brumby radiator,overheating

greg · Post by **greg** » Wed May 07, 2008 1:21 am

Ever since I spent a small fortune on a thorough overhaul on the Brumby Ive noticed that the engine temperature seems to heat up alot more,especially when stationary.
The temp gage was fine before I had the radiator taken out and reconditioned and so was wondering if perhaps the mechanics forgot to reconnect something?Ive checked the basics such as the coolant and hoses and all looks good,pressure test was fine.
Im certain it never used to heat up the way it does now when Im stopped in traffic for a while.Does the fan on the radiator not blow as much when the car is stationary? Appreciate any suggestions,thanks.

Greg

dwayneb · Post by **dwayneb** » Wed May 07, 2008 7:51 am

Is your thermo fan still connected, connection on the left hand side of the rediator, check fuses?
Mine has twin thermo's, hovers at the half way mark at all times

brumbee · Post by **brumbee** » Wed May 07, 2008 8:46 am

my thermoswitch didn't work when i got mine, overheated as soon as i stood still for 1 min, replaced the thermo it worked but switched on too late still overheated, i ended out putting a manual switch in, very easy install, keeps it sitting at half way

YouTube · Post by **El_Freddo** » Wed May 07, 2008 11:01 am

Make sure your radiator has a direct earth connection. Some brumby's use the radiator to earth the switch, which can be a problem if the radiator itself isn't earthed properly.

Cheers

Bennie

dfoyl · Post by **dfoyl** » Wed May 07, 2008 12:49 pm

I assume the OP has a thermo-fan as opposed to the non-AC Brumby's crank-driven fan which would explain the overheating issue when in traffic (low revs = low crank speed = low airflow).

Dean.

Subaman · Post by **Subaman** » Wed May 07, 2008 1:45 pm

They should all have a thermo fan and it really sounds like yours has either not been reconnected or is simply not working for some reason, when sitting there idling you should be able to hear it automatically switch on roughly a needle or two above the halfway mark on the temp gauge.

Cheers
Grant

greg · Post by **greg** » Wed May 07, 2008 11:47 pm

Thankyou all for your replies.
I checked and it seems the thermo switch is connected.I will check out whether it kicks in while idiling.
Dfoyl,what is the 'OP' you refer to?I have air con if that matters.
Thanks again guys

greg · Post by **greg** » Thu May 08, 2008 10:49 pm

It turns out the thermo switch was loose so replaced the clip and presto,fans are both working again.Seems the fan kicks in when idling at 85 degrees or just before halfway on the temp gauge as Subaman suggested.
So thanks guys you all hit the nail on the head.Problem solved.

greg