HELP!!! Coolant boiling in "puke" tank!
So I've got a weird cooling problem that I can't figure out. I have a 1984 Cherokee and the coolant is boiling in the resovuir tank after a good drive. It's not the thermostat as it has been taken out on the problem persists. My water pump seems to be operational as my coolant has a flow to it. Coolant is at the correct levels. I'm scratching my head on this one and would greatly appreciate any input you guys might have. Thanks in advance for the help.
Originally Posted by Paradise XJ View Post
That said - I had never seen a "closed" system like this before this car, had never even heard of one, and after much fighting and burping and hose checking and fitting and refitting, I replaced the whole mess. IMHO, that system is a piece of kit best left in the scrapheap. Especially in La, you're probably gonna wanna make a change sooner or later. I hear it gets hot there.
I ended up switching from the pressurized ("closed") burp tank to a recovery / overflow tank and "modern" "open" system using the directions on this site:
(I put open and closed in quotes b/c to my mind, they're backwards as commonly used - but apparently thats how the community understands them. The pre-92 system where the overflow tank has no recovery method and has a pressure cap is "closed" - this is what you describe and what scared the bejebus out of me when I saw it boiling in my XJ. The newer system as found on most other cars in existence ever, where the overflow tank is not pressurized (eg cant boil) and serves as a recovery resevoir, is "open".)
Worked like a champ, and he was right on the money for cost/time/effort even though the page is a bit dated. Cost about $250 and took all day Saturday and half a day Sunday for me and my GF, so not exactly Michael Schumacher's pitcrew.
Last edited by JRT; 08-10-2011 at 12:51 PM.
Agree with those guys, more likely a bad rad cap. The cap probably doesn't hold the pressure required to lower the coolant's boiling point.
It's not a car it's a JEEP.
Originally Posted by JRT View Post
Anyway, the OP could have the radiator pressure tested, have the cap pressure tested etc. But, I'd try the cap for $5 first............
Originally Posted by cruiser54 View Post
Originally Posted by tangofox007 View Post
But, since he mentions no leak other than the recovery bottle catching coolant, I would suspect the cap. That, and they're cheap and certainly don't last forever and are frequently neglected when it comes to maintenance.
It it were me or you, we would most likely go out to the garage and test it with our own pressure tester.
Thanks for all the replies
Alright finally got a day off work so it's time to knock this baby out. Thanks for all the replies. It is an 84 as some of y'all were wondering and there is a new development in the case! There is a BIG hole in the resovuir tank now so that will have to be replaced but anyway, off to snag a radiator cap (preferably with a higher threshold, I believe mine is 14 lbs right now). Thanks again for all the help and I'll let y'all know how it goes
|boiling , coolant , overheating , thermostat|
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