This
document describes how to replace the clutch on the Saab 900. We
recommend to use the factory turbo clutch kit for both turbo and non
turbo applications on cars up to 1990. (90 and up have separate
clutch kits, aren't interchangeable turbo to non turbo and do not
include a slave cylinder or release bearing) The part # is 8781346
and cost around $200.00 from the Saab dealer. You should replace the
pilot bearing located in the flywheel, the rear engine seal, and the
seal at the transmission end of the clutch. The pilot bearing and the
rear engine seal are not included with the kit and must be purchased
separately.
Getting
Started:
Parts:
8781346 The clutch
kit
9175902 The rear
engine seal
8346868 The pilot
bearing
8791618-10 The
special tool
Remove
the hood. 12 mm bolt at the hinge, one on each side. Put a blanket
or pad on the roof and transfer the hood to the roof. TIP:
Put the air tubes, covers and other parts in the hood on top
of the Saab as you take it apart.
Remove the negative
battery terminal
Remove the intake air
tubes that cover the black plastic protective clutch
cover
Remove the protective
cover: It has a 12 mm bolt at each side down low and two 10 mm
bolts in the face near the center and right side. The side of the
car is called as you set in the drivers seat. You may need to
remove the brackets that hold the battery cable and remove the
positive cable from the starter to get the cable out of the
way.
THE SPECIAL TOOL: Get a
pair of channel lock pliers "The one in the tool kit in the trunk
works well." Have a assistant push the clutch pedal all the way to
the floor, bite down on the extended neck of the release bearing,
release the clutch pedal and push down slowly as you insert the
spacer ring "special tool " into the pressure plate. Now it is
safe to remove the hydraulic supply line at the slave cylinder as
well as the three 5 mm Allen screws that hold it on. TIP:
If you don't have a assistant to help, get a pogo stick type
tool, a 2*2 works...jam it between the seat back and the clutch
pedal and adjust the seat back to tighten up the pedal to the
floor. I used this method for 10 years.
Remove the spring clip
at the end of the clutch shaft cover and extract the cover.
Tool Technique: Use a 15/16 shallow socket and a long 8 mm*
1.25 bolt. Put the socket end over the gear the clutch shaft
resides in and stick the 8 mm bolt with large washer through the
center of the socket to use as a clutch shaft puller. Note: you
must remove the plastic end bushing to screw the tool 8 mm bolt
into the clutch shaft.
Remove the clutch
pressure plate 13 mm mounting bolts. Pry the pressure plate free
of the flywheel as it is also retained by 3 short
dowels.
EXTRACTION:
Now push the slave
cylinder forward into the pressure plate and cram it all together.
Pry the works out through the left side. Tight fit huh? It helps
at times to turn the flywheel relevant to the dowel
pins.
After you get the
assembly out, remove the Special Tool. You need a press or
make shift squeezer to collapse the pressure plate to get the tool
out and insert the new tool into the new pressure plate.
Remove the 7 17 mm bolts
that hold the flywheel on and pry it out. Note: The position of
the flywheel dowel pin and position it at 11:00.
Remove the bearing in
the center of the flywheel use a driver or a punch to knock the
old pilot bearing out. Note: How the bearing is positioned
relevant to the outside edge of the flywheel. Use the old part as
a driver to hammer the new one into place. Don't install the new
bearing till you get the flywheel back from the machine shop after
it is resurfaced.
Remove the rear engine
seal. Use a old screw driver or seal extractor to pry out old
seal. Now a tricky part: Install special tool and push seal into
place. Or you can hammer the seal into place and it is a job in
such close quarters. If you mess up here the result is a bad oil
leak and it will contaminate the clutch disc so be careful and
make sure you work it in, little at a time, working around the
outside edges. Use a razor blade to clean the end of the
crankshaft off. Pry out the clutch shaft seal and pound in the new
one supplied in the kit. That little seal Is in there tight and
will take some doing to get out. Careful not to gouge the
housing.
INSERTION
Clean the threads on the
bolts that hold the flywheel to the crankshaft with a wire wheel
or brush and apply some sealer to each. We recommend Permatex #
518 anaerobic sealer for any sealing purpose on engines and
transmissions. Install the flywheel and the bolts that retain it.
Get those bolts snugged down quick as the sealer starts setting up
as soon as you screw them in and it could interfere with the
torque values. Work quickly, use a torque wrench set to 45 ft lbs.
Tighten in a cross pattern a little at a time.
Clean the surface of the
flywheel and clutch parts with brake cleaner. Put the release
bearing on the slave cylinder. Now put the clutch together "like a
sandwich" Note: The bulk spring section of the clutch disc faces
the pressure plate and the small spring hub faces the flywheel.
TIP: Use a small tapered reamer and clean out the three
small holes the locating dowel pins slide into to ease
installation. Look at the old pressure plate to see locations of
the holes. Insert the works. Lube the splines on the clutch shaft
with a good quality grease "synthetic or moly" and insert it into
the end of the transmission and through the clutch assembly. Use
several small screw drivers to help lift and position the clutch
disc to get the clutch shaft end into the pilot bearing. Once the
shaft enters the pilot bearing force the shaft home with a good
push or a tap from a brass hammer. Screw in the plastic end
bushing into the clutch shaft and install its cover. A slight
amount of silicone sealer on the rubber ring on the cover helps to
ensure against oil seepage. Now install the bolts that hold the
pressure plate and tighten to 18 - 20 ft lbs. It is a good idea to
put a dab of blue LocTite to the threads of each bolt.
Install the three 5 mm
Allen bolts that hold the slave cylinder on and use a slight
amount of anaerobic sealer on these also. It will help to use a
very small pair of channel locks to turn the Allens in most the
way and finish off with a Allen wrench that is hard to position
into the bolts.
Screw the hydraulic hose
into the slave cylinder "bottom hole" and put the bleeder nipple
in the top hole. BLEED THE SYSTEM: Bleeding is best achieved by
applying a positive pressure where you put the brake fluid in
while slightly opening the bleeder nipple. TIP: LoL... I
have in cases of emergency "on the road and the pedal fell to the
floor".... Take a clean rag and clean off the area of the filler
cap on top the master cyl. Take your mouth and apply a positive
pressure until a stream of brake fluid came out of the bleeder
valve ....lock it down. wait 5 to 10 minutes and you may be ok. It
is important to get all the air out of the system. Now push the
clutch pedal all the way down by what ever means you used
previously and EXTRACT THE SPECIAL TOOL. Test you clutch pedal for
compression and height. Most clutch pedals by the time a Saab
needs a clutch are worn at the pivot point of the pedal and clutch
master fork causing a low pedal and not complete clutch
disengagement. TIP: The Clovis pin that slides through the
pedal and fork use a 5/16 pin. Drill out to 3/8 and use a new 1-
1/8 long * 3/8 Clovis pin. That pedal will come right up with no
slop if done properly. In more severe cases it may be necessary to
weld it up and redrill.
Install the covers, air
tubes and hood back on and you are ready for the road.