Rb26 Vater Temp Problem.

[c-west norway]

I have a problem with the engine water going to over 100 degrees c. when driving at low speeds.

The engine has now been rebuilt and i checked the water pump, changed the termostat to a sard 68c. and changed to a koyo aluminium radiator.

But I still have the same problems....

Can anyone give me some advice on what else to look for?

What is the normal watertemp on a rb26?

Thanks in advance!

Edited May 5, 2006 by c-west norway

[N1GTR]

Make sure there isnt any air in the system, and that you are using the right mix of coolant/water???

Driving my one around town i get it up to 84 degrees, but spirited driving can get it up quite high of course

[c-west norway]

I believe I have the right mix.

Do people have problems with air when changing the rb26?

I will try to extend the in/out pipes and put the coolant and pipes in a bucket to see how good it flows.

[Denver]

What are you using to monitor the temps with?, and what model of car do you have, your info says an S13, its possible if you have done a engine conversion, and have used the rb26 dash temp sender, instead of the one meant for your model of car, it's reading different, just went through this myself, at 90 degree's, the needle in my 33 with a 26 sender was off the top of the dial, witht he 25 sender its down at mid way where it should be..

[c-west norway]

its a r33 gtr engine in a s13.

Right now I am using the comander on my apexi pfc to read the watertemp.

The needle in the dash only moves a few millimeters when the engine is hot.

Can I change the rb sender with my original s13 sender to get it working?

Where are the sender located on the enine?

[mambastu]

its a r33 gtr engine in a s13.

Right now I am using the comander on my apexi pfc to read the watertemp.

The needle in the dash only moves a few millimeters when the engine is hot.

Can I change the rb sender with my original s13 sender to get it working?

Where are the sender located on the enine?

Yes, you can use the S13 gauge sender. Its pretty innacurate though. Doesn't start reading to 50 + degrees and doesn't actually read over halfway untill around 100 to 105 degrees. The engine thermistor that the Power FC is reading is a much more accurate way of reading the temperature. You can screw the CA sender in the same place that the RB25 one fits. I've ditched my standard gauge completely now and use a Defi HUD to monitor temperatures.

What sort of radiator fan, intercooler and front bumper have you got and is it a european 200SX i.e hatchback RS13 ?

I've found the RS13 does need a lot more thought when you fit an RB, particuarly one with two turbos as it has much less grille area than a Skyline. Even with a aluminium Koyo, efficient shrouding and the biggest fan you can get on it cooling is very marginal when stationary, slow (sub 40mph) and also at sustained 85mph + speeds.