Temperature Gague false reading trick? - Page 4 - Defender Source
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  #61  
Old April 18th, 2007, 09:10 AM
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I'll check my numbers, what you need to duplicate is a stock 1994 NAS D90 temp system.
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  #62  
Old April 19th, 2007, 10:55 PM
dkjbama
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Derek Johnson
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What is the VDO part # for the temp sender to fit a '97 4.0? I've seen several different answers here and other places. Is it the same as the sender for the tdi? Part #323-095?

Thanks so much to anyone who can help.
DKJ
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  #63  
Old May 27th, 2009, 01:09 PM
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Thumbs up

For anyone looking for a recent update on this issue:

I've had my NAS 110 for about a week and have put this issue at the top of my fix-it-list.

I visited Mike's instructions here - http://www.eastcoastrover.com/signalconditioner.html to clarify the parts numbers. I noticed that ECR does not currently stock the parts for the fix. A quick phone call and ECR informed me that LR has created some confusion on the exact temp sender part number that mates with the AMR2631 '94 D90 temp guage and have been shipping the incorrect sender. ECR hopes to have the issue resolved soon.

Mike, when LR starts shipping you the correct parts again please let us know. Thanks!
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  #64  
Old September 26th, 2010, 07:34 PM
Ronanmd1
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Jason
1997 D90 HS2.8
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Temp sender?

Hey guys - I needed to replace the water temp gauge in my NAS 110 and checked out the link on the ECR site - http://www.eastcoastrover.com/signalconditioner.html. The conditioner in my truck has been removed. I installed the AMR2631 gauge, but I am a little confused about which sender to use. I ordered sender part number PRC7918, but noticed that this sender is red, not white. Also confused that some of the previous posts state to use the AMR2631 gauge and PRC7918 sender in order to reproduce the set up in the 1994 NAS 90 trucks, but your site states that the PRC7918 sender "is found in most NAS Defender 110 engines will cure the problem and show you accurate coolant temp. information. This change duplicates exactly the later Defender 90 temp. gauge, a system that was designed without any signal conditioning."

I'm a bit confused as to which temp sender to mate with the AMR2631 gauge to give an accurate reading.

Anyone have a 94 D90 parts manual and can tell me the LR part number for the sender unit in that truck?

Any suggestions guys?

Jason
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  #65  
Old September 26th, 2010, 08:16 PM
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Quote:
Originally Posted by Ronanmd1 View Post
I'm a bit confused as to which temp sender to mate with the AMR2631 gauge to give an accurate reading. Jason
use PRC2506 (1994 NAS D90 temp sender) with the ARM2631 (1994 NAS D90 gauge)

Click Here--->http://www.roverparts.com/Parts/PRC2506.cfm
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  #66  
Old September 26th, 2010, 08:48 PM
Ronanmd1
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Jason
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Thanks John - much appreciated...

Cheers,

Jason
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  #67  
Old April 30th, 2017, 09:13 PM
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Quote:
Originally Posted by ECR View Post
The issue we found with Tdi set ups D90 is that you have to run the black temp sender. Most 300 tdi engines come through with a green sender and it is the wrong value for the NAS temp gauge.
Parts books (Euro ones) show the same part # gauge as an NAS 90 has mated to the balck sender. Once we installed that set up there have been no temp gauge issues. Run one in my own 90 and checked it in all conditions (Moab in the summer to Maine in the winter) with an infra-red tester and it was spot on.

Follow-up Post:

OK, I just gutted an 1994-1995 NAS D90 temp gauge. nothing odd inside, no signal conditioner, just normal gauge guts, same as an NAS110 guage I just gutted.

300 Tdi in an 1993-1995 NAS Defender. use a AMR3321 black sending unit mated to a AMR2631 gauge. Exact same set up as a Euro D90/110. Checked this against factory Tdi cars we service (the illegal type).

NAS 110s come with a AMR2070 gauge
1994-1995 NAS D90s come with a AMR2631 gauge

To cure (with factory parts) an NAS 110 temp gauge issue use the PRC7918 "white" sender that most NAS 110 have in them and mate that to a AMR2631 gauge and remove the signal conditioner.
Did this a few years ago on some 110s and put them through the ringer including up to 120 degrees at idle in our paint bake booth and the gauge told the truth as per manual checks with an infra-red hand held.

Hope that helps.
Man is to hot here!!
My '95 NAS D90 has one.
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  #68  
Old April 30th, 2017, 09:45 PM
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