Attempting To Fit Rb25 Water Lines

[samoo]

Hi all,

Attempting to swap out the KKR430 that came with my car and put on a RB25 turbo.

Gone to do the water lines and the KKR has a screw on fitting, which screws up to a brass fitting on the motors coolant line pictured below.

Any idea what thread this brass fitting on my motor side is?

The rb25 turbs has a flared line for a hose + clamp, so I can't screw it on to this fitting. Was thinking of buying an adaptor + barb, just need to know what thread/pitch it is.

close up:

it sits at the back of the motor

[discopotato03]

At the back of the head on the drivers side there is a rubber elbow , its a Pita to get tobut I think thats where the steel line starts . The go may be to go to an import wrecker and see if you can get the standard pipe that fits behind the head . My 25 has a GTRS kit on it and to be truthfull I'm not real impressed with HKSs braided line system . Thinking about it you should probably get second hand or new both complete turbo water pipes because they will have the necessary banjo housings as part of them . Get the banjo bolts and add new copper washers to make sure everything seals .

Hint , there is a bracket bolted to the back of the I think inlet manifold which supports part of the wiring loom - from memory . Remove it and the idle air control housing and then you can get to that rubber elbow . I'd replace it because if it splits or cracks you cannot get at it easily by the side of the road and your engine will pump its coolant out .

This is a really stupid system and Nissan should have picked up water low on the block (which they do) but returned it back round the front of the engine to the top water outlet RB26 style . If you got the 26 hard pipe that goes behind the cam pulley rear plate you could do this , just don't forget to block the head or manifold (whichever) at the back if you re route it .

A .