I am desperate for help on my 2005 Toyota 4Runner SR5

[NormandyPilotSR5]

I own a 2005 toyota 4Runner SR5 with 268K miles.
I've owned it for about 3 years now, I'm in need of help or at least an answer.
My 4Runner keeps over heating and it's discouraging at the most when the toyota dealer told me it was " odd for a 4Runner to overheat".

I replace the thermostat, I replace the water pump, and the radiator and fan clutch , and yet still it's sending the coolant into the reservoir and overflowing it and it overheats stills. Even with a full reservoir I'm still forced to refill the radiator with coolant. Any answer would greatly be appreciated.

 

[zopperman]

I own a 2005 toyota 4Runner SR5 with 268K miles.
I've owned it for about 3 years now, I'm in need of help or at least an answer.
My 4Runner keeps over heating and it's discouraging at the most when the toyota dealer told me it was " odd for a 4Runner to overheat".

I replace the thermostat, I replace the water pump, and the radiator and fan clutch , and yet still it's sending the coolant into the reservoir and overflowing it and it overheats stills. Even with a full reservoir I'm still forced to refill the radiator with coolant. Any answer would greatly be appreciated.

Sounds like a head gasket to me. V6 i'm guessing?

 

[hearno]

Sounds like a head gasket to me. V6 i'm guessing?

Yeah, unfortunately. Any idiot lights lit on the dash?

 

[Kenney]

I own a 2005 toyota 4Runner SR5 with 268K miles.
I've owned it for about 3 years now, I'm in need of help or at least an answer.
My 4Runner keeps over heating and it's discouraging at the most when the toyota dealer told me it was " odd for a 4Runner to overheat".

I replace the thermostat, I replace the water pump, and the radiator and fan clutch , and yet still it's sending the coolant into the reservoir and overflowing it and it overheats stills. Even with a full reservoir I'm still forced to refill the radiator with coolant. Any answer would greatly be appreciated.

Check for a "Collapsed radiator hose”.
Start the engine and loosen the radiator cap. When the engine gets to operating temp. (the thermostat should be open by then), remove the cap and look to see if coolant is moving in the radiator. (water pump working)

 

[nevada]

is it actually overheating?
or just pumping the coolant out?

 

[lehiguy]

I think a compression test is on your near future. It is easy to do and should reveal whether or not you have a bad HG.

 

[macoyle]

Hey man, lets go over a few basics first. Are you sure its over heating or is it boiling over through the overflow reservoir? If it is over heating, ex gauge is hot, white smoke and its boiling over then its not just too much coolant in the system.

You have checked all of the immediate basics with what you have replaced. Also make sure that your radiator isnt caked with mud or debris, too many bent fins, etc.

An easy way to check if you have a head gasket issue is to get a strip kit that will test for any carbons in the coolant. Also check the oil for any coolant, it will look milky if it does. I would also do a compression or leak down test

 

[450exc115]

I'd actually do a leak down test with the radiator cap open to see if you get air into the coolant system. It sounds like a combustion leaking into the coolant problem which is typical if you loose the seal between cylinder and colant passages.

 

[jow]

Would a bad head gasket show bubbles in the radiator idling at operating temp?

Would a plug look different in color or etc? Then a leak down test on that cyl would show bubbles with cyl held at TDC? Be careful when psi is added, the engine might turnover if it is not restricted (with the harmonic balancer nut, break-over bar and cheater form what I can remember).

 

[FJvet]

ever think about leaving Texas???

 

[riceandpho]

u sure there no air bubble in the cooling system? might need to burp it first. heater on max, full no ac light and have it blowing to you in the face, windows down, rev at 2000-2500 steady so u can warm it faster. also do it with the radiator cap off.