Thread: 300 tdi engine temps

Mine has less than half that, so I better not make any guarantees.

Originally Posted by roverrescue

If you drove your 300 powered defender at 85km/h or less everywhere I doubt you would ever get much over 90... I think it was Rick (rick130) who did some aero testing and found the air stall speed was about 90-95km/h - once you hit that the only cooling you are getting is via the viscous fan drawing air over the rad.

s

Explains why my temp never gets over 90 - the old girl very rarely goes over 90km/h.

Don't really understand all this talk of overheating, my 95 Defender with 88deg thermostat sits at 80 most of the time and climbs to 88 on hills on hot days ( like yesterday, 39deg) with the pedal pinned. Comes down pretty quick after.

All stock, I have a thermocouple clamped to the back of the thermostat housing. Had it in the gauge sensor location for a while, no different.

Yes I checked the indicator against a mercury thermometer.

If you measure at that plug between cyl. 2 & 3 you will get a fright - mine reads 110 there on normal days on hills.

I suppose the Disco is different with the a/c condenser in front, fuelling wound up will push things a bit too.

LR supposedly designed for hot climates?

Terry

Yeah it seems there all over the shop the defender runs cool and is fuelled up too. The disco is standard except the tyres but there only 245/75/16 so not a huge differance over standard

I think the rad. core may be the key to it. They can look clean but be part blocked.
Rodding doesn't cut it, you still have a layer of crud stuck to the tube surfaces.
Terry

I find this funny
"If you measure at that plug between cyl. 2 & 3 you will get a fright - mine reads 110 there on normal days on hills."

So head water jacket temps of 110 are less valid than whacking a thermocouple in the airflow at the thermostat housing?

All my temps are measured via a VDO probe in factory location head water jacket just before water enters the thermo housing

when your temp doesnt rise going up hills in 39 degrees is that after driving at 110 for a few hours prior to the hill and punting up the hill flat to the boards? 90% humidity likely doesn't help either.
Issues being raised are a function of poor cooling capacity when at highway speeds and airflow over the radiator is diminished..
.Temps being measured are actual water temps in the head galleries.

Cest la vie

I say defenders have limited cooling capacity you disagree

s

Originally Posted by roverrescue

I say defenders have limited cooling capacity you disagree

s

No, I just don't know.
There are all sorts of variables between vehicles, I just know that my temp sat on ~80 on the flat for a couple of k's then flooring it on a 5 min hill in 4th
takes the temp up to 88, no higher. Repeated several times in 140km, sea level to 900m in 2 hrs at 39deg.
The sensor is tucked behind the thermo housing out of the airflow. It is metal temp though. I am just guessing that my rad is clean.
Terry

Originally Posted by jboot51

Mine sits on 95 with a max of 99 on the hwy.
Around the back streets it will be 92.
The viscous fan locks up noticeably at 95.
Vdo temp gauge is installed

Ditto, and I have a new (six month old) HD Redback core and the hole in the divider blocked.

[edit] coolant temp via a VDO mechanical gauge with the bulb in the stock location.