4runner94

This is a 94 4runner with a 3.0 v6. The headgaskets have gone bad 30k miles ago and were replaced. The trucked just started puffing white smoke like crazy out of the exhaust. Did this for about 5 seconds and then it stalled. Now it will not start at all. I did a compression test on the driver side and all 3 cylinders had 180psi. The intake manifold is filled with coolant, ever time i open the throttle coolant poors out of it. Im wondering where coolant runs through the intake manifold becuase i think the gasket went bad. Prior to this the truck was always idleing high if that means anything else. Any ideas?

Thanks in advance,
Chris

04tacomatrd5speed

white smoke means your burning water... could very well be head gaskets maybe check the coolant by-pass hoses on the throttle body not sure if the 94 3.0 has the coolant by-pass runing through the TB.

Kiroshu

What was the quality of the head gaskets? What was the quality of the service to install them? Its 90% chance you got bad gaskets or them peopl you took it to never did them or did just one. Did it over heat before this? If so you also may have a cracked head which is bad news. Hopefuly the block is not cracked becasue yea you will need a motor change.... Its either the bad gaskets, Cylinder heads cracked, block cracked...

4runner94

OEM headgaskets done by toyota and yes both were done, it did not over heat. I was thinkin though it had idleing problems for about a month before this, isnt the idle controled by coolant in the intake, maybe where ever the coolant is in the intake that gasket went bad?

FredTJ

Nope..



Fred

4runner94

So is there any coolant running through the intake anywhere?, if so where so i can check if its leaking there

Cyclopsblown34

You might need to replace your intake gasket. Can you see coolant in the intake? I can't think of anywhere else coolant would be entering the intake tract. Is there coolant flows through the throttle body? If the compression is within ten percent on all cylinders and there's no oil in the coolant or coolant in the oil, I would say an intake gasket went bad. The intake is filled with coolant so I'm guessing you have an intake gasket that is smoked.

4runner94

yeh when i crack the throttle open coolant starts pouring out of the throttle body, its like the whole intake manifold is filled with coolant, also no mix, the oil seems fine with no coolant in it

4runner94

anyone?

TNRabbit

I wish I had a nickel for every time I've heard that thread topic...

Sounds like it's time to pull the plenum. You've got a gasket gone somewhere.

4runner94

so the gasket that goes bad is between the intake manifold and the head? or is it just someone where in the intake manifold?

fireman1559

here is something that might help http://www.ncttora.com/fsm/1993/engine/105descript.pdf and you said it wont start well igot something for that too http://www.ncttora.com/fsm/1993/engine/63troubles.pdf

Cyclopsblown34

I have no clue what the induction system looks like but my thinking is, the gasket at the throttle body to intake runners if it is so constructed is more than likely where he's referring to. It more than likely isn't the intake to head gasket. It is a gasket closer to the throttle body.

4runner94

guess ill take it apart and look

Cyclopsblown34

Start where any coolant hoses run around it. I doubt it is any further than where it bolts to the intake. Sorry, I Googled for an exploded view or image of the intake and no luck. I could give you a better description of where to look.

4runner94

I just need to find exactly where coolant runs through the intake manifold.

Cyclopsblown34

Hoses without clamps will most likely not have coolant in them. The hoses with hose clamps will more than likely be water hoses. Sorry, I'm not able to give more help. Coolant generally flows through the intake and on several engines it is piped from the intake to the throttle body through hoses.
Good luck.

4runner94

Thanks

4runner94

Took the entire intake manifold off to the heads, the gaskets between the lower intake manifold and the head looks fine, Any other ideas?

Zinek

Your throttle body has an air valve on the bottom that is controlled by coolant flowing through it. When coolant cold, the valve opens allowing air to bypass the throttle plate causing higher idle . When hot, the valve closes and idle is controlled by throttle plate and air ajustment screw located on top of the throttle body.