Temperature guage what do u normally see ?

[hiltonig]

What temps do u see normal running like today ? 70, 80 ?

[Alexdaredevilz]

90, give or take 5 degrees,

Do the Range rover mod!

[Overhere]

The standard sender gave me that reading, I agree, hook to the Rover sender with a 100 ohm pot, measure the temp with an IR gun and set the reading to that

[haircutmike]

With the RR mod mine reads 88-90 all day long, even in traffic.

The only thing that fluctuates is the oil temperature which generally reads 70-80 deg and a little hotter on track.

[sparkythecat]

What is this Range Rover mod?
I've tried google but it didn't help

[haircutmike]

sparkythecat said:

What is this Range Rover mod?
I've tried google but it didn't help

4 wheel drive, a suspension lift and a snorkle .

Any more info and I would have to kill you .

[haircutmike]

There is another sender on the top, front nearside of the inlet manifold near No 1 injector.

Use this instead of the existing one below the front of the thermostat.

You have to put a resister(?) in line with the connector to obtain the right reading on the temp gauge.

Someone will come along and inform us what it is, I got it but can't remember!

[Alexdaredevilz]

Do you mean a resistor?

[haircutmike]

Alexdaredevilz said:

Do you mean a resistor?

Listen smartie, I am a fully paid up member of the spelling Polizei and am allowed the odd error, it's in the rules .

[TVR Thunder]

Mine will sit at 80 when stationary or in slow traffic, fans come on and it drops to around 75. This continues every 4-5 mins.

I have never seen my gauge go above 85, and If im giving it some beans it will drop to 70!

I do have the mod-wise kit fitted (otter switch & thermostat)so i'm sure without this I would be seeing higher temps.

[dbv8]

For a few months last year mine would read 100 from cold and rise off the scale!
It has rectified itself now and reads 70 cruising and rises to 90ish in slow moving traffic.

[Goaty Bill]

haircutmike said:

Alexdaredevilz said:

Do you mean a resistor?

Listen smartie, I am a fully paid up member of the spelling Polizei and am allowed the odd error, it's in the rules .

1) use MS Internet Exploder one last time...
2) download Mozilla Firefox or Mozzilla Chrome
3) download/install the 'Add-on' British English Dictionary 1.91.1
4) do yourself a favour while there (Add-ons page) and install Adblock Plus 2.0.3
5) say good bye to MS Internet Exploder forever

It wont stop you from using the wrong "to", "too", "two", but it will tell you that "haircutmike" isn't a word

[dbv8]

Goaty Bill said:

1) use MS Internet Exploder one last time...
2) download Mozilla Firefox or Mozzilla Chrome
3) download/install the 'Add-on' British English Dictionary 1.91.1
4) do yourself a favour while there (Add-ons page) and install Adblock Plus 2.0.3
5) say good bye to MS Internet Exploder forever

It wont stop you from using the wrong "to", "too", "two", but it will tell you that "haircutmike" isn't a word

[ChimpanLucky]

The Range Rover temp sender mod is definitely the way to go, my Chim always showed 65-70 degrees cruising on a cold day which just seemed wrong to me.

It also appeared the coolant was taking way too long to reach operating temperature from a cold start even though the heater started to deliver warm air within minutes of starting.

Clearly there was something amiss with the temp sender.

Finally my original TVR temp sender packed up so I thought I would give the Range Rover sender + resistor idea a go.

Bought a 0-1000 Ohm variable resistor from Maplin for £1.62 and a new Rangie thermistor from EBay for £3.50.

Before fitting I double checked the temps with my infrared thermometer gun at both the rad where the otter switch is mounted and also just after the thermostat.

This confirmed my fans kick in at 84 degrees and control the true coolant temperature between 80 to 85 at hot idle never rising to more than a shade below 90.

That test confirmed what I expected, irrespective of what the TVR sender & gauge was telling me the cooling system actually works perfectly.

So I fitted the variable resistor between the Range Rover sender and the existing sender wire then trimmed it to get 84 degrees on the gauge as the fans cut in.

Double checking again with the infrared thermometer in both reference points confirmed everything was spot on.

The fans dragging the temperature down to just over 80, then back up to 85 before the fans chimed in again, the system controlling the idle temps within a 5 degrees range seems very good to me.

Pleased with the initial results my only concern was weather the RR sender, resistor & gauge combo would show temperatures above 90 degrees.

Bit scary this bit ....I disconnected the otter switch and watched the temperature slowly rise to 95 degrees on the infrared thermometer.

Jumped back in the car & bingo, the gauge showed just over 95 degrees.

Bottled it at just over 95 & switched off, re-connected the otter switch saw the gauge fall back to a steady fan controlled 82-85 degrees on the TVR gauge & all again confirmed by the infrared thermometer.

It took a bit of initial twiddling of the variable resistor to achieve the desired result, in fact I did it twice just to confirm the resistance value.

In both tests the variable resistor value required to exactly match the gauge scale was 170 ohms.

The variable resistor will stay put until I get myself down to Maplins for a fixed rated 170 ohm resistor.

TBH I was concerned the curve wouldn't be accurate especially above the 85 degrees running temperature, not showing a critical rise above normal running temps would be useless & potentially very bad news for the engine.

But I needn't have worried, up to 95 degrees on my infrared thermometer the gauge still tacks the correct temperature exactly and I can see no reason why it wouldn't keep climbing.

The only time previously my car has got near 95 was when one of the fan connectors failed so I was just running a single fan, when this happened I shut down & fixed it.

(95 degrees being my self imposed maximum temp I am prepared to let the engine run at).

I know completely trust the new set up.

Many thanks to Alex & the other guys that came up with the idea of using the Range Rover temp sender with a resistor.

For the massive outlay of a fraction over £5.00 it's proven to be way more stable & accurate system than the TVR blind spur mounted sender.

The needle rises much faster now too, you can actually see the car warming up properly, on a cold day run the reading always sits between 80-85 degrees not the incorrect 65-70.

Nice one

[haircutmike]

Eloquently put!

There are a couple of spelling errors but as you "nailed" it, we won't send the boys around.

[ChimpanLucky]

haircutmike said:

Eloquently put!

There are a couple of spelling errors but as you "nailed" it, we won't send the boys around.

Thanks Pewter, ow abouut a noice pictuure to?

[earthian]

Hi everybody,

Very nice info here. Thanks a lot. Now as I am about to start fixing my own cooling issues and do a general 12k mile service I am thinking to apply this mod too.

The question I have however, where do you measure the temperature? Which spot of the engine do you aim your IR thermometer to? Sorry for asking a possibly stupid question, I just want to double check if my own thoughts about this are correct..

Best Regards!
Andy

[zed4]

With regards to the post above and taking it up to 95 degrees, the VX220 we had often rose to over 100 degrees in traffic without issue. Up the Alps it rose to 116 degrees! The coolant system is held under pressure so won't boil at 100 degrees.

[SILICONEKID350HP]

I compared the temps next to the Tuner studio ,what I did notice the guage is very sluggish to go past 50 degrees but the tuner studio picks up temperature a lot quicker.

The engine warms up quicker than you think ..

[jojackson4]

Thinking of doing the range rover mod are the gauges all the same resistance wise?
I have a mk 1
Make of gauges I don't know