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Heater control boxes removed - advice needed

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Old Aug 11, 2015 | 09:18 PM
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Default Heater control boxes removed - advice needed

Having now had the 993 back for the past month or so I have just been enjoying it and driving as much as possible.

Being winter in the southern hemisphere I had the occasional opportunity to try and use the heater, but no heat - I thought nothing of it as having been off the road for a year it could have been any number of reasons.

Anyhow, after getting it up on stands this past weekend I discovered that my HK mechanic neglected to reinstall the heater control boxes and connecting hoses from the heat exchangers through to the heating tubes entering the cabin - all parts are gone and its unlikely I'll ever see them again...

I priced up the parts, but looks like it will just not be economic to replace unless some used parts come up cheap somewhere.

So, I'm trying to decide next steps given this. It never really gets so cold here that I can't live without the heater, but I wouldn't want to loose the ability to demist or to have A/C in summer.

I'm assuming I can now just remove the heater blower and heating tubes without effecting the ability to demist/use A/C?

Should I just plug the heating tubes where they enter the cabin? Any implications for this?

Thanks,
Ross.
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Old Aug 11, 2015 | 10:47 PM
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A little bit of clarification is needed. Are the missing parts those installed at the engine? Or, do they include the shutoff boxes that are installed in the footwells as well?

In the engine bay, under the car, are cast aluminum exhaust boxes for hot air. These boxes contain a gravity operated flapper valve that opens under pressure and then closes on engine shutdown. That assembly is attached to the aluminum heater tubes via a small length of heater hose. The heater tubes are hard mounted to the cars body via welded tabs. The heater tubes then transition into the body cavity via a formed length of rubber tubing.

If those are the parts missing, they should be available from a recycler. And since they are fairly light, they should be relatively inexpensive to ship to Australia.

If you are missing a shutoff boxes from the cabin, then you are in for some expense.
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Old Aug 12, 2015 | 07:27 AM
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Originally Posted by earossi
A little bit of clarification is needed. Are the missing parts those installed at the engine? Or, do they include the shutoff boxes that are installed in the footwells as well?
Thanks earossi for the detailed response!

The missing parts are circled below:



So not too bad - I'll certainly see if I can locate 2nd hand, but toying with the idea of just not bothering with the hot air.
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Old Aug 12, 2015 | 11:50 AM
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There are people who have sourced acceptable rubber hoses to use as substitutes for the orange factory ones, for next to nothing. The information is buried someplace here, I know I read it ages ago.

As for the metal ducts I agree w recycler idea.
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Old Aug 13, 2015 | 05:04 AM
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Originally Posted by EMBPilot
There are people who have sourced acceptable rubber hoses to use as substitutes for the orange factory ones, for next to nothing. The information is buried someplace here, I know I read it ages ago.

As for the metal ducts I agree w recycler idea.
Thanks, I agree, but so far only found at LA D. for $698 for both - seems pretty crazy and I might give that a miss.



If anyone has a set lying around after changing headers, let me know and I'll make you an offer
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Old Aug 13, 2015 | 08:19 AM
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Hello - there are at least a half a dozen of these on ebay right now, some w/ hoses and others without.

Regards,

.
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Old Aug 13, 2015 | 10:00 AM
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dc automotive has them for $250 each. I was talking to someone at local Cars & Coffee event a couple months ago who said they are willing to take 10-20% off if you make an offer. Worth a try.

Just have to ask. Why would your mechanic not install and toss them?

Dave
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Old Aug 13, 2015 | 01:35 PM
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Originally Posted by rosswj67
Thanks, I agree, but so far only found at LA D. for $698 for both - seems pretty crazy and I might give that a miss.



If anyone has a set lying around after changing headers, let me know and I'll make you an offer
I agree, thats just a stupid price...
Offer LAD $350 for the pair and be willing to go as high as $400.
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