Jump to content
SAU Community

Recommended Posts

Just completed a re-build:

JE 87mm pistons

Tomei OGK - 1.2mm

ARP Head studs

Cosworth Bearings - Std

Tomei Poncams - 260/260

Apexi PFC - D Jetro

Koyo 4 core Radiator

N1 oil pump

Mishimoto 62c Thermostat

GT2860-5 Turbos

Mines Titanium DP

3.5" SS Jasma Exhaust

Car runs well and maintains water temp in the 70s and oil temp in the 80s when driving.

Problem is when idling for more than 10mins, water temp rises to 90c+. If the car is parked soon after, about 200ml of coolant flows out of the expansion tank.

Advice?

Link to comment
https://www.sau.com.au/forums/topic/361704-rb26-rising-temp-advice/
Share on other sites

you might have a basic water pump issue or some sort of flow issue

90 isnt that bad, but it shouldnt move past 90

ask the engine builder?

the n1 water pump flows less at idle vs stock as its designed for high end RPM high flow

so at idle, it will actually be outperformed by the std water pump in terms of flow

when did this start? since the radiator change?

check the basics etc

Would an N1 water pump help?

not really.

You've gone a put a part in thats not fit for the application - a 4-core rad.

As you've stated it's perfectly fine when driving, and it will be... Or more importantly track - which is what i'll guess it's designed for. Not street.

I could be wrong, but all bets point to the rad as the issue.

You might have not bled it correctly or something and have air lock/bubbles. But i doubt it.

I built the engine myself and it definitely goes past 90, but if I keep the revs up above 2k, it drops slightly.

The problem started after the re-build which is the same time I installed the new rad.

Already bled the system twice. No change.

Is it a 53 mm koyo radiator? If it is I have the same on my r33 gtr

I have never had a problem like this, normal driving temp is at 66 deg n when at idle in traffic it may only move 1 or 2 degrees

Thermostat only determines when the water starts circulating. Once it is open it has no effect on max temps (only minumum temps in a very cold climate). Stock would be better as 70deg is not hot enough. Have you got a shroud for your fan? Fan doesn't do much without one.

  • 4 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Kinkstah, no, coilovers aren't illegal, especially as a bolt straight in. The illegal part will be if they're altering suspension geometry beyond factory limits, or the ride height is not legal.   Sounds like the blue slipper just didn't want to deal with any later possibility of mods appearing on the car.
    • The problem has always been that coilovers are able to be adjusted, almost at any time, to be too low. Most people who ever get/got defected for/with coilovers were actually afoul of the minimum ride height rule. So the interpretation by cops/inspectors was always that it is pointless to allow numpty to raise his coilovers and get the car inspected/cleared, then just drop them back down again as soon as they get around the corner from the inspection station.  This led to the interpretation that they were illegal unless rendered such that they can't be adjusted (ie, collars welded to the body, that sort of thing). That may or may not have ever actually been the official line, but I'm pretty sure it's not considered to be a solution these days. Coilovers themselves fall under clause 3.2 b of that manual, because they are an "installation of a variable ride height system" and they don't fit the exclusions in that clause (which point to air springs and other pneumatic adjusters). So, as per previous statements, they require engineering cert to be legal on the road. Once you have such cert, provided you do not adjust them outside the height range covered by the cert, you are OK. Without, you have an unroadworthy vehicle.
    • Here E10 is the cheapest fuel. And general advice is to not use it unless you hate your car. From what I remember it clogs up stuff in the fuel system or injectors?  With US/Canada being E10 across the board, does that mean that all fuel there is terrible?
    • Sorry, are coilovers ACTUALLY ILLEGAL in NSW? They aren't in Vic, as long as they retain 70% of stock travel and the car is above 100mm off the ground. Does NSW actually have a law making coilovers actually illegal? RWC/Blue Slip/Engineering people not knowing the actual f**king laws boils my blood. Demand them to point to the documentation that states a coilover is illegal. (it may exist in NSW ) Edit: I checked. They aren't. https://www.nsw.gov.au/sites/default/files/2021-02/RMS-infosheet-light-vehicle-modifications-manual-suspension-and-ride-height.pdf
×
×
  • Create New...