4runner4life93

ok today i drove my 93 4runner and when i got home all the anti freeze was in the tank on the right and over flowing but the hand stays in middle but idk if the hand works whats the problem

toyota4x4907

The hand? You mean the needle on the temperature gauge? I bet your HG blew and the combustion gases pushed all of the coolant into the overflow bottle.

4runner4life93

that's what i thought but i got the heads shaved last November

GSGALLANT

Faulty radiator cap, maybe? Another possibility is a blown headgasket. That's a common cause of an overpressurizing cooling system on the 3.0L.

GSGALLANT

Doesn't mean the HG didn't go again. Who re-installed the heads? Were new headbolts used? Was the proper headbolt torquing method used? Were the headbolt threads lubed before they were installed? There are a lot of possibilities of why you get insufficient clamping force from your headbolts, all of which can lead to blown headgaskets.

4runner4life93

I'm hoping its the radiator cap and the guys that put it in were jokes it took them 3 month's to put in in

PlugItIn

it sounds like the HG to me...its over pressurizing your coolant system...

4runner4life93

OK i have a question if it is the radiator cap which i hope do i leave the coolant in the
(tank on the right) have no clue what its called and refill the radiator

toyota4x4907

It can be either the reservoir tank or the overflow tank/bottle. yes. Just leave the coolant in there and fill the rest of the cooling system.

4runner4life93

ok i will try that tomorrow if its hg blown thats going to suck

waskillywabbit

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24Runna

Your water pump has spun so fast it created a hole which allowed air in, then it literally blew all of your antifreeze/coolant into the overflow bottle. Any motovation to fix it will b met with equal opposition by the 3.0 Demon.




No. j/k. Do a compression test in the all of the cylinders. It will give us a better idea of "whassssssssssss uppppppp".

GSGALLANT

Just for explanation, there is a "low line" and a "full line" on your overflow bottle. When the coolant is cold, the level in the bottle should be at the "full line", and the rest of your cooling system should be full with no air pockets in it. You'll notice there is some room in the overflow bottle above the "full line". When your engine warms up, the increase in temperature of the coolant will cause the coolant system pressure to increase, as the volume of coolant expands. When the pressure reaches the radiator cap's setpoint (around 15psi, if I remember correctly), the relief valve in the cap will open as required to maintain that pressure. The "extra" volume of coolant gets released into the overflow bottle (that's why you need to leave room in there above the "full line").

When the engine cools down, the coolant volume is reduced, and the "extra" volume of coolant from the overflow bottle gets drawn back into the radiator through the cap as the pressure drops in the cooling system.

You can get a shop (if they have a rad cap testing tool) to pressure test your rad cap to see if that's the problem. I hope it is, but it doesn't sound as likely now that you gave us the details about the shop that re-installed your heads.

4runner4life93

OK i just installed the new rad cap and the needle stayed in middle and it did not over flow but how could i check if that's for sure the problem

4runner4life93

and another question is my overflow tank is not taking the coolant to radiator isn't suppose to

PlugItIn

Please do a compression test to see if the head gasket is bad or not...

4runner4life93

i will but the new rad cap seems to be working its not running over

PlugItIn

im going to bet your #6 cylinder is going to have low compression....but, thats just me

4runner4life93

i hope not when i bought the truck it was running on 3 cylinders but i got all of that fixed in November

GSGALLANT

Hmmm... is it just me, or is this not a sentence? What are you trying to ask here?

It's good that your problem seems to be gone. As mentioned before, you should do a compression check just to be sure.

Drive it around enough to get the cooling system up to normal temperature and keep an eye on the overflow reservoir level. It sounds like you might have gotten off easy this time.