Does my 2j need a new head?

[DLA11D]

I think i might need a new head on 2JZGTE

The other week i was driving to a show and it threw a belt due to a bolt holding the powersteering pump snapping. It happened whilst i was crossing a bridge and had nowhere to pull over straight away,took about 30 secs to get off the bridge, before i pulled over it blew the lower radiator hose off and threw the contents of my radiator all over my engine bay. i had a massive steam cloud coming out of the engine bay. Rolled in netrual got around the corner.
I shut it down and called a tow truck and haven't driven it since, whilst i was waiting I inspected the engine to see if i had water in the oil and couldn't see a thing looked alright.

Anyway i fixed the bolt the other day, put a new belt on topped up the radiator, whilst i was bleeding the system i noticed a welsh plug once the thermostat opened up was bubbling water and stopped the process of bleeding the system.

Rechecked the oil, couldn't see oil in it again, water in radiator seemed fine as well

So am i lucky enough to just need to replace the welsh plug (number 1 behind the exhaust manifold), or time to start saving a buy a new head?.

Sorry for long story
Trav

[CraigD]

best bet is to get a TQ checker checks for combustion gases in the coolant system, this will give you a better indication if there is a problem.

if all sweet replace the welsh plug and pressure test the coolant system.

if your around sydney i've got a TQ checker that you can use

cheers craig

[2jzhilux]

Just replace the core plug and put a smear of sealer on the outside of it and rebleed the cooling system and then see if it gets hot.
A motor could run for 30 secs without any water and still be fine.

[allencr]

Just replace the core plug and put a smear of sealer on the outside of it and rebleed the cooling system and then see if it gets hot.
A motor could run for 30 secs without any water and still be fine.

+1
Also, bolts don't snap by themselves and hoses don't blow off by themselves, so I'd suggest that someone else work on it from now on.

[Shakotan_Aaron]

did those hose pop off the radiator or spit??

[wagonist]

+1 for checking the hoses if it split.

likewise for bolts, hoses don't normally pop off or split just by themselves.
but if this hose had been leaking, you may not have had much coolant in there to start with.

If you've got access to the TQ checker, I'd suggest you do it anyway.

[DLA11D]

+1
Also, bolts don't snap by themselves and hoses don't blow off by themselves, so I'd suggest that someone else work on it from now on.

The bolt wasn't high tensile, it failed due to the new angle the powersteering pump sits on. went trough all the accessories that bolt on and replaced all the bolts.

did those hose pop off the radiator or spit??

It popped off the outlet from the block. the outlet was shortened to fit into my engine bay to make it easier to fit a lower radiator hose on it. replaced it with a new silicon hose, before it was a retarded combo of alloy and joiners.

[Shakotan_Aaron]

i split a heater hose on my corolla... but thats rather old! still have some of the other original hoses on it.

my old datto had the original hoses (1974 model!) it didnt leak. if the gasket is leaking then it could be putting extra pressure in there as well as making the water heat up.

even without any equipment, if you fill up the radiator and have it running for a while, once the thermostat has opened and it flowing (dont forget to turn the heater on too) the bubbles should stop after a while, if they contine or it gets hot then you may have a leaking gasket. even if it is you wont need a new head. if its pop'd then having the head skimmed with a toyota or performance gasket will be the fix.


edit: well if it doesnt have the factory "rib" there then that may have been a major contributing factor to it popping off.

i have a alloy joiner in my corolla due to a different radiator fitted, haven't had an issue yet.

[Lachie]

The bolt wasn't high tensile, it failed due to the new angle the powersteering pump sits on. went trough all the accessories that bolt on and replaced all the bolts.




It popped off the outlet from the block. the outlet was shortened to fit into my engine bay to make it easier to fit a lower radiator hose on it. replaced it with a new silicon hose, before it was a retarded combo of alloy and joiners.

If you power steering pump isn't alinged properly, then you should fix the alingment first instead of just putting a stronger bolt in. Bolts should never be loaded in shear, and your just bandaiding the misalingment problem. Chances are youll now make the next weakest link in the chain fail. I might be misinterpreting what happened, so correct me if I'm wrong.

And if you've cut the ringroll off the outlet on the block, maybe its a good idea to get a new ring roll put on a piece of tube and weld it onto the outlet.

[DLA11D]

If you power steering pump isn't alinged properly, then you should fix the alingment first instead of just putting a stronger bolt in. Bolts should never be loaded in shear, and your just bandaiding the misalingment problem. Chances are youll now make the next weakest link in the chain fail. I might be misinterpreting what happened, so correct me if I'm wrong.

And if you've cut the ringroll off the outlet on the block, maybe its a good idea to get a new ring roll put on a piece of tube and weld it onto the outlet.

the misalignment was repaired a long time ago, but the bolt must have been reused. hence the failure.

[DLA11D]

Just replace the core plug and put a smear of sealer on the outside of it and rebleed the cooling system and then see if it gets hot.
A motor could run for 30 secs without any water and still be fine.

What sealer would be best to use? ordered the plug today.

[sleepy1g]

stagg is the recommendation for core plugs

[2jzhilux]

I dont know what stagg is but i usually use permatex form a gasket(the black gooey stuff)

[sleepy1g]

Stagg is the proper jointing coumound designed to use on welsch plugs.

has been for 40 odd years. the permatex stuff is designed for gaskets not metal on metal sealing.

oh and i get this info from being a mechanic and have been in the automotive game for 15 years

[2jzhilux]

Stagg is the proper jointing coumound designed to use on welsch plugs.

has been for 40 odd years. the permatex stuff is designed for gaskets not metal on metal sealing.

Do you have a link to this stagg stuff i googled it but cant find it as im interested in reading up on it ,even though the permatex has worked fine for me in the engines i have built.

oh and i get this info from being a mechanic and have been in the automotive game for 15 years

Join the club your'e two years ahead of me though im only at 13 years