Oil Pressure Reducing/Relief Valve - Replacement
88porsche02Subject: Replacing Oil Pressure Reducing
Valve and Pressure Relief Valve
Model
924S, 944, 944S, 944 Turbo
Group
1
Part Identifier
1724/1726
Number
8802
July 29, 1988
This bulletin replaces Technical Bulletin Group 1, Number 8802, dated June 30, 1988.
When repairing engines which have experienced bearing failure or damage resulting in metal contamination of the engine oil, the following non-serviceable components must be replaced.
Oil pressure relief valve PN 944 107 035 11 up to Model 87
Oil pressure relief valve PN 944 107 035 01 Model 87 on Pressure reducing valve PN 944 107 139 00 944S Model 87 on (in cylinder head)
In addition, all oil passages must be cleaned. See Technical Bulletin Group 1, Number 8614, Book C, page 35.
Refer to Technical Bulletin Group 1, Number 8626, Book C, page 61 for 944S cylinder head pressure reducing valve removal and installation procedures.