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Today I swapped the small coolant pipes and hoses on the drivers side for the Boxster S ones. Unfortunately I did have to remove the radiator again, but it is more of a hassle than actual work. So the upgrade is done on the drivers side, other side to go (missing two hoses and a few clips which I'll need to order).
Having done this gives a better view of power steering hose routing options. The wheel well is quite full already with this coolant lines, brake lines, clutch line, some wires. Also it gave me a third option for the steering lines.
1. As above, take the lines from the pump directly through the bulkhead to the battery compartment area. Then either route on the front side of the battery or more along the reinforcement bars on the wiper side. In any case, it needs to go the drivers side where they can go down through the sheet metal. On the bottom side of the car they would fit to the original hoses. No additional crossing this way and actually quite neat.
Drawback seems that the separation between battery compartment and frunk becomes more compromised. But in any case there is only a rubber cap between now. Previously this was used for the CD changer wiring.
2. Likely needs to be revisited a bit. The approach would be to route 'behind' the spare wheel towards the bottom of the frunk where the lines can feed through to the steering rack area. They'll need a 180deg bend there, so I'd need to get a set of the rack to AN6 adapters. Still neat and tidy underneath the car, but the frunk will be less clean that way.
3. The new option is to route in the frunk, behind the amp directly to the drivers side. There it can go horizontally through the sheet metal to the wheel well. 90deg bulkhead adapters or 90deg hose fittings would get the lines down towards the steering rack. However, they would need to be routed on the wheel side of the coolant pipes. Not so nice, cluttered and unknown for clearance to the wheel.
For now I do think option 1. is a good compromise. Already checked the length of original hose and it will easily make it to the top where a bulkhead adapter would be placed. I'll need to check a bit more on the battery compartment side tomorrow.
It looks like I can go through the side sheet metal at the brake booster. N
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