Blown Head Gasket Issue

[Razor]

Hi

Few weeks ago had an issue with the car, ripped coolant hose under the plenum, then car overheated that day and got it towed. Ended up with white smoke. The engine was still idling OK just a bit low.
So got this mechanic to replace my 3VZFE's head gaskets.
The head was checked out and skimmed, got everything back together, car run fine after setting the ignition timing then 10 mins later the car started running rough, blowing white smoke and water from the exhaust like before.
Head is noisier clicky noise? running low on idle, ignition doesnt seem right as you gotta hold the accelerator pedal to keep it running.

The mechanic broke a white plastic nipple on the inlet manifold to the plenum and he currently just block that for now. ( does this needs to be connected to run properly?) he said he just blocked it as it just recycles the air...I think it should be connect as it was not blocked.

Now how can we determine whats causing this issue like a blown HG again?

Cracked block? is this common? how do we test this?

Please advice

Thanks

[Razor]

This all started when after overheating I noticed that its blowing white smoke and idling really low, so I assumed that time after researching and asking people. No visible milky residue on the cap or oil dipstick or even in the radiator that water and oil are mixing together.

Upon opening the head we noticed the "milky" residue but not that much. The head taken to a engine rebuilder/head machining to get checked and it was machined then cleaned.

We didnt check the block if its cracked or not. I've read that its not very common for a 3VZFE to crack a block unless you've been driving the car for a very long period with it overheating.

Everything was put back again, and the mechanic suggested that we can re-use the head bolts even though I suggested that its supposed to be replaced every time you take it off. The mechanic inspected the bolts and told me that they are fine to re-use.

the mechanic hasnt changed the oil yet as to test if there's any coolant leaking...
The old gasket didnt look too bad not sure where it blew though I think its between #6 cylinder, I'll check with the mechanic.

Right now the temp needle is just sitting right on the middle. The mechanic hasnt check for exhaust gas in coolant, thats the next step now.

[hosking1991]

Maybe the block is warped due to over heating and not allowing the head gasket to seal properly

Also were the heads checked out for water jacket corrosion?

[frostyadonis]

i had a V6 camry come in with a 1MZ-FE with bhg symtoms at work
we got the heads checked, cleaned, machined, serviced
put it all back together and discovered that steam was filling the workshop
coolant running down the glass fold up doors at the tailpipe end

upon contacting the owner, we asked if the car was driven untill it stopped running
he bloke told us "oh yer", "my wife knew it was overheating but didn't want to stop cos she was too scared". that was a big mistake.he could of saved himself $3500, he cracked the shits and got it towed away...

so yes i will also lean towards a warped block.

[Robbos_Toyotas]

done a compression test? i would think unless u cooked the bejesus out of it the block wont be cracked or unless u put cold water in it when it lost all of its hot stuff...

[skiddz]

Hi

Few weeks ago had an issue with the car, ripped coolant hose under the plenum, then car overheated that day and got it towed. Ended up with white smoke. The engine was still idling OK just a bit low.
So got this mechanic to replace my 3VZFE's head gaskets.
The head was checked out and skimmed, got everything back together, car run fine after setting the ignition timing then 10 mins later the car started running rough, blowing white smoke and water from the exhaust like before.
Head is noisier clicky noise? running low on idle, ignition doesnt seem right as you gotta hold the accelerator pedal to keep it running.

The mechanic broke a white plastic nipple on the inlet manifold to the plenum and he currently just block that for now. ( does this needs to be connected to run properly?) he said he just blocked it as it just recycles the air...I think it should be connect as it was not blocked.

Now how can we determine whats causing this issue like a blown HG again?

Cracked block? is this common? how do we test this?

Please advice

Thanks

cracked block; highly unlikely

did you get the block decked?, i found a great deal of corrosion around the water jacket-combustion chamber area, you can only shave 0.010" off the block before detonation and interferance become an issue luckily mine was under 10 thou.

also somthing worth noting, apparently (i say apparently cos its yet to be 100% proven) the 3vz uses un coated pistons (thats not the myth) and when they over heat the pistons shrink on cooling creating a bottom end knock that sounds like bearing noise. like i said dont know if its fact or fiction but its somthing to keep in the back of your mind if somthing of the sort develops

[2jzhilux]

On the 3vz it is possible to put the head gaskets on backwards but they still look normal just the coolant holes on the rear head get blocked by the gasket causing it to overheat still.
Have seen this happen more than once by mechanics that dont pay attention.
Get him to do a cylinder leakage test first and if its ok but still getting hot i would rip the heads off again
It is very rare to crack the block.

[Razor]

frostyadonis the 1MZFE has an alloy block so a little different with the 3VZ iron block, takes longer for it to crack or warped.
But as I said as soon as it was overheating we stopped and got it towed.
The block was not decked.
Will have to do a compression test then.
I will have to ask if he is 100% right that he installed the gasket right.

[skiddz]

The block was not decked.

its likely that this is the cause of your second BHG, take your car back to your mechanic and stick your foot where the sun doesnt shine, he should know better than that

any inconsistancies greater than 4-5 thou will cause issues especially with the 3vz's

[EldarO]

I will have to ask if he is 100% right that he installed the gasket right.

i wouldnt do that if i was you....

[Razor]

He actually confirmed that its been installed 100% right

[EldarO]

of course he did.

hence why i said i wouldnt do that.

because now he's pissed off at you because you think its his fault.

[Razor]

nah he's different he's still trying to figure out what happened

i'll give him a call 2moro see where he's at

[thechuckster]

He actually confirmed that its been installed 100% right

I can also confirm that i'm a 100% qualified brain surgeon.

I also installed by 3SGTE gasket kit 100% correct as per the TSRM - and it leaks oil somewhere.

seriously, any workshop will defend its work rather than admit liability - otherwise they'd never make money.

If it's a problem they could/should have attended to when fixing the motor the 1st time, are you still paying for anything that occurred since?

[EldarO]

and hes not different.

he wants to make money.