MQ patrol overheating

Does it boil and spew out water or is it just that the guage shows hot. A good test is to get a cooking thermometer and stick it in the radiator when you see the thermostat open. You will know when this happens as the water will all of a sudden start rushing by the opening. as the mecury is rising check the guage and this will give you a starting point as you will knoww that the thermostat is opening at the correct temperature and you will know where that is on the guage and if the guage is faulty. Also was he clutch fan new and what size thermo. if the thermo is less than 16 inches get rid of it its useless a 16 pulls around 2200 cubic feet per min which is minimum. If the clutch is serviceable then overload it with the you beaut oil to lock it up more and finally check that the bottom hose doesn't suck in a little when the revs get up for about a minute as this will restrict flow. other than that have your injector pump timing checked and if it still does it ,,,,, Think seriously about a new car. (only kidding)

Is the gauge Fubar??

Ive had the same thing with the GQ, replaced everything but the chassis... Try a VDO gauge.

Matt,

After you do a check as suggested by Truckster, with a reliable temp gauge, would give some thought to condition of head and block.
Your vehicle is old enough to vote, and if it hasn't had radiator conditioner used regularly, then there could be some bad corrosion in the block.
Don't know if the SD33 is direct or indirect injection, but if indirect, then it could have some cracked combustion chambers. Feel if the head was cracked, it would be overheating all the time.

Happy new year,
Hooroo...

Matt,

As I said in a previous reply tonight I help a mate out that has a radiotor shop. We talked about your radiotor problem over with Doctor J Walker and the three of us came up with the same conclusion. You have obviously looked at alternative causes and we came up with two suggestions,

1. Youve tried a number of differrent approaches to the problem but we see no suggestion of the sender unit. Have the sender checked by an auto electrician.

2. Don't know where you are but in Queensland a number of MQ's had overheating by a particular brand of radiotor. I think he said Kingstone or si,ilar. The problem is that the radiotor had a large single row tube and the water flowed too freely not allowing it to be cooled. People changed from these radiotors and the problems was solved.

Anyway, two suggestion if you need any more info contact me.

Regards

CumboTD42
EFS
TX4400
Safari Snorkel
Rola Racks
Milford Barrier
Engel 39l

Hi guys,

This is a problem that I can possibly help you overcome. By reducing the friction in the engine and transmission, will reduce the load on the engine. I have managed to help overcome this problem before.

Check out the present "Press Release" Bi-tron.

Contact me.

Brian. 525Bi-Tron Fuel & Oil Metal Treatment