Engine - Revised Crankcase and Related Parts
83porsche03Subject:
Crankcase
Part Identifier 1010
Applies To 911 SC
1983-84
Group
10
Key Points
Introduction of new crankcase and related parts
C
Number
83-06
October 24, 1983
A new version crankcase is being used in production as of March, 1983.
Engine numbers are as follows:
911 SC 64D3717
911 Turbo (Canada) 67D0712
Part numbers: Old New
911 SC 930 101 915 00 930 101 917 00
911 Turbo 930 101 916 00 930 101 918 00
To increase crankcase strength, the removable oil filter screen and cover plate with oil drain plug have been eliminated.
Oil drain plug is now located on left side of crankcase.
Oil pump
With new engine crankcase, a new oil pump is used. This oil pump has a filter screen on the oil pick-up pipe.
New oil pumps
911 SC, P/N 911 107 008 05
911 Turbo, P/N 930 107 008 04
Old oil pump 911 SC P/N 911 107 008 01 911 Turbo P/N 930 107 008 02
Caution
If a new crankcase is used to repair an earlier engine, the new oil pump and intermediate shaft bore cover must be used.
Intermediate shaft bore cover
A new intermediate shaft bore cover is also being used. The cover is retained by 2 M6X16 mm hex head bolts and is sealed by an O-ring.
Cover P/N 930 105 165 00
Seal P/N 999 701 658 40
Bolt P/N N010 287.1
New repair procedures
Parallel alignment of camshaft sprockets
Because of the change in the intermediate shaft cover area, a new method of checking parallel alignment of camshaft sprockets is necessary.
Old Measuring Method:
New method Distance A is measured from front edge of crankcase to face of intermediate shaft.
Design distances between sprockets:
^ from face of intermediate shaft to face of rear camshaft sprocket (cyl 1 -3 ) = 98.07 mm
^ from face of intermediate shaft to face of front camshaft sprocket (cyl 4-6 ) = 43.27 mm
Design distance plus measured distance A = position of sprockets on camshafts.
Example: Measured distance A = 35.5 mm For sprocket of cyl 1 - 3 we have:
A + 98.07 mm or 35.5 + 98.07 = 133.57 mm (+/- 0.25 mm) For sprocket of cyl 4 - 6 we have:
A + 43.27 mm or 35.5 + 43.27 mm = 78.57 mm (+/- 0.25 mm)
Sprocket adjustment procedure is unchanged. Normally, 3 shims underneath left camshaft sprocket (cyl 1 - 3 ) and no shims underneath right camshaft sprocket.
Shim P/N 901 105 561 00
^ 0.5 mm thickness
CAUTION
Part numbers are for reference only. Always check with your Parts Department for latest parts information.