Issue fixed, cracked radiator cap

I have the exact same one in my box

 

try post #7 - worth a shot:

https://www.tacomaworld.com/threads/coolant-reservoir-bubbling-and-filling-up.437255/#post-12676768

 

I'm not even going to waste time reading all the posts. Its your head gasket. Pull tge spark plugs, put a scope in the cylinders. Cylinder 5 or 6 will look squeeky clean, the rest carbon'd up.

This is what is happening...

Between 2004 and 2006 the 1GR-FE engines manufactured have a design defect. Cylinders 5 and 6 run hotter than the other cylinders, ESPECIALLY 6! The head gasket developes a hairline crack. At running temp exhaust gas escapes the cylinder into the cooling system creating a bubble. if you overheat, flush the cooling system of all air, it will run fine for 2-3 days before enough exhaust has been forced back into the system. It will overheat again.


I went through this personally years ago. 2 weeks ago a friends started over heating. She, yes, she, lol, wouldnt listen to me. She spent a fortune having mechanics 'who knew better' do weeks of diags and 'fixes'. On day one, I said, but barr's in it and trade it in now!

Last Thurs her 'mechanic' (I didn't know this) called and told her that the head gaskets on both sides were bad, cylinder 5 and 6, although I said from day one, scope the cylinders... he finally scoped them. He said he recommended putting sealant in it and trading it in.

Friday she showed up with a new Chevy and egg on her face, lol!

Either replace the engine with a low miles 1GR-FE from a 2008-2009 FJ whois VIN starts with 'J', replace the head gasket yourself (financially reasonable, not sure of the condition of your engines lower) or do like she did, Barr's and trade it in.

TRUST ME!

 

Lol! Really, LOL!

BLOCK TESTER WILL NOT PICK UP THE LEAK! Not the way this failure happens. On several occassions, left it pressured for hours. Nothing!!

 

Btw, 1 went with a 2009, bought the whole drivetrain out of 2009 FJ that was made in Japan. People say 1GR-FE engines made in the US are just as good as the ones made in Japan... nope!

VIN starting with J means made in Japan, 5 US, 3 Mexico.

 

If its a blown head gasket, he should be able to unscrew the oil filler cap and see if it looks like chocolate milk inside.....

 

If you truck doesn't overheat often then there's no guarantee there's a blown hg - symptoms of a bhg are not always the same. Going off of anecdotal symptoms even in a pattern failure does not verify the failure. You've got to find where the coolant was leaking though, obviously. You can rent a compression tester or leak down test kit for free from an autoparts store and there's more than enough information on youtube to show you how to do them.

 

lol fn l...not going to waste time huh... if you would have read the thread you would have seen that everything you wasted your time typing had already beed said. Oh...and the problem is not the motor it is the head gasket itself which Toyota acknowledged with the redesigned head gasket not a redesigned motor.

 

Compression test.

 

Testing the coolant for exhaust gases is quicker and very accurate...if hydrocarbons are present it leaves no doubt. Low compression results can be a result of other issues.

 

Leak down test would be better, for this scenario. However, coolant blown all over the engine bay, and a 250º engine temp says all that needs to be. Heads are warped, and at least one gasket is bad.

The sealant around the oil ports generally doesn't go bad. Usually between cylinders, or straight to the water jacket.

 

Not sure what you mean here..

 

I got lucky with mine and saw the writing on the wall and caught it before any catastrophic temps were hit. First symptom was the gurgle in the dash at start up then the coolant spew on a long road trip. We still sent the head to the machine shop to verify but it was ok. With mine I had coolant all over the engine bay but never saw a temp over 205. My coolant leak was all at the overflow tube, the tank would over pressurize and it spewed out the overflow tube only and the cap never came off.

 

The post below was written by a very skilled dealer tech who has worked that job longer than a some
of people here have been alive.
Post #7 has something interesting to say about the cause of failure:

 

I sense a horse beating

 

trade it for a ford

 

Nope! Mine showed none of the normal signs only overheating, random gurgle at startup from heater core and a squeeky clean cylider 6! Once heads were pulled I was EXACTLY right!

 

I read the post... what am I supposed to see?

 

Initial post told me all I needed to see, everything from coolant spewing to the 250* temp that the truck hit. Head gasket undoubtedly. The best tried and true test out there is a cylinder leakage (leak down) test. The other great test is done using an infrared sniffer but the equipment required to do it is unreasonably highly priced. If one doesn't track it down the other will catch it. Block tester is not all that great of a method.

 

Never said they redesigned the

Leak down test... left it pressured for hours, no sign of head gasket failure even though it was bad.