Coolant Boiling
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Coolant Boiling
I have an 86 4Runner and sometimes when I shut my truck off and get out the coolant will be boiling and get spit out of the overflow tank. Ive been checking it and filling it back up with water when needed, it doesnt always do it just sometimes. Also my oil level has been consistant and isnt going down and my truck runs fine. Im thinking it might be a bad radiator cap so im gonna try to re place that but if that doesnt work I dont know what it is, Any Ideas?
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Just in case it's not your head then it can be your fan clutch. The oil that is stored in there are probably as thin as motor oil and might need to add additional oil. That's a possiblity. Just my two cents. Good luck
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Yea i had quiete a bit of antifreeze in there but i have just been adding water to it so its probably quite a bit of water by now.Thanks yall!
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x2. check this first. Dont add "just water". drain your coolant. mix a good 60%anti-freeze and 40% distilled water for the coolant. Probably head gasket though as I was having a pretty similar problem with my 22re
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Yea I just changed the radiator cap and I have only driven it a couple times but one of the times I could hear the coolant still boiling in the reservoir but it's nothing near as bad as it was and it's not spewing out anymore. I'm hoping I just don't have a good water and antifreeze mix plus it's been almost a hundred degrees her every day too. Any thoughts?
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Yea I just changed the radiator cap and I have only driven it a couple times but one of the times I could hear the coolant still boiling in the reservoir but it's nothing near as bad as it was and it's not spewing out anymore. I'm hoping I just don't have a good water and antifreeze mix plus it's been almost a hundred degrees her every day too. Any thoughts?
Water will boil much earlier than a good water/coolant mix.
Then get some of your old coolant tested for combustion gases.
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K thanks a lot u guys! Where would I go to get my coolant tested for combustion gasses. And also no I have had this truck since 190,000 miles and now it has 256,000 and I have not replaced the thermostat
#20
You can get a tester at Autozone for around 25 bucks, and the fluid is about another 7? I'm guessing at the price, but it was somewhere in that area. Good thing about Autozone was that I could have returned the unit and gotten the purchase price back within 30 days. kind of a rent or buy deal, and since it was brand new and only 25 bucks I kept it.
That said, I'd say it's your head gasket and the only real fix is a SAS.
Last edited by dwest76; 06-23-2010 at 05:44 PM.