EGT AND WATER TEMPERATURE

[jx2mad]

Would an increase in EGT reflect as an increase in engine running temperature as indicated by the standard gauge? Jim

[5teve]

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

[Psimpson7]

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

[jx2mad]

Sorry all. Vehicle is a 300 tdi. Jim

[strangy]

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

[Blknight.aus]

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

[justinc]

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:eek:

JC

[PAT303]

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

[roverrescue]

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

[isuzu110]

I own a 300TDI defender, have an EMS2 and tow a camper trailer.

I have noticed that on hill climbs of over 5 minutes, the water temp (measured by the EMS2 in the top thermostat housing) will rise around 5-7 degrees with the EGT of around 600. It usually takes 1-2 minutes to return to normal.

I have not noticed the factory temp gauge move.

I previously had the temp gauge move a lot whilst climbing Cunningham's Gap west of Brisbane. I then found the rad was partly blocked. A recore fixed that.