New-Style Oil Cooler O-Rings

Documents the 1988 change from red to green oil cooler o-rings per Porsche Technical Bulletin 8813, with engine number breakpoints for the new-style o-ring installation across all 924S/944/944S/944 Turbo variants.

Difficulty: Easy1 min readApplies to: 944 · 944S · 944 Turbo · 924S

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Information

This document is based on Porsche Technical Bulletin 8813 dated June 10, 1988.

The o-rings used on both nozzles of the normally-aspirated car oil cooler element and on the connection pipe of the turbocharged car oil thermostat/filter housing were replaced by a new-style o-ring. The new-style o-rings are green; the old-style o-rings are red.

When replacing oil cooler seals, only the new green-style o-rings should be installed.

Part number for new-style o-rings: 999 707 043 40

Engine Numbers from Which New-Style O-Rings Were Installed

Engine Number (from)	Vehicle
46 J 06772	924S, 944 Manual Transmission
46 J 61599	924S, 944 Automatic Transmission
42 J 01420	944S
45 J 01753	944 Turbo
47 J 00899	944 Turbo S

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