Thread: 2.2 Puma engine noise and temperature

That's normal overheat protection, AC off and fuel reduced at 118 degrees Cyl head temp....I would think that the viscous fan should be the first port of call to check, yes.
Whirring noises I had in one recently was the main fan support bearing, comes as the whole front bracket etc and is a pain to fit...

Originally Posted by justinc

That's normal overheat protection, AC off and fuel reduced at 118 degrees Cyl head temp....I would think that the viscous fan should be the first port of call to check, yes.
Whirring noises I had in one recently was the main fan support bearing, comes as the whole front bracket etc and is a pain to fit...

Thanks Justin,
It seems to make sense that its all related, interesting about the overheat protection, Ill check it out tomorrow and see if anything is obvious,
Can you purchase the viscous unit as a seperate item, or is it a complete fan unit?

Its actually the same as the td5 fan assembly, just get a OEM or genuine one!! They certainly need a good fan. If you get to plug in a nanocom etc you can see the CHTemp rise to 118 and it goes straight into fuel cut.. only then does the gauge move... in my opinion a stupid a dangerous design. If you were being followed by a B Double and this happens then you'd best get the heck off the road...

Fan part number PGG500340

+1 Thanks JC, good to know that 118 is the cut-out point.

...Summitt I don't rely on the Defender engine temp gauge. I have an Ultraguage plugged into the OBD port - with an Engine Temp alarm set at 100deg. Occasionally on a long hot uphill it will hit 100 - 103 degrees. I back off when the alarm goes off. Consequently, never been higher than 103deg

Also backing off in advance, down to 5th at 100km/hr will keep the temp down on a long hill.

Question is, how accurate is an Ultragauge 'Engine Temp' reading compared to a Nanocom 'CHTemp' reading? Does Engine Temp equate to Cylinder Head Temp as an OBD reading?

Originally Posted by Zeros

+1 Thanks JC, good to know that 118 is the cut-out point.

...Summitt I don't rely on the Defender engine temp gauge. I have an Ultraguage plugged into the OBD port - with an Engine Temp alarm set at 100deg. Occasionally on a long hot uphill it will hit 100 - 103 degrees. I back off when the alarm goes off. Consequently, never been higher than 103deg

Also backing off in advance, down to 5th at 100km/hr will keep the temp down on a long hill.

Question is, how accurate is an Ultragauge 'Engine Temp' reading compared to a Nanocom 'CHTemp' reading? Does Engine Temp equate to Cylinder Head Temp as an OBD reading?

The same readout should be observed, if it takes its signal from the obd2 port?

Maybe try switching the aircon on/off. The compressor on mine whirrs a bit.

I have had the same symptoms with the aircon cutting out although the first time I had observed the surging was coming up the long hills on the Hume between Goulburn and Yass the other day. I had pretty much put it down to the heat and a headwind. Have had the aircon cut out and the temp gauge move upward on a long pull with the trailer on the back on a hot day. Changing down allowed it to cool and proceed normally.

Regards,
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