Replacing turbo water line - any recommendations or advice?

[jtha7]

Hi all,

Restoring r33 series 1 rb25det. All the heater hoses were on their way out, have replaced them and put it all back together. After testing I noticed a small leak from behind the head on the actual metal water line to the turbo when cars warm. I tried running a longer hose over it but it kept leaking...  

I am about to take the (stock) manifold off again😔 to change the water line does any one have any lines they recommend? I was looking at Aeroflow Turbo Oil & Water Line Set but not sure what everyone else recommends. Car is completely stock but want to upgrade turbo eventually. it looks like ill have to disconnect a lot just to replace these lines so if there's anything else recommended to do please let me know.

Thank you in advance!

Edited Tuesday at 07:50 AM by jtha7

[jtha7]

Found this as well which looks like it has the correct fittings? Not 100% sure on what to get:

 

Edited Tuesday at 01:07 PM by jtha7

[sunsetR33]

One thing I can tell you is, do it properly the first time. If you encounter unexpected problems just let the car sit for a week or two if you have to get some other parts or figure stuff out. 

I'd have said go and use as many OEM parts as possible but since you want to change the turbo later on a custom kit is probably the better choice. Since I have no experience with RB25 just compare parts diagrams and images before buying a line kit and it should be easy to see if it has everything you need.

Amayama has very good parts diagrams and part number lists, that is what I used a bunch to figure out what I might need.

And don't forget to plan ahead and possibly renew other stuff that's easy to get to while you're in there doing the turbo lines.

Happy wrenching

[hardsteppa]

On 29/07/2025 at 5:47 PM, jtha7 said:

I am about to take the (stock) manifold off again😔 to change the water line does any one have any lines they recommend? I was looking at Aeroflow Turbo Oil & Water Line Set but not sure what everyone else recommends. Car is completely stock but want to upgrade turbo eventually. it looks like ill have to disconnect a lot just to replace these lines so if there's anything else recommended to do please let me know.

Thank you in advance!

Any advice? Yes. Learn to make your own lines, they're actually pretty easy and you can make hard lines, flexi lines, whatever you like, perfectly fitting to your application. 

https://www.efisolutions.com.au/   

sell a huge range of hoses, fittings, everything you need. You might have to outlay a bit in the beginning (eg I bought a 5 metre roll of stainless tubing that I've used less than a metre of) but still cheaper than buying premade shite hoses that sort-of fit.

[hardsteppa]

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