TD5 Cooling - Allisport Radiator

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Originally Posted by OffTrack

Hamish

The thermostat on the D2 Td5 shouldn't even open until 82degC at which point the Td5 is considered to be "warmed up". There should be no flow of coolant through the radiator below that 82degC. If you are seeing 72degC maximum something is not right - possibly the thermostat is stuck open.

There was a recent thread on Td5 coolant temps. The consensus was that 115 degC was top end of the normal operating range and where coolant temps became excessive. Bear in mind that the thermostat isn't fully open until 96degC, so high 90s are well within normal operating range.

Cheers
Paul

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I am sure you are right about those being the temperatures that are considered normal....but its also "normal" to do head gaskets, and overheat.

Having said that, I hear your point on the thermostat...maybe the one I put in is not working correctly.

Really!! most TD5s are driven in to get their head gaskets done, the laminate gasket seldom actually fails completely.
More an issue with head movement and intermittent depressurization.
That said I am sure that those devoid of mechanical sympathy could completely stuff one.

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Originally Posted by Hamish71

I am sure you are right about those being the temperatures that are considered normal....but its also "normal" to do head gaskets, and overheat.

Having said that, I hear your point on the thermostat...maybe the one I put in is not working correctly.

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Originally Posted by djam1

Really!! most TD5s are driven in to get their head gaskets done, the laminate gasket seldom actually fails completely.
More an issue with head movement and intermittent depressurization.
That said I am sure that those devoid of mechanical sympathy could completely stuff one.

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I didn't think it was normal either, even with VNT. I do however think that there are ECU upgrades and there are ECU upgrades with regards to temps, particularly EGT's.

As far as I know head gasket failures are typically the result of a previous overheating.

That said, I've had a hell of a lot of my coolant radiator (and every other) blocked with mud and it hasn't overheated. The workshop couldnt believe it never ran hot.

Gday all.
Wondering at the moment how much life if left in my original radiator. 04 TD5 manual with 83000km. Regular coolant changes with demineralized water and OAT. Which is better, allisport or PBR? No overheating issues thus far but I do tow a big van.
Regards
Robbo.

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Originally Posted by OffTrack

Hamish,

When you say 72°C are you talking measured off the back of the head or water temp? If it's off the back of the head, have you checked what the temp sensor is reading using the Nanocom? It would be handy to know a rough differential between head temp and coolant temp if that's what is being reported.

cheers
Paul

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This is what the Welltempered maker says, Bob

Some testing done recently showed that the actual temperature of engine coolant differs from the read temperature by about 10 degrees at operation temperature. At first I had to think is this the sensor reading incorrectly? But how can they, since they are calibrated during manufacture to within 1%?

Further testing with the infra-read thermometer shows that the sensor reading is in fact spot on... on the surface of the housing where it's mounted. But there is a difference between the surface temperature on a coolant housing to the actual coolant temperature. Makes sense really.

Thing to keep in mind once you know what the standard operating range is to look out for when the temperature goes outside this .

If you are confident in your metal working ability to adapt a generic radiator to your LR then have a look at Speedway Motors offerings in the Street Rod section of their web catalogue. Miles cheaper than 600 pommy pesos.

Quote:

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Originally Posted by djam1

Really!! most TD5s are driven in to get their head gaskets done, the laminate gasket seldom actually fails completely.
More an issue with head movement and intermittent depressurization.
That said I am sure that those devoid of mechanical sympathy could completely stuff one.

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Smart arse:) So...language aside, we are all agreed that the td5 is known to have issues with over heating and the head gasket?

My point was..... this radiator runs considerably cooler than the oem one.
Can i say that?....is that ok?

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Originally Posted by Hamish71

Smart arse:) So...language aside, we are all agreed that the td5 is known to have issues with over heating and the head gasket?

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The Td5 is know for head shuffling which causes head gasket failure and over heating, and for suffering head damage if the cooling system fails in some way - burst hoses, clogged radiators and failed head gaskets (see above) are the usual culprits. The Td5 is not known for "just overheating" and none of these issues will be fixed by installing a **bling** radiator.

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Originally Posted by Hamish71

My point was..... this radiator runs considerably cooler than the oem one.
Can i say that?....is that ok?

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No, all you can say is you have something ****ed up with your radiator//thermostat install and you are getting full flow through the radiator all the time. When you've fixed your cooling system you'll have some worthwhile figures to share - at the moment they are worse than useless.

cheers
Paul

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Originally Posted by OffTrack

No, all you can say is you have something ****ed up with your radiator//thermostat install and you are getting full flow through the radiator all the time. When you've fixed your cooling system you'll have some worthwhile figures to share - at the moment they are worse than useless.

cheers
Paul

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SOme how it bugs the crap out of me when people throw rocks from the cheap seats, then sign of with "cheers".

Actually, there is nothing wrong with the "install". What might be wrong is a faulty thermostat. Unlikely because it is new, but not impossible, and not the first time a part from new hasnt worked.

As for the rest of your comment....
MY experience is an overheat as a result of a viscous fan disintegrating...followed later by by significant increase in blowby, and pressure in the coolant system.

MY experience is that there are a considerable number of people on here who have had temperature issues with their td5.

MY experience is that people go to a lot of effort to monitor their temperatures, fit engine saver alarms etc.

MY experience is that fitting a radiator with a claimed 30% more surface area has significantly reduced operating temperatures..

My DEDUCTION was that somone might want to hear about my experience.

I WILL, get the nanocom out on the weekend and see if either the temp sender is reading different to the ECU for some reason, OR, that the thermostat is not operating properly.

Any problems Paul, or would that be useless for you?

oh....Cheers :wasntme:

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Originally Posted by Hamish71

.....As for the rest of your comment....
MY experience is an overheat as a result of a viscous fan disintegrating...followed later by by significant increase in blowby, and pressure in the coolant system.
Not a TD5 fault in any way.Which is probably where the primary issue in posts is.
i.e
TD5's are not known or prone to overheating problems.

MY experience is that there are a considerable number of people on here who have had temperature issues with their td5.
Never seen any posts here with a TD5 suffering from temp issues with a serviceable standard cooling system.

Though as mentioned the early plastic dowel engines have a reputation for head movement, however, it is only an issue with an eventual overheat for those who notice the coolant loss, keep topping it up, hope it will be ok until one day they forget to check/top up the coolant or those who never check the coolant (or anything else for that matter) and then ...

MY experience is that people go to a lot of effort to monitor their temperatures, fit engine saver alarms etc.
Yes and most get a surprise at the peaks and range of opearting temps when compared to a normal temp gauge and this causes many a lot of angst.
Most modern engines like to run real warm compared with older donks, just bought new car which consistently runs at 103 to 105 regradless of speed etc. Old school motors and cooling systems would be having a fit at these numbers consistently.
Fitting an engine save isnt unique or a prerequisite for a TD5, I wish i'd fitted them to 2 previous non Land Rover vehicles, would have saved 2 motors, both of which, were not prone to overheating either.

MY experience is that fitting a radiator with a claimed 30% more surface area has significantly reduced operating temperatures..

Actually if the system is in good condition you cannot expect a claimed 30% cooler, but rather a claimed 30% improvement in cooling efficiency, as the thermostat will determine the engine temp operating range. It may be cooler at the radiator outlet but the thermostat will reduce the flow to ensure the engine temp increses or reduces to the "ideal" range according to the ECU parameters. If you are experiencing reduced operating temps(i.e lower than that which the engine ECU/system was deigned for) then the thermostat isnt doing its thing.

My DEDUCTION was that somone might want to hear about my experience.
Yes definetely, keen to know the differences in temps in a comparison to say new/good cond std system against the old removed system and the new bigger system with any data you may have .
Also keen to know if the new Thermostat was genuine or after market, curious if it is the same operating range too.


Any problems Paul, or would that be useless for you?

oh....Cheers :wasntme:

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Cheers:)