3b shorty turbo overheating problems

[dickie75]

my mate has a shorty with a 3b with aftermarket turbo on it (non intercooled) running 10psi with very conservative fuel delivery EGt's never get over 420deg post turbo.
going up the freeway in adelaide (the big hill) unloaded it gets warm ish, with the aircon on it gets to the red line.
holding it at 115-120 on the flat has the same result.


new thermostat, radiator has been re cored, waterpump done, aircon condensor cleaned out and spotlights removed off the bar. still same problem.
have any of you blokes got any suggestions?
cheers

[hulsty]

Repair the vicous fan hub, common issue, top up the fluid, about $12 from toyota for one tube.

[pcman]

if using the standard gauge replace the temp sender and actually test the temp with a real gauge i spent close to a year and over 1000bux searching for a overheating problem and it was a dodgy $15 temp sende it wasnt even getting warm

[dickie75]

cheers lads
apparently he Put a brand new viscous fan hub on and changed the temp sender last week still no change. got a digital temperature gauge tonight will install it and test over the weekend to see what temps are getting to incase the gauge in the dash is shagged.
what do your temp gauges sit on at normal running temps? his sits about quarter, where my 1hz 75 series sits just below half at normal running temp so thinking his gauge might be unhealthy.

[BJ73]

I had a similar issue with a NA 3B.

Replaced the radiator, did a few cooling system flushes, replaced the thermostat and temp sender, new viscous fan hub, re-installed the radiator shroud, new water pump, spaced the bonnet with washers to allow better air flow through the engine bay, then put twin GU scoops on it, removed the spot lights etc etc.

The engine performance was not affected but the gauge would go into the red up hills. Never got to the bottom of it as the car got written off, but in hindsight I think the gauge just read higher than the actual engine temperature, making you worry un-necessarily.