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Hot!Missing engine bay ducting ?

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David gillett
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David gillett PCGB Member
2022/06/29 05:41:46 (permalink)

Missing engine bay ducting ?

Hi everyone one , thanks for welcoming me to your 911sc group, whilst I have owned various Porsches over the past 15 years or so I have never ventured into the air cooled section of Porsche ownership. I have just purchased a 1980 911sc targa which needs some love and attention. I am ok with all mechanical items but their seems to be some parts missing in the engine bay, I think is was may be a motor and some ducting for cabin cooling, is this a common item to be removed and if so what are your views on reinstalling the items , should I be able to find them

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flat6buster
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Re: Missing engine bay ducting ? 2022/06/29 08:56:14 (permalink)
Hi David.  Congrats on your new purchase.  RosePassion, Design 911 and others have exploded parts diagrams on their websites you could refer to.  Alternatively post a pic up and I'm sure someone will be along to assist with technical advice and lety you know what you're missing.
T911UK
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Re: Missing engine bay ducting ? 2022/06/29 11:30:20 (permalink)
Sounds like its ben back dated, a great upgrade in my view!
 
As said, post a pic

www.type911.co.uk
993 Turbo
964 C4
911 SC Targa - Backdate to 1971
911 SC Targa - Minted
914 1974 2.0
912 1968
356B 1962
Cayenne Turbo S
Boxster 987 2.7
NeilH
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Re: Missing engine bay ducting ? 2022/06/29 15:23:13 (permalink)
Hi David. 
 
Welcome, and hope you enjoy the SC - got a Targa myself 
 
The most visual ducting under the engine hood are two cardboard like tubes - they're in your face so to speak. They connect back to a black plastic T piece duct on the left - which is then fixed direct onto a blower motor. All of these components are the HOT air for the cabin. They take air off the side if the huge engine fan and split this cold air via cardboard ducts to each of the exhaust HEAT EXHACHANGERS to warm the air that's then sent down the sills to the front of the car.
 
 
If someone's fitted a sport exhaust without heat exchangers then all this ducting would be pointless and possibly removed? 
 
Possibly worth working backwards from the exhaust to determine any reason for a possible "delete" as opposed to just "missing"
 
Fresh air is all dealt with in a parallel system and blower motor under the front hood and behind the cardboard bulkhead panel
 
Picture hopefully attached - my ducts disconnected while I removed the motor for access to cold start injector.
David gillett
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David gillett PCGB Member
Re: Missing engine bay ducting ? 2022/06/29 16:28:13 (permalink)
NeilH
Hi David. 
 
Welcome, and hope you enjoy the SC - got a Targa myself 
 
The most visual ducting under the engine hood are two cardboard like tubes - they're in your face so to speak. They connect back to a black plastic T piece duct on the left - which is then fixed direct onto a blower motor. All of these components are the HOT air for the cabin. They take air off the side if the huge engine fan and split this cold air via cardboard ducts to each of the exhaust HEAT EXHACHANGERS to warm the air that's then sent down the sills to the front of the car.
 
 
If someone's fitted a sport exhaust without heat exchangers then all this ducting would be pointless and possibly removed? 
 
Possibly worth working backwards from the exhaust to determine any reason for a possible "delete" as opposed to just "missing"
 
Fresh air is all dealt with in a parallel system and blower motor under the front hood and behind the cardboard bulkhead panel
 
Picture hopefully attached - my ducts disconnected while I removed the motor for access to cold start injector.

Thanks for the reply Neil, that makes sense, I will have a look at the exhaust system first, it just didn’t make sense why those parts would of been removed, thanks for all the help from everroneous, regards Dave g


T911UK
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Re: Missing engine bay ducting ? 2022/06/29 17:10:47 (permalink)
They would all be removed if it was back dated. You will still have heating!

www.type911.co.uk
993 Turbo
964 C4
911 SC Targa - Backdate to 1971
911 SC Targa - Minted
914 1974 2.0
912 1968
356B 1962
Cayenne Turbo S
Boxster 987 2.7
fxm911
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Re: Missing engine bay ducting ? 2022/06/29 19:50:48 (permalink)
Hi David and welcome to the SC register.
 
Any chance you could put up a few pictures of your car and your engine bay so we can try and help you out ?

Franck MARIE
911 SC Register Secretary
David gillett
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David gillett PCGB Member
Re: Missing engine bay ducting ? 2022/06/30 06:25:32 (permalink)
I am just out of the country for the next four days. As soon as I get back I will load some photos to try and show my issue , regards Dave
T911UK
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Re: Missing engine bay ducting ? 2022/06/30 08:37:31 (permalink)
Does it look like this;


www.type911.co.uk
993 Turbo
964 C4
911 SC Targa - Backdate to 1971
911 SC Targa - Minted
914 1974 2.0
912 1968
356B 1962
Cayenne Turbo S
Boxster 987 2.7
David gillett
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David gillett PCGB Member
Re: Missing engine bay ducting ? 2022/07/03 11:23:24 (permalink)
Please see attached photos of items which I think should have something attached
David gillett
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David gillett PCGB Member
Re: Missing engine bay ducting ? 2022/07/03 15:19:56 (permalink)
Sorry everyone. Took me a while to get the photo's loaded. I think I have done it now.
post edited by David gillett - 2022/07/03 15:21:03

Attached Image(s)

richard.stephens-eosemi.com
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Re: Missing engine bay ducting ? 2022/07/03 21:57:04 (permalink)
The 'does it look like this' picture above is the backdated version which does not have an electric fan. The finger you are pointing at
is the holder bracket for the electric fan. You do not show the right side of the engine to see if it has been backdated or is left unconnected.
Usually on the SC both sides go to the electric fan output with the unconnected part you are pointing at going to the fan input.
Fans are quick expensive new. Perhaps find a 2nd hand part or go for the backdate option which will be cheaper.

Rich
911 SC Technical Advisor
David gillett
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Re: Missing engine bay ducting ? 2022/07/04 07:28:19 (permalink)
Thanks Rob, I think everything has been removed, I can see a wiring loom plug in that area which I assume connected to the fan, I think I am going to keep looking until I am 100% certain what I need, I appreciate your reply. Regards Dave
T911UK
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Re: Missing engine bay ducting ? 2022/07/04 08:53:28 (permalink)
Not a great pic! Looks like you need 1, 4 & 8 at least

 
post edited by T911UK - 2022/07/04 08:55:52

www.type911.co.uk
993 Turbo
964 C4
911 SC Targa - Backdate to 1971
911 SC Targa - Minted
914 1974 2.0
912 1968
356B 1962
Cayenne Turbo S
Boxster 987 2.7
fxm911
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fxm911 PCGB Member
Re: Missing engine bay ducting ? 2022/07/04 11:19:28 (permalink)
Hi, here is a pic of SC engine bay.
On this one the air pump is still present - on the left, so where your finger is pointing on your pic is just behind that pump and you can see the black plastic hoes that goes up to the fan.
 

Attached Image(s)


Franck MARIE
911 SC Register Secretary
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