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Geoff123 · Joined: 12 Apr 2021 Posts: 3 Location: The Netherlands

Hi all,
I have to place new brake lines on my '78 924. The previous owner already removed them but I can't find a good picture/overview online which discibes how the brake lines are placed under the car. The master cilinder has 3 connections. Where do they go to?
Hope somebody can help me. Thanks!

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Try downloading the PDF parts catalog from Porsche as a start. It illustrates stuff like this pretty well.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

Geoff123 · Joined: 12 Apr 2021 Posts: 3 Location: The Netherlands

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Looks quite clear to me.

Illustration 604-10 shows LF port of master cylinder going to LF wheel, and rear port of master going to a T junction (part 8), with a line coming off the T to the RF wheel.

Illustration 604-15 shows RF port of master cylinder going to a two way junction, then to the RR wheel. Part 3 (a brake hard line) also attaches to the T from 604-10, then to another two way junction, then to the LR wheel.

The car is plumbed in an X-split configuration, with the front circuit of the master feeding pressure to the LF and RR (through two ports), and the rear circuit of the master feeding pressure to the RF and LR (through a single port and T fitting).
_________________
Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3