1.8T Quattro and FWD DIY clutch article.. WITH pics,... Please give feedback
Disclaimer- this write up was pieced together from Bently's, xr4tic's write up, and my own personal experience. It is presented merely as guide, and may not be totally accurate. I am not responsible for anything that may happen as a result of using this guide.
Also, please read step 14 very carefully, it will save you a lot of time.
It may be easier to list tools I DIDN'T use (all of these things are not necessary)
-Transmission jack (all you need is two, preferably three, people for the lowering and raising of the tranny)
Some "special" tools I DID use
-Wobble extensions (I got mine from ACE hardware, a 9" 6" and 3" extension help SOOO much, may also be called swivel extension)
-Torque wrench (mainly for the flywheel and pressure plate bolts, its hard to fit one of these suckers anywhere else)
-Jack stands (a MUST, and a good investment anyway)
-Impact wrench (you'll probably need it for the pressure plate and flywheel bolts because you'll just turn the engine with a conventional ratchet instead of loosening the bolts)
-Air ratchet (not a must, but it made it easier)
-Floor jack (while a transmission jack isn't needed, a regular floor jack is a must)
-Breaker bar (a two foot piece of pipe)
-6mm and 8mm allen sockets and wrenches
-Thread lock (for all the bolts on the axles and flywheel)
-Wire (used to hold the air box, AC unit, and drive shaft up and out of the way)
-8mm 12 point Triple Square bit (for Quattro)
-10mm 12 point Triple Square bit (for FWD)
The obvious (if you don't own these, stop now)
-Metric socket set
-Metric wrench set
-5/8 SAE wrench (5/8 = 16mm)
-5/8 SAE socket (5/8 = 16mm)
Any other tools that you may need you'll probably already have or be able to send someone to the hardware store to pick up in the middle of the project (screwdriver, allen wrench, vise grips, extra wrench or socket)
Before you start
If you are planning on using your stock flywheel, find a place in your area that can resurface it. Since our cars use dual mass flywheels very few shops can resurface them. It took me 3 days on the phone to finally track down a shop within driving distance that could do it.
Allow enough time to do the job. It took me roughly 15 hours to fully complete the job the first time, and about 9 hours the second time around. I had a lot of help from my Dad, and even some help from my brother when it came to putting bolts back it. This is no small job, so read this write up carefully and then decide if and when you're going to do this job.
Before you get the front wheels off the ground
1) Remove belly pan, and belly pan bracket
2) Back rear wheels onto ramps (If you're only going to jack stands on the front, disregard this step)
3) Disconnect battery
4) Disconnect coolant tank, this is done to gain access to transmission to engine bolts
- 3 Philips head screws on the top
- plug on the bottom
- top hose to engine
- leave the big hose on and swivel the whole tank out of the way
5) Remove air box, this is done to gain access to cat to turbo bolts (I sort of made up my own way but Bently's says..)
- Disconnect wires/and harness connectors
At solenoid valve for waste gate bypass regulator valve
At evaporative emission canister purge regulator valve
At power output stage
- Disconnect hoses and remove air cleaner housing
6) Remove all the transmission to engine bolts accessible from the top (only 2 or 3 bolts are accessible from the top)
7) Loosen bolts on the passenger wheel
Now, Jack up front of car and place your jack stands. Be careful not to put them in the way.
8) Remove passenger side wheel
9) Remove heat shield between the exhaust and drive axle, three 6mm allen head bolts
10) Make sure the cat has enough clearance for the transmission. There are 2 ways to do this. I took the downpipe off and then just loosened the bolts holding the cat to the Turbo. I did this to avoid having to take out the O2 sensors. If you have an O2 sensor wrench you can take the O2 sensors out (good luck getting to the lower one) and then remove the cat and downpipe as one piece.
11) Break the remaining engine to transmission bolts (refer to 2nd picture)
12) Remove the drive axle bolts. These bolts use that 8mm or 10mm 12 point triple square bit.
for FWD skip step 13 (you don't have a rear drive shaft)
13) Remove the drive shaft bolts. These are 6mm allen bolts and you'll have to jack the rear end up and turn a wheel to have easy access to all 6. (Remember to put the car in neutral, and take the E-break off while trying to turn the wheel)
14) Remove the starter bolts if you haven't already. There are 2 long bolts that's go into the tranny and a little 6mm allen towards the front of the car that holds a bracket with all the electrical stuff. The first time I stripped the 6mm allen and was forced to loosen the tensioner and drop the AC unit to get it out. But as it turns out, it's a lot easier to just leave that 6mm bolt there. YOU DO NOT HAVE TO REMOVE THE STATER COMPLELTLY, leave the 6mm allen bolt where it is, then you can avoid the mess pictured below
15) Remove the shift linkage, a 10mm bolt and a 8mm allen. The 8mm allen was a pain, you can wait until you're ready to drop the tranny to get this bolt out. (When the tranny has a bit more play)
16) Remove the RPM sensor (my car didn't have one, so I'm not really sure were it would be)
17) Disconnect the speed sensor and reverse lights, these are just electrical connectors on the driver side on the tranny
18) Take a break
19) Put slight pressure on the tranny with a jack
20) Remove the two transmission support brackets. Remove them both from the transmission and the frame and take then out. This will make dropping and reinstalling the tranny a lot easier.
21) Remove all the transmission to engine bolts you have previously broken free
22) Pull the transmission back just far enough for the input shaft to clear the fingers on the pressure plate
23) Drop the tranny just enough to gain access to the clutch slave cylinder (you'll be able to see the hydraulic lines that are connected to the cylinder, this will let you know how far you can drop the tranny)
24) Remove the 6mm allen bolt on the cylinder and pull it towards the back of the car, it'll take some doing, but it'll come out
25) Do one last check to make sure everything is clear and disconnected and then lower the transmission
26) Do a dance
27) Pose with your foot on the fresh kill holding some sort of weapon
28) Get your impact wrench out
29) Remove the six 6mm allen bolts from the pressure plate. Be careful that the clutch doesn't fall out and hit you in the face, and also be careful that the pressure plate doesn't spring off at you. It shouldn't, but just be careful
30) Remove the six 17mm bolts from the flywheel, again, be careful not to the let it fall and hit the floor
31) Replace the old throw out bearing, it just clips in so just pull the old one out and clip the new one it. This is a
sealed bearing, so no greasing is necessary
a picture of a lot of the parts removed courtesy of John Baas AKA xr4tic
1 - Passenger side trans mount and related bolts
2 - Exhaust clamp bolts
3 - Passenger side drive axle shield and related bolts
4 - Starter Bolts
5 - Engine-to-Trans bolts
6 - Turbo-to-downpipe nuts
7 - Exhaust hanger spring
8 - Driveshaft bolts
9 - Clutch slave cylinder bolt
10 - Driver side trans support-to-mount bolt
11 - Drive axle bolts
12 - Coolant tank screws
13 - Just a rag, ignore it
Installing (putting it all back together)
Nothing big here, everything just goes on the way it came off. But I do have some cautions.
1) Be very patient while putting the transmission back on
2) Any bolts that have red or blue stuff in the threads need thread lock. These are mainly the bolts on spinning parts, i.e. the driveshaft, drive axles, and flywheel.
3) Torque the flywheel and pressure plate bolts to the proper fl/lbs (44 for the flywheel and 18 for the pressure plate) and make sure you go in a star pattern, just like tightening the lugs on your wheels
4) Line the flywheel and pressure plate up correctly, they only go on one way
5) Be very patient while putting the transmission back on
6) Put the slave cylinder back while you have good access to the hole it goes in.
7) Get some people to help you guide the input shaft back into the flywheel, it's a lot easier to have a set of eyes on it from every angle, you don't want to get this far and then bend a pressure plate finger
8) Make sure you have someone watch the wires and hoses that run in the back of the engine. I almost pinched them in-between the engine and transmission while putting the tranny back on.
9) More than likely the tranny won't just "slip" right back in. You'll have to get a couple bolts started and pull the engine and transmission together with the bolts
10) Be very patient while putting the transmission back on
looks like a good write up but i would like to see you add one thing
One place this job can be really screwed up is when the trans is reinstalled.
When you reinstall the trans be very careful to reinstall the bracket attached to the wire harness. this bracket is @ the 11:00 o'clock position if you are looking at the trans pic with the torque specs on it. It is possible to get the wire harness caught between the motor and the trans. if this occurs very bad things happen beginning with, but not limited to, a fried ecu and ignition switch.
Only a total dumb *** would let this happen but it does happen, or so I'm told. a little note telling people to be aware of the wire harness and the importance of the bracket would be a good thing.
1988 Porsche 951: AKA Bad Idea
1991 Volvo 740T: AKA Solid Gold
You dont actually need to drop the starter, thur preenting you from having to drop any of the AC stuff.
Also the front drive shafts are held on by triple squares and if you plan on re-using the bolts then dont use a t-40, It might have worked for you but i have scene those stip the inside of the bolts. I replaced all of mine with 6mm allen head bolts.
I would recommend that you include R&R of the flywheel to get resurfaced with a Blanchard grinder. Most automobile machine shops are capable of doing this work. Having a clean surface will help to restore a factory smooth clutch engagement. Putting a fresh clutch disk on a flywheel that looks like that will result in clutch chatter and over time this will result in having to replace the clutch again due to premature wear on the disk material.