P9021 alternator belt tension spec?
#1
Burning Brakes
Thread Starter
P9021 alternator belt tension spec?
I know, this is being ridiculously ****, but a fellow 968er has graciously loaned me his P9021 tool to use to tension my balance shaft belt, but I figured that as long as I have it, I might as well use it for the alternator/AC belt as well, but I haven't been able to find the spec in the workshop manual. Anybody know what it is? Thanks.
#2
OkRider
Rennlist Member
Rennlist Member
Cloud, I think you mean special tool 9201. I have a little book called Porsche Technical Specifications Types, Dimensions, Tolerances. For the 968 and 968 CS. On page 36 verbatim.
Belt Adjustment Values-Engine
Belt Type Scale values on special tool 9201
Balance shaft toothed belt
Adjustment and check value:
for roller with oblong hole 2.7 +/- 0.3
Alternator drive belt
Adjustment and check value:
6-rib "poly-rib belt" 9.5
without air conditioning
6-rib "poly-rib belt" 9.5
with air conditioning + 1 revolution at the tensioning strut
V-Belt Servo Pump
The tension must be determined Belt should give by approx. 5 mm
by thumb pressure on the middle
of the belt:
V-belt dimensions
V-belt for servo pump 9.5 x 950
Poly-rib belt for alternator K6 720 Lw
Poly-rib belt for alternator K6 1000 Lw
and air conditioning compressor
Anyway that is what the book says. I hope this helps. Me, I just tightened the V-belts till they "felt right".
Doug
Belt Adjustment Values-Engine
Belt Type Scale values on special tool 9201
Balance shaft toothed belt
Adjustment and check value:
for roller with oblong hole 2.7 +/- 0.3
Alternator drive belt
Adjustment and check value:
6-rib "poly-rib belt" 9.5
without air conditioning
6-rib "poly-rib belt" 9.5
with air conditioning + 1 revolution at the tensioning strut
V-Belt Servo Pump
The tension must be determined Belt should give by approx. 5 mm
by thumb pressure on the middle
of the belt:
V-belt dimensions
V-belt for servo pump 9.5 x 950
Poly-rib belt for alternator K6 720 Lw
Poly-rib belt for alternator K6 1000 Lw
and air conditioning compressor
Anyway that is what the book says. I hope this helps. Me, I just tightened the V-belts till they "felt right".
Doug
#3
OkRider
Rennlist Member
Rennlist Member
Shoot, the computer compressed the information. The number values should be a ways to the right. Sorry, I hope it makes sense.
Doug
Doug