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why is it boiling over???

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Old Aug 16, 2002 | 04:02 PM
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Default why is it boiling over???

i had a an overheating problem earlier. i found out what was causing it , a jammed up thermostat.
but now after i put in the old thermostat with the lower temp. mod, the car runs at a good temp but as soon as i turn it off it boils over and starts puking coolant.

could i have overfilled the radiator and puketank? i bled the system properly.

i drove it last night after i installed the thermo. and it was ok . and today i top it off and the boiling over started.
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Old Aug 16, 2002 | 04:17 PM
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Default Re: why is it boiling over???

If your car is running constant water temp and it is were it is normaly at it could be a bad radiator cap when you shut off car water temp gets a little hotter and builds a little more pressure
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Old Aug 16, 2002 | 04:24 PM
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Default Re: why is it boiling over???

i'll swap it out and see what happens.
now just in case this was not the cause, what else could it be?
thanks.
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Old Aug 16, 2002 | 04:35 PM
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Default Re: why is it boiling over???

The only other thing i think it could be and wont like to here this is a head gasket starting to go bad cylinder pressure will build water pressure it can start off real small you shoud not be buliding more than 15-16 psi in system
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Old Aug 16, 2002 | 04:50 PM
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Default Re: why is it boiling over???

i got new cometic head gaskets in there.
wouldn't a head gasket cause it to boil over when running??

would overfilling the puke tank cause it to do so?
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Old Aug 16, 2002 | 04:55 PM
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Default Re: why is it boiling over???

over filling the tank will do that but you should not here the coolent pumping into the bottle
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Old Aug 16, 2002 | 05:01 PM
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Default Re: why is it boiling over???

so most likely it's a bad cap?
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Old Aug 16, 2002 | 05:39 PM
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Default Re: why is it boiling over???

swapped out the cap with the other one i had, ran it for 10 mins and shut it down, no more boiling over.

i'll have to drive it around to see how it does, just to make sure. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

thanks alot tuffls1.
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Old Aug 16, 2002 | 09:59 PM
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Default Re: why is it boiling over???

In case that the new cap doesn't ultimately fix your problem...

Have you had any of the radiator hoses off lately? If so, check to make sure you have the small line from the coolant resovoir connected to the upper connector on the radiator (just below the car itself), and the other hose (that comes from the crossover tubes on the heads) below that.

I can relate to your symptoms first hand <img border="0" title="" alt="[Embarrassed]" src="gr_emb.gif" />
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Old Aug 17, 2002 | 03:01 AM
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Default Re: why is it boiling over???

AHHH !! it boiled over again, at 210 deg.!
and only when i shut it off!
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Old Aug 17, 2002 | 03:06 AM
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Default Re: why is it boiling over???

update! GeorgeC if you were a lady i'd kiss you!!!

i just checked the car and you nailed it!!!
i had the rad out 2 days ago and yes my 2 small lines are misplaced, i had the coolant line connected to the lower fitting and the t-body line connected to the top one.

i feel stupid!

just incase..... what pressure are the radiator caps rated at?
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Old Aug 17, 2002 | 08:02 AM
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Default Re: why is it boiling over???

They're either 16psi or 18psi... I can't remember which.
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Old Aug 18, 2002 | 06:22 AM
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Default Re: why is it boiling over???

that fixed the problem !

now i'm back to the overheating with the A/C on dilema!
i have three ( count'um : 3 ) electric fans running and it goes to 250 deg. before i shut the A/C off.

any suggestions?
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