Heater Bypass Tube. Part #
Thread Starter
Rennlist Member
Joined: May 2007
Posts: 3,100
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Heater Bypass Tube. Part #
In case anyone is curious. The part number for the factory heater bypass tube, the one in the engine bay is 993-211-941-00. I had expected a 964 number when I ran accross this a few days back. Ordered the part from Sunset and received it last night. It was an easy 25 minute install, and works perfectly. Bye-bye motor assembly and 5-6 Lbs. Nice!!!
Three Wheelin'
Joined: May 2010
Posts: 1,564
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I have a large hole in my heater tube where the tube has deteriorated - over near the engine fan blades. Can this cause any problems?
I dont really need heating. Can I delete the whole system? Is this the best way to delete, although it still seems to be a large tube and connects up the system just minus the blower.
I dont really need heating. Can I delete the whole system? Is this the best way to delete, although it still seems to be a large tube and connects up the system just minus the blower.
Three Wheelin'
Joined: Jun 2009
Posts: 1,767
Likes: 1
From: Bromley, Kent
I have a large hole in my heater tube where the tube has deteriorated - over near the engine fan blades. Can this cause any problems?
I dont really need heating. Can I delete the whole system? Is this the best way to delete, although it still seems to be a large tube and connects up the system just minus the blower.
I dont really need heating. Can I delete the whole system? Is this the best way to delete, although it still seems to be a large tube and connects up the system just minus the blower.
http://www.rennline.com/Rennline-RSR...ctinfo/M05.07/
Three Wheelin'
Joined: May 2010
Posts: 1,564
Likes: 1
Regardless of what I do, it looks like I also need an 'air duct for engine cooling fan' as this piece is falling apart ...
air duct for engine cooling fan
What does this part do differently to the usual set-up. It looks similar to 'christallon' part or the delete option from rennline ..
hot air duct
air duct for engine cooling fan
What does this part do differently to the usual set-up. It looks similar to 'christallon' part or the delete option from rennline ..
hot air duct
Three Wheelin'
Joined: Jun 2009
Posts: 1,767
Likes: 1
From: Bromley, Kent
Christallons part and your hot air duct link are the same thing
They duct air from the engine to the cabin, installing one just removes the fan assistence.
The Rennline kit is a complete heater delete, No heat will be ducted into the cabin if you install one
They duct air from the engine to the cabin, installing one just removes the fan assistence.
The Rennline kit is a complete heater delete, No heat will be ducted into the cabin if you install one
Three Wheelin'
Joined: May 2010
Posts: 1,564
Likes: 1
Thanks. It is starting to make sense 
for the hot air duct ...
where does the hot air go if it is a hot day and the cool air is blowing? is there a flap later in the system?
is there still enough pressure to pump hot air into the cabin? why have the blower in the first place?
Is there any impact to engine cooling with either option?
Would engine cooling be better with the delete option?
for the hot air duct ...
where does the hot air go if it is a hot day and the cool air is blowing? is there a flap later in the system?
is there still enough pressure to pump hot air into the cabin? why have the blower in the first place?
Is there any impact to engine cooling with either option?
Would engine cooling be better with the delete option?
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Joined: Jan 2007
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From: Vancouver Island, BC , Canada
In case anyone is curious. The part number for the factory heater bypass tube, the one in the engine bay is 993-211-941-00. I had expected a 964 number when I ran accross this a few days back. Ordered the part from Sunset and received it last night. It was an easy 25 minute install, and works perfectly. Bye-bye motor assembly and 5-6 Lbs. Nice!!!
Thanks
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Thread Starter
Rennlist Member
Joined: May 2007
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Go here http://www.porsche964.co.uk/ Click technical, then electrical repairs then heater bypass. All you need to know. The electrical part of the DIY is not necessary if you're OK with gravity fed heat. I find it's plenty here in Calif 
How are you?
How are you?
Pro
Joined: Oct 2005
Posts: 619
Likes: 2
From: Toronto Canada
There is a carbon one for less that looks good, thinking of saving for this one.
http://www.maxspeed-motorsports.com/964ip.html
I have disconnected my motor and use the existing part for air flow and I get plenty enough heat for our cold winters up north. I also did the relay jump so that I can still use the fans up front to control airflow.
http://www.maxspeed-motorsports.com/964ip.html
I have disconnected my motor and use the existing part for air flow and I get plenty enough heat for our cold winters up north. I also did the relay jump so that I can still use the fans up front to control airflow.
Pro
Joined: Jun 2009
Posts: 552
Likes: 4
From: Oregon
I did this recently and jumpered the relays too - many have experienced dead batteries due to some power drain when the jumpers are in place - but I have not. I left the resistor connected and disconnected everything else and no discernible power drain for me.