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Coolant Leak - Back Of Head

4door_Sleeper

By 4door_Sleeper,
in South Australia

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4door_Sleeper Veteran

4door_Sleeper

Posted
Posted (edited)

Driving back from the city today and noticed steam comming from my left wheel arch.

I pulled over to find steam and coolant leaking from the back of the head. (between firewall and cylinder head, and up high)

I can see that its comming from near the heater hoses, (but cant clearly see the source) and wondered if there is a welsh plug or hose on the back of the cylinder head.

Has anyone else had this problem?

Can you advise on parts; costs and options.

Edited by 4door_Sleeper
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https://www.sau.com.au/forums/topic/208472-coolant-leak-back-of-head/
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Cubes Grand Master

Cubes

Posted
Posted

Nissan being nissan I'd assume its the water feed/return which ever it is that runs from under the plenum around the back of the head then to the turbo. Joining the two metal hoses is a small rubber hose.

I replaced that then the others started to let go. :P

GTR-32U Mentor

GTR-32U

Posted
Posted
Nissan being nissan I'd assume its the water feed/return which ever it is that runs from under the plenum around the back of the head then to the turbo. Joining the two metal hoses is a small rubber hose.

I replaced that then the others started to let go. :P

sounds right to me also....Sorry to say this but its a Bastard of a thing to replace also....Nowhere where you can get your hands in to work...If you can get the car on a hoist it will make life a bit easier as this is how my hoses were replaced...Off memory I think the starter motor even had to come out so there was room to work....Good luck

4door_Sleeper Veteran

4door_Sleeper

Posted
  • Author
Posted (edited)

I found a heater and cooling diagram for the 33's but I bont think they have the pipe you are refering to.

I did a few searches and read comments about the pipes under the 32 plenums, but they indicated 33's are quite different.

Still a hard to reach hose would be preferable to a cylinder head off to get to a welsh plug.

post-1720-1204367938_thumb.jpg post-1720-1204367951_thumb.jpg

Edited by 4door_Sleeper
Cubes Grand Master

Cubes

Posted
Posted

sec 278... Is possibly where it runs off to around the back of the head. The culprit hose being 14056NB if I'm reading the diagram correctly. Not 100% sure as the length of metal pipe in the pic looks too short to run the length behind the head but it is only a pic. :P

There has to be some form of water hose coming from the back of the head as there is only 1 turbo water feed/return which ever it is on the passenger side of the block.

I replaced mine by lowering the back of the gearbox down with the scissor jack and then reaching up; slicing the old rubber hose off with a Stanley knife then sliding on the new. I used a small socket set to remove/install the hose clamps.

Its not too difficult but I did replace it with the car on the pit of which I no longer have :)

OZ_Pomy Rising Star

OZ_Pomy

Posted
Posted

I have also had a leak from around the area you are talking bout it turned out to be a water line from the turbo. I just followed the line from the turbo until i found the leak maybe give that ago. It was a pain to get to but possible with some patience :down:

4door_Sleeper Veteran

4door_Sleeper

Posted
  • Author
Posted

Give Joel a prize, you were spot on

Just went out for another look, and to follow the turbo coolant lines and I saw the leak.

Its one of the 8mm hoses at the back of the head that feed/return from the turbo. (why didn't the use pipe instead of hose :down: )

Now I'll have to get some replacements.

Has anyone found aftermarket hose kits for the GTSt (I have seen them for the GTR) preferably blue silicone to match the other hoses, or will most of the GTR hoses fit in the GTSt.

mid life crisis Veteran

mid life crisis

Posted
Posted
I have also had a leak from around the area you are talking bout it turned out to be a water line from the turbo. I just followed the line from the turbo until i found the leak maybe give that ago. It was a pain to get to but possible with some patience :down:

errrrr who fixed it ? a pair of pointy nose pliers about 8 inches in lenght become ya best friend when getting to this hose

cheers mid life crisis

4door_Sleeper Veteran

4door_Sleeper

Posted
  • Author
Posted

I pulled the rocker covers off and its much more accessable. (but still a pain to reach)

I'll try Nissan on Monday to get a collection of hoses, most of them are more like PVC pipes now rather than rubber.

It's also given me an excuse to paint the rocker covers and change the plugs.

GTR-32U Mentor

GTR-32U

Posted
Posted
I pulled the rocker covers off and its much more accessable. (but still a pain to reach)

I'll try Nissan on Monday to get a collection of hoses, most of them are more like PVC pipes now rather than rubber.

It's also given me an excuse to paint the rocker covers and change the plugs.

mate while your at it do all the hoses...My experiences with cars is that once the first hose goes the rest are only weeks behind it.Do the lot with Silicon...Full on job but worth it in the end...One thing to strike off the to do list

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