Fitting a 97 NAS A/C to a 300tdi? - Defender Source
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  #1  
Old July 18th, 2006, 03:36 PM
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steve
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Fitting a 97 NAS A/C to a 300tdi?

Any experience on this matter? what about the cpu? hoses probably won't fit but that's easy enough... any other concerns?
All input greatly appriciated

Thanks all
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  #2  
Old July 18th, 2006, 04:32 PM
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George Kase
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I'm just about to do this so I'll be interested too...I do know that I ordered my 300Tdi with the neccessary brakets and belts and compressor already attached to the engine, so that I know is at least step one...mounting the compressor with the right Tdi parts and belt...
George
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  #3  
Old July 18th, 2006, 08:26 PM
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Jim Cheney
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Easy stuff really, I emailed Steve some info. I've got a wiring diagram and can pretty much tell you what to do step by step if you can follow wiring.
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  #4  
Old July 19th, 2006, 09:30 AM
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Arthur Maravelis
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Although most think the 97 NAS setup is best in a Tdi, I will say:

I installed a Tdi system in my Tdi. There are two switches controlling it - a blower and an AC temp control. For AC you turn both on.

However, the temp control also has a zero setting - not engaging the AC. Why is this good? If you pull down the regular heater control lever and turn on the "AC" blower you get GREAT heat flow down below. Yes, you actually get excellent heat flow in a Tdi - where before the regular heater was barely adequate.

Now, I did not install the system so don't know the particulars but it seems the way it's connected to the heater vents allows for better heater performance. If it's simply a matter of another blower connected to the vents then a better stock blower should be the cure for the stock setup or a better matrix - both upgrades not easily implemented with off the shelf parts.

So, in the end, I prefer the Tdi setup with the controls in the middle NAS position. This is not difficult to do but I didn't bother.
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Old July 19th, 2006, 09:38 AM
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Bryan Tate
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I bought a TDi system from RDS and installed it myself in a few hours (except the fitting, and charging the lines) it did not tap into the heat vents (this was 3 years ago). It was almost identical to the 97 system except the hoses and compressor mounts were different. I actually purchased a 97 system and looked for the missing parts, I found them difficult to find so I sold the ac and bought the TDI kit. Worked great.
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  #6  
Old July 19th, 2006, 09:47 AM
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George Kase
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Bryan,
what was in the Tdi kit that wasn't in the 97 kit?
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Old July 19th, 2006, 09:54 AM
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Arthur Maravelis
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Bryan, So your old vents go straight down through the AC or do they also feed the AC vents? Mine feed both - the two down holes and the AC vents.

At the very least, it seems more air pulling power through the stock matrix generates much better heat - as it should. So, the stock blower is inadequate. Which also suggests that replacing the stock blowers in any Defender should generate much better heat.

For a while I thought the Tdi AC had another heater matrix in there because the heat was so good!
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  #8  
Old July 19th, 2006, 09:55 AM
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Bryan Tate
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From memory the compressor mount bracket was the major thing, the hoses were different also.
I believe I could not find a compressor mount so I bellied up and bought the new kit.

I may have the directions from the TDI kit, if I do I could fax them to you......

Bryan
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  #9  
Old July 20th, 2006, 01:32 PM
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steve
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thanks for the help guys... i may be e-mailing for some more help in the future.

Re: Heat.. After I replaced my hearter core my heater rips! Super hot air, flow is not an issue because the air is so damn hot.
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  #10  
Old July 20th, 2006, 02:06 PM
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Super hot air from a Tdi? Really?! Then again you're in NV - brutal winters there.
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  #11  
Old July 20th, 2006, 02:59 PM
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steve
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Reno does not get that cold... but I spend a lot of time in Tahoe in the winters... plenty cold there and it really is super hot air... mabye I have something to worry about. For my information... does your tdi seem to heat up a bit after running on the freeway for a while?
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  #12  
Old July 20th, 2006, 03:59 PM
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Diesels build up heat when under load. If you have the engine loaded (like on the highway) it will warm up. But if it is parked idling it will stay cool.
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