Thread: EGT AND WATER TEMPERATURE

on a disco 2 td5 i'd assume not as the gauge is normalised by the ecu....

not sure about the defender td5 tho?

what vehicle?

thanks

steve

Defender TD5 guage would behave the same as the D2 gauge, so you probably wouldnt notice.

Sorry all. Vehicle is a 300 tdi. Jim

I would suggest that EGTs high enough to cause a noticeable or significant change in coolant temperature, have already done damage.

yes it will but by the time you get it that hot for that long your potentially doing damage.

Originally Posted by strangy

I would suggest that EGTs high enough to cause a noticeable or significant change in coolant temperature, have already done damage.

Correct, I'd be very worried if I noticed any change on the gauge

JC

The EGT's would have to be so high to heat the head that the turbo itself would be glowing red hot. Pat

In my experience with a 95 300tdi defender. The "temperature gauge" is normalised to read at the same position from approx 75 degrees right through to 100 degrees. By the time the needle starts moving you are up over 100 degrees water temp.

Im now running an EMS2 in the factory gauge position and due to a non functioning thermofan i can tell you that the relationship between rising EGT and rapidly rising water temp is not very linear. Fully loaded up a big hill EGT will rise up to about 600 celsius and park (from a base line of 400 or so) (I should turn up the juice!) but if I keep the pedal pegged the water temp will just keep climbing up to 115 and onwards if I let it.

I would guess if you are noticing a rising water temp gauge on a 300tdi it will be radiator core blockage +/- thermofan clutch as opposed to high EGT... or at worse a head gasket problem?

A properly functioning cooling system should be able to shed the amount of heat being generated in the head.

S