temp sender help please

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spatuk

Active Member
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193
hi, i need a little help again, ive had a disco 200tdi fitted into my defender 90, and yes i know i need to change the sender and ive been told there are two to choose from, a course thread and a smooth thread, ive taken the old one out but how do i tell which ones which when i dont have anything to compare it with ?
regards , i hope that made sense
 
I'm in the same boat. Just looked up PRC6663 and this is the description.


Water temperature sensor part number PRC6663. This fits the 2.5L Turbo diesel engine in the Land Rover Defender upto V.I.N WA159806.
Please Note: This will not fit the Tdi models.

So, is it the same thread but different electrical response?

Just Curious.
 
Right lads do you want to keep the vague land rover one or you can go for an aftermarket one where you get sender and gauge that read in degrees?

I replaces the gauge for a Time one which came as a pack. A disco engine typically sits at 85-87 degrees and you can see that better with that gauge.

http://bit.ly/19f61gb

Pretty sure this is what i fitted. The gauge is easy to fit and sits in the same slot as the old one. I went through several sensors before i got the right one. As for sensor its handy to see whether the old sensor is course or fine.
 
Buy temp sender PRC6663 and see if that sorts it, it should do. They're not expensive so you won't be out of pocket if it doesn't work, and if it doesn't ill buy it off ya cos I need one anyway lol
 
Sorry to hi-jack the thread but I bought a AMR3321, totally wrong thread size, bought a PRC6663, this one fitted but worse performance as green one as fitted. I am now wondering if my dash has been replaced with a different one, so the temp gauge is not the right one! The symptoms are reads very high and very sensitive to change ie rev the engine and the needle goes off the scale. Puzzled. Is there a voltage stabiliser somewhere?
 
Check that your earths to both block and bulkhead are sound, and that you have a clean 12V feed to the gauge.

If they are OK, check that the voltage from your alternator is between 13.8V and 14.4V
 
Get an aftermarket sender and gauge kit. Need a 16tpi thread on it or and adapter which is a couple of quid. Make sure the gauge is a 52mm one as this will fit straight into the dash. The landy gauge is random and doesn't really tell you much.

After market gauges tell the exact temp.
 
Sorted!!!!

Turned out it was the wiring from the sender to the gauge. In the end I just disconnected the original wiring from the gauge and fitted a new one direct to the sender. Happy days... Reads like it should with a PRC 6663 sender Yippee at last. Anybody want a collection of naff senders that don't match the original gauge. I confirmed the temperature with a IR thermometer and a strap on probe. Probe read about 60deg C on the outside of the top hose and the IR read 81 deg C at the thermostat elbow, gauge read where it should in the middle of H and C. I also checked the viscous coupling using a tacho and it is shot. Reads about half RPM even when bi-metallic strip heated with a hot air gun to 90deg C. So next on the list...... but I do have an electric fan as backup. Belt and braces. This was somebody else's conversion so god knows where the wiring goes to, but I do now:)
 
deltacharlie26 said:
Sorted!!!!

Turned out it was the wiring from the sender to the gauge. In the end I just disconnected the original wiring from the gauge and fitted a new one direct to the sender. Happy days... Reads like it should with a PRC 6663 sender Yippee at last. Anybody want a collection of naff senders that don't match the original gauge. I confirmed the temperature with a IR thermometer and a strap on probe. Probe read about 60deg C on the outside of the top hose and the IR read 81 deg C at the thermostat elbow, gauge read where it should in the middle of H and C. I also checked the viscous coupling using a tacho and it is shot. Reads about half RPM even when bi-metallic strip heated with a hot air gun to 90deg C. So next on the list...... but I do have an electric fan as backup. Belt and braces. This was somebody else's conversion so god knows where the wiring goes to, but I do now:)
Click to expand...
Stap on probe?? oh er misses;)
 
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