Engine - Oil In the Cooling System

91porsche01

May 17, 1991


Model Group

944T/S2 1

Part Identifier Number

1737 9105


Subject: Engine Oil in the Cooling System


ATTENTION: Service Manager/Service Technician

This bulletin supersedes Technical Bulletin Group 1, Number 9001, Book G, pages 13 & 14.

Models Affected: 944 Turbo, 944 S2

Concern: Engine oil in the cooling system.

General Information: The VIN number /model year range in Technical Bulletin Group 1, Number 9001 no longer applies. This bulletin applies to all 944 Turbos and 944 S2's.

Figure 1:

Figure 2:

Service Information: Whenever the oil cooler thermostat housing is removed from the engine, whether for oil in the coolant or other repair, the depth of the connector pipe bore in the crankcase (arrow Figure 1) and the connector pipe itself (arrow Figure 2) must be measured.


Repair Information: 1. Measure the depth of the connector pipe bore in the crankcase.

Correct depth is 14.2 mm-0.4 mm

If the bore depth exceeds 14.2 mm, install spacing washer, Part Number 928 107 166 00, in the crankcase bore with Loctite 638.

Note: Clean washer and bore thoroughly to ensure proper cure of the Loctite.

Figure 3:

Repair Information (cont.): 2. Measure the connector pipe. Two versions of the connector pipe
were used in production. The version illustrated below, Part Number 951 107 152 03, can be identified by careful measurement. When repairing, use only the connecting pipe having the dimensions given in Figure 3.


Caution: Part numbers given in this bulletin are for reference only. Always check with your Parts Department for the latest information.

Warranty Information: R & R Thermostat Housing
Damage Code: 1737500002
Labor Operation: 17371900
Time Units: 430

Measure crankcase per Technical Bulletin Group 1, Number 9105.
Labor Operation: 17370150
Time Units: 20