Temperature a bit high?

Cranium · Jun 25, 2015

Just got my Defender 90 200dti back from having a recon engine fitted, the temperature looks high to me, but it might have been low before, they had to fit a new coolant temperature switch.

As I haven't driven many defenders I don't know what is normal, what do you think?

Turboman · Jun 25, 2015

Cranium said:
Just got my Defender 90 200dti back from having a recon engine fitted, the temperature looks high to me, but it might have been low before, they had to fit a new coolant temperature switch.

As I haven't driven many defenders I don't know what is normal, what do you think?

My 2.5td sits right in the middle steady as you like. Pretty sure Marts 200Tdi is the same.

Did you get that turbo sorted?

vilguy · Jun 25, 2015

my 200tdi in my csw sits close to that since i fitted a thermostat which doesnt open till its much warmer. Might just be something like that.

Does it sit there at that or move around?

FMog · Jun 25, 2015

I have never seen mine that high, not after being stuck in slow stop-start traffic in hot sun for hours, not after long runs, nor after doing very slow and long serious hill-climbs. It usually gets up to around the halfway point at the most. Have you checked to see if your coolant is flowing? Does the engine or radiator pipes actually feel as hot as the gauge would suggest?

Cranium · Jun 25, 2015

The garage advised me to remove the coolant cap and squeeze the pipes, to dislodge a possible air lock, otherwise if it persists, to change the thermostat.

It did drop but only a little...

top drive · Jun 25, 2015

Looks like wrong sender to me

Cranium · Jun 25, 2015

Turboman said:
My 2.5td sits right in the middle steady as you like. Pretty sure Marts 200Tdi is the same.

Did you get that turbo sorted?

Had them fit a new turbo, thanks for asking, may have paid a bit more than doing it myself, but it is covered by their warranty, parts and fitting...

Also no risk of the old turbo being blamed or actually causing problems.

trax · Jun 25, 2015

top drive said:
Looks like wrong sender to me

+1

you have to match the sender and gauge

but to make sure, just feel or use a temp gun on the engine.

you can tell a stuck shut thermostat, the pipes and rad won't all be hot

TheQ · Jun 25, 2015

I'm no expert on landrover but if your vehicle had a non turbo engine originally then you have a mismatch between types of meter and sensor. And your old 200tdi may have had the correct sensor for that meter.

Foxyred · Jun 25, 2015

Mines bang on in the middle

mikescuba · Jun 25, 2015

My 200 tdi sits about half way on the gauge. When I had an electric fan it would get up to about the same as in your photo when the fan would click in and bring it down. That would only happen when worked hard in the desert. With the viscous fan the temp just sits there no matter what the engine is doing. I have been through three sender gauges and four thermostats to try an increase the temperature for the heaters but it still just sits there half way up the gauge. You should be able to feel if the engine is running hot. Normally you should be just able to hold the water pipes when the engine is at normal running temperature. you can also smell if the engine is hot. Causes could be a mismatch between gauge and sender unit. Airlock in the cooling system. How many miles have you done on the new engine?

Cranium · Jun 25, 2015

Been to the local Land Rover part supplier and they have said the same, either air lock or temperature sender.

Discussing it we are more of the opinion that it is the wrong sender.
The 'coolant switch' was changed by the garage as the gauge wasn't working when they took it for a test drive.
I have tried squashing the pipes with the coolant lid off to dislodge an air leak which had made no difference and tried topping up the radiator directly, but that was full.
It doesn't seem all that hot and when running the gauge stops rising at the point shown on the image.
I have a temperature gun but don't know what temperate I should see?

Cranium · Jun 25, 2015

mikescuba said:
My 200 tdi sits about half way on the gauge. When I had an electric fan it would get up to about the same as in your photo when the fan would click in and bring it down. That would only happen when worked hard in the desert. With the viscous fan the temp just sits there no matter what the engine is doing. I have been through three sender gauges and four thermostats to try an increase the temperature for the heaters but it still just sits there half way up the gauge. You should be able to feel if the engine is running hot. Normally you should be just able to hold the water pipes when the engine is at normal running temperature. you can also smell if the engine is hot. Causes could be a mismatch between gauge and sender unit. Airlock in the cooling system. How many miles have you done on the new engine?

I have only done about 15 miles...

Cranium · Jun 25, 2015

trax said:
+1

you have to match the sender and gauge

but to make sure, just feel or use a temp gun on the engine.

you can tell a stuck shut thermostat, the pipes and rad won't all be hot

I have a temperature gun, what should it read if I point it at the engine?

trax · Jun 25, 2015

Cranium said:
I have a temperature gun, what should it read if I point it at the engine?

think a 200 is a 88 stat. go point it around where the sender is. you'll lose a few degrees measuring on the surface and that's the stat opening temp but it should be around there.

Cranium · Jun 25, 2015

64 degrees centigrade when then gauge reached the red mark as it did before, shown in the image, the gauge reads just on the red no higher, so should be about 70 or 80 once fully up to temperature, will leave it for longer and check again...

trax · Jun 25, 2015

feel your rad and top/bottom hoses to make sure the stats opening and coolants flowing

Cranium · Jun 25, 2015

Top hose is 62 degrees centigrade and bottom hose is 45.

Just taken her for a 8 mile drive stopping periodically to check the temperature. Highest was 70 when I got back.

trax · Jun 25, 2015

if it was 70 and your gauge is in the red, then deffo wrong stat.

you got your old engine? was it another 200tdi defender they used?

and why 'they had to fit a new coolant temperature switch.' ?

mikescuba · Jun 25, 2015

you will find the temp for a 200 tdi is about 80. you can get higher thermostats at 88. I tried them both to try and improve the heaters in mine during the winter. Didn't make any noticeable difference. I run mine on 80 which was the recommend temp. Sounds like the gauge temp mix is the problem.

Temperature a bit high?

Active Member

Mab An Gov

Do'er of stuff and the like

Active Member

Active Member

Well-Known Member

Active Member

.

Well-Known Member

Well-Known Member

Well-Known Member

Active Member

Active Member

Active Member

.

Active Member

.

Active Member

.

Well-Known Member

Similar threads