Got any detailed pics of 911 AC line routing?

[Andy Somogyi]

My 76 has some sort of crappy aftermarket AC system, lines are rubbing through on the right wheel well. I’d like to see how the later 911 SC routes the factory AC lines, and re-route these so they don’t rub.

This pic is in the right rear wheel well, looking up and forward.

Just running 6x16 Fuchs on all 4 corners, this is a narrow body car. Even with the stock wheels, they rub the lines.




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[FrankM_]

Hi,


That looks like a front compressor stuck against a sidewall ? No real airflow, so no real heat exchange can take place.

On my model 85, NONE of the A/C components are in the rear wheel wells. The receiver-drier is in the front wheel well near the drivers' door.

In general :
- compressor right of the engine fan/alternator
- short connection to rear condensor on decklid (right side)
- exit from rear compressor on left (driver's side) runs along the bottom plate to the front left wheel well where it is routed all the way around the well to the front condensor under the bumper (no front rubber chin spoiler - clear airflow onto the condensor + fan from above)
- the output of the front condensor is then routed back in the same wheel well to the receiver-drier on the back of the front wheel well (near drivers' door)
- the output of the receiver drier is then routed though an opening near the steering column (bottom of car, under protection plate) to the evaporator/blower assembly in the smugglers box
- the return line of the evaporator once again runs along the bottom plate back to the engine bay (passengers side) where it goes into the low pressure side of the compressor
not really going into the wheel well

Pics of the front left wheel well :

[BoxsterGT]

Here's a shot of a upgraded A/C system on a 87 911, with most all the hoses running along the Left Side.....



...since the Rt Side is needed for a Front Oil Cooler system. Sooner or later you will want to install a front oil cooler.

Len

[Andy Somogyi]

Originally Posted by BoxsterGT

Here's a shot of a upgraded A/C system on a 87 911, with most all the hoses running along the Left Side.....







...since the Rt Side is needed for a Front Oil Cooler system. Sooner or later you will want to install a front oil cooler.



Len

Thanks for the pics. I’m working out how to route the lines underneath. That’s smart how the newer cars added these jacking pads. Frankly that’s my biggest concern is the lines getting crushed when the cars jacked up, as without the jack pads, it’s not super clear where to put the lift. Especially if it’s some dumb kid putting the car up on lift at a tire shop.

I’m toying with the idea of welding on some jacking pads like this.

Anyways, good to know how the factory routed the lines and what they consider safe routing.





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[FrankM_]

Well, the factory A/C lines are often in the way of the jacking points. I have cut some wood to size to put into the right places. But sure enough, you need to spend some time looking & fiddling to get it jacked up without damaging the lines.
The A/C was clearly an afterthought and not designed in from the start.
I also hate how the compressor and its mount block me from easily replacing the oil pressure sender or even hooking up a mechanical oil pressure gauge (my dashboard gauge is frequently reading high and I just want to double check...)

[Jack Stands]

Folks have also discussed using some drilled out hockey pucks attached to the underside pan. Supposedly there are threaded hole in the floor pan that can be used to attach them (at least on the later G bodies).

[Dr J]

Looks like you have 4 choices:

1) raise the hoses so that they are over the condenser. This will require new lines.
2) lower the lines so that they run in the area that is deeper than the rest of the fender well.
3) replace it with what Griffiths sells or something similar to it.
4) get rid of the whole thing.

Seems 2 is the easiest.

[Canada Kev]

Originally Posted by Andy Somogyi

...my biggest concern is the lines getting crushed when the cars jacked up, as without the jack pads, it’s not super clear where to put the lift. Especially if it’s some dumb kid putting the car up on lift at a tire shop.

Simple solution: take only your wheels to the tire shop and eliminate any possibility of someone without the necessary knowledge jacking up your car under the AC lines OR oil lines.