Oh come on! This car is really taking the p!55 out of me now: One thing that I have discovered since owning this car is that range rover after market parts are quite possibly the worst parts that I have ever come across; but you can't go wrong with a pipe that goes from the engine to the oil...

Yes I am keeping my viscous; Glad you mentioned the spare space in the ecu housing, that is a perfect place to stick my relay :)

So I still haven't took the head off yet, although I have had the rocker cover off and cleaned out the mesh filter for the oil catcher. This is just a bit of info for people reading this thread in the hope of resolving their overheat problem: If you have a nanocom and set it to instruments it...

Thanks for clarifying that; it was just a passing thought.

I have been doing a bit of digging and (please correct me if I am wrong) it appears that the head was modified on the 99MY model. I guess that there was more to this modification than just the addition of a thermostatic switch. I have a sneaking suspicion that my ecu is out of a 99MY even...

I think you might be right, it is too consistent and requires too high a load for it to be likely to be the gasket. To give you some idea I went over the same stretch of motorway today without the trailer tent and a fair bit faster but the needle never moved. As soon as you attach the trailer...

Ok, after a little trip out over the M62 with the trailer tent on doing 50 - 56mph max the temp got to 106.6 on the hills before I hit the heaters to help it a bit and it dropped down to 93 when the road leveled off. I am now almost certain that this is a head issue; hopefully the gasket, if...

I hadn't, I'll have a look tomorrow.

At idle for an hour after a fully warmed up run it sat at 95.0 occasionally rising to 95.7 and then going back down again as the viscous fan kicks in and out. Driving around relatively flat country lanes it would go up to 97.8 give or take which I reckon is perfectly normal. I am going to...

:) I always put the heater on when it gets to 105 because I don't want to risk it going any higher, but it would if I gave it the opportunity. When I put the heater on it cools down again. Coming off a motorway is fine, it does not overheat. It is literally only when going up a steep hill that...

This is a 97, the heater matrix gets very hot so I guess it isn't clogged. As they did a mod to kick the aircon fans in at 105 did they have issues with the early ones overheating when they came out of the factory? If so then it is probably as good as it gets and I am p'sing up hill in wind...

Yes, pump static timing has been adjusted but only a little (it hasn't been moved far enough to cause the hot start issue yet). Temp is being measured with nanocom. On the gauge the needle will only go over the centre if under heavy load (not necessarily fast driving, but very steep hills will...

Modulation is sitting at around 47 when idle but it has been adjusted to compensate for a bit of timing chain stretch if that makes a difference. If you rev it from idle you get particulate type black smoke out of the exhaust for a brief period but it clears up pretty quick. I think that...

i have checked just about everything now. I have had it on test for a week and I can now tell you where I am on my way to work and back by looking at the temperature gauge. It is not overheating in the real sense of the word unless I get on a major hill, but next year my better half is going to...

So would I, but this is a Range Rover P38 so I am not taking anything for granted ;). It is definitely not boiling up. That's the odd thing. If I were to ignore the gauge then it is running perfectly. I would have suspected a faulty sensor except that it only goes up when the vehicle is...

Today I took my rangie over snake pass and as I got up to the top it overheated (106). I pulled over onto a layby and opened the expansion bottle to a gentle and fairly brief hiss like you would from any normal car. The viscous fan was going for it and all seemed well. By the time I had got...

Yes, I'm running nipple up :D . I gave it as much stick as I dare today and the gauge did not move from 12 o'clock once it had warmed up. After about 70 miles I got back and opened immediately opened the cap on the expansion bottle which gave a slight gentle hiss as I would expect on any car...

So today I took the radiator out (Again) and it does have a baffle inside (still seems a little cool at the bottom for me but, hey ho!) Anyways I swapped the thermostat for a genuine one while I was at it; don't know what called me to do it, but it did make a difference. On a serious hill at...

Yes it's a diesel, I haven't checked to see if it has baffles in it or not but in my opinion it is nowhere near hot enough at the bottom. If the stat opens at 80 I would not expect it to get much above 95 even at max load. To be honest the only other thing that it could be is the head gasket...

As time passes I am building up quite a collection of spared bits that there's nothing wrong with. Viscous fan Radiator and Thermostat This time. I have just bought an aftermarket britpart radiator and fit it over the weekend because I had overheat issues when towing, even though I had...