NAS D110 Heater Core Removal - Defender Source
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  #1  
Old September 7th, 2007, 04:43 PM
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NAS D110 Heater Core Removal

I need to replace my heater core in the D110. I have done this before, but it was for a D90 (they are different).



Any tricks or “beware of…”?



Also, since it started to leak at the beginning of this summer I disconnected it. I then bypassed the heater core coolant hose with hose clamps and a hose barb. Since it has been bypassed I noticed that the AC works better than our new TDi VW Jetta.
Therefore I am wondering if I can use an inline shutoff valve in the summer and open it in the winter. But I am afraid that if the line to the heater core is blocked it could damage the water pump, or worse, starve a water jet.
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  #2  
Old September 7th, 2007, 05:08 PM
mpsteil
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Michael Steil
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Cant help on the heater core but my wifes 110 has two valves on the heater system because the previous owners mechanic could not get one valve to shutoff all the way. Why he went this route I do not know but her AC is colder than my 2002 F250. On my 110 the ac is shot but my heater shutoff valve does not close all the way and keeps the cab nice and warm when you dont want it.

Mike
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  #3  
Old September 15th, 2007, 11:42 AM
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Thanks Mike...

So anyone think that adding a shut-off valve would not be a good idea?
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1995 NAS Defender 90 AA Yellow #2986: Current
2009 Range Rover Supercharged Black/Black: Current

1993 NAS Defender 110 #375/500: Sold
1995 NAS Defender 90 Soft Top Beluga Black #2556: Sold
1991 Range Rover Hunter Green: Sold
1997 NAS Defender 90 Station Wagon Portofino Red #128: Sold
1993 NAS Defender 110 Beluga Black #215/500: sold
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  #4  
Old September 15th, 2007, 12:26 PM
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Doug Walker
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Yes, go with the shut off valve. The vacuum valve does the same thing -- you could replace that or check tos see if it is getting proper vacuum.
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  #5  
Old January 8th, 2014, 10:35 PM
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Bring this back to life.

Did you ever create that shutoff valve?
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  #6  
Old January 8th, 2014, 11:08 PM
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Rick Newman
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Huh? Heat and or a/c on a 110? What you talkin 'bout Willis?
Oh...the new ones....disreguard.
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  #7  
Old January 8th, 2014, 11:23 PM
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haha yes for the 93.

I know of another truck where the guy disconnects his heater core every year because he claims the AC works better. Just randomly ran into this thread and was wondering if anyone ever created a valve to simplify this switch.
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