PM
It will bleed most of it itself as long as you keep the recovery tank full. It's possible the cap could be bad too.

z28_n_tx
04-18-2007, 11:25 PM
It will bleed most of it itself as long as you keep the recovery tank full. It's possible the cap could be bad too.

x2.....

kevins2000LS1
04-19-2007, 05:46 AM
How could you tell that the cap is bad ??

96slow6
04-19-2007, 05:36 PM
It leaks everytime the system gets hot.

z28_n_tx
04-19-2007, 08:57 PM
How could you tell that the cap is bad ??

just replace it and see if it stops...its a cheap easy fix.

kevins2000LS1
04-20-2007, 03:57 PM
Welli think you'll helped me fixed the problem. I rebleeded the system and filled the reservoir up ( itwas empty almost) and it does fine now. Im guessing the reservoir was low and sucking air in the system. Thanks LS1tech members

01WS6/tamu
04-20-2007, 10:08 PM
Thats what we be here for.

Pharm0r
04-24-2007, 03:14 PM
any other fixes? i keep having it boil up through the rez. im replaceing my tstat and upper/lower rad. hoses today to see if that fixes it....

Cole Train
04-24-2007, 03:30 PM
i JUST had the same problem:Dlol geez this is common. I replaced my radiator cap($7.50 FROM DEALER) and it fixed it. The seals were cracked.

Pharm0r
04-24-2007, 06:09 PM
well i replaced my radiator cap and the problem persisted, a month later (today) it dawned on me to replace the rez. cap. ill get back to you if it works. as for other people, might also be the radiator hoses (upper or lower) which i also replaced along with the thermastat. all this before i thought to just replace the rez. cap =( wasted money tsk tsk.



EDIT: Nope. still gettin it.

96slow6
04-24-2007, 07:45 PM
Of coarse the res cap did nothing it doesnt hold any pressure.

1999ssls1
04-24-2007, 07:52 PM
Sounds like you have more serious problems..