and Warranty Statement
Single pulley alternator conversion $139
One option you might consider,
single-pulley fan conversion. Here’s the
deal:, The 3.6 spins the alternator and
fan at separate speeds with separate belts.
That was to accommodate additional electrical items on the
(climate control, stereo, etc).
On a normal 911 (through 1989), if the fan belt breaks, then the alternator stops charging and a light comes on on the dashboard.
964/993 has a central informer computer that will light a warning on
if the FAN belt breaks. It does this
with a sensor (wheel next to belt).
Unfortunately you have no such light.
If you want one then you need to install one.
Otherwise if the fan belt breaks then you
are going to ruin the motor. The
is to use a single belt to run the alternator and the fan.
If that breaks then the alternator light will
part is a Porsche Motorsports factory piece and, unlike competitors'
products, features studs which protrude through the fan and pulley
making belt replacement easy. If going this route also consider a
replacement fan belt. Installation involves removing the fan and
hub, generally easiest with the alternator assembly or engine removed.
the way, this also makes changing the belt easier, 3 nuts and you are
done. You don't even need the central bolt so there is no need
for the 12-point triple square that comes in the factory tool kits.
Lastly, it is pretty
much pointless to replace the lower pulley. On the 964
engines, that heavy pulley is also a harmonic balancer and highly
recommended for crankshaft life. On the 993 motors, the wight of
the additional pulleys is insignificant. You can get a
Motorsports lower pulley if the need arises but we don;t bother even on
our race motors.