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DIY V6 Serpentine / Drive Belt Change

40K views 31 replies 19 participants last post by  swedespeed7  
#1 ·
Just went took went through this process during the 60k mile service on a 2006 9-3 aero and thought I would pass on my experiences. I was a little intimidated by the need for a subframe chassis brace in the factory guide, but my modified version went fine.

Specialty Tools:
E14 socket, 10mm, 16mm, 18mm sockets, 10mm wrench, 1/2" swivel, breaker bar, torque wrench. (assume you already have the usual array of extensions, torx bits, rackets etc.)
Factory belt: 93-185-756

1. Jack right front, place on floor stand and remove wheel. Remove fender liner.
2. Place floor jack and block of wood under right hand side of the sump. Jack as needed to remove weight off the engine mount you are about to remove.
3. Remove airbox cover, filter and the bottom half of the air box. You should see this:
Image


4. Remove the 3 16mm hex bolts and 3 E14 bolts to remove the engine mount from both the engine and the car body. The E14 on the left of the image is hard to get to because of a coolant hose. Undo the 10mm bolt (black arrow) holding the coolant hose in place:
Image

Then rotate the hose to get the access you need.
5. Then remove the AC pipe clamp (white arrow) from the front end of the bracket on the engine:
Image

This is tricky as it is a tight space. The 10mm wrench got this done eventually. Then go to work on the 18mm bolts holding this bracket to the engine. The middle and rear bolts are straight forward. The one at the front (yellow arrow above) is difficult because of the AC piping in the way. I managed to move the pipes enough to get my regular 18mm socket and breaker bar (handle on an angle) in there. I think a 1/2" swivel would help here. After removing the bracket you should see the belt and tensioner (black arrow):
Image


6. The 1/2 square hole is just out of shot. I managed (just) to get my regular 1/2 drive craftsman breaker bar into place between the car body and tensioner. Then just a matter of relieving tension on the belt and removing it from the pulleys from both the engine bay and the wheel well. It is a little tricky getting the belt around the tensioner. Do the reverse for the new belt. Make sure new belt looks like this and is well seated on all the pulleys:
Image

Then work backwards from above.
7. Bracket to engine (18mm): 69 ft lbs, (93 Nm)
8. Reattach 10mm AC hose bolt.

9. Attach engine mount: You may need to adjust your floor jack at this point to line all the holes up.

Engine mount to engine bracket (E14): 33 ft lbs + 90 degrees (45 Nm)
Engine mount to car body (16mm): 37 ft ilbs +180 degrees (50 Nm)

Due to the space constraints I was unable to get a torque wrench on the front 18mm or rear E14 bolts so I had to guesstimate their torque. Not sure how the factory techs get around those ones.

10. Refit coolant hose 10mm bolt
11. Refit airbox, wheel well liner, wheel and put the car back on the ground.

Estimated time: 1st time and working at a leisurely pace: 2 hours.
Hope this helps someone out.
 
#3 ·
Nice write up.

The dealer time is 1-1.5 hours depending on the dealer.

And that's great you did it but the belt is rated for 100,000 mi. and should have no problem going that long. You go until 160,000 mi. now!

You didn't do the tensioner did you?
 
#4 ·
And that's great you did it but the belt is rated for 100,000 mi. and should have no problem going that long.
I agree - a great DIY. What am I missing? My 2008 OM says the belt gets changed at 160,000 miles on the V6.

P.S. I think the engineers who design these things shouild have to serve five years at hard labor doing the routine service on them. This and the plug change are both horrendous! I can't imagine what doing a clutch or a slave cylinder would be like.
 
#5 ·
My local mechanic charged me 150 total with good year belt.

my manual says to change it at 60k miles.

on the other hand, plugs were a bit difficult for my mechanic because he didn't know the car. he thought he had to take off the intake manifold. I ended up going to the dealer ship and buying the plugs. chatted with the guys behind the counter and they were nice enough to come outside and show me how to do it. just requires elbow grease. my friend and I did it in a half hour.
 
#6 · (Edited)
Great write up, I plan to do it this summer as I am nearing 60k....I am big in cheap, preventitive maintanance. I also know as I used to work for Saab that they played with the mileage requirements with many items to get them to be outside the "Included Maintance" and Warranty periods. A rubber belt is a rubber belt....which especially here in NY is not going to last longer because an accountant at Saab wants it to.... :)



Sean
 
#8 ·
A HUGE thanks to you for the DIY.

Also upset with you for making this DIY :lol:. I thought to myself looks easy enough because of this guide, but there I was stuck at that front bolt!! ;oops:

It took me 3 hrs only because of the front motor mount bolt is next to impossible to access. I had a swivel bit, it didn't help, there's just no room in there!

Well at least I won't have to worry for another 60K, thank god.

To all those who didn't change theirs at 60K, I'd highly recommend it. My belt looked good from under the car but up close the ridges were showing small signs of wear and a random crack here and there. On another vehicle at 60K I had picked up a small rock in one of the ridges and the belt was about to balloon. For me, the 60K mark is totally appropriate, it's a $40 repair not worth overlooking IMHO.
 
#14 ·
??? This is for the V6. Feeding the belt through the pulleys w/out removing the motor mount would be a giant pain in the ***** if it is even possible.

I saw this writeup and thought it seemed silly to pull motor mount bracket. I was determined to find an easier way. I couldnt.

Bracket only takes a few minutes to remove.
 
G
#16 ·
Like the "C-Minus" approach, I originally thought pulling the mount was more than necessary. It isn't. While I couldn't seem to get the mount (at least the half that bolts to the block) fully out of the way, getting it loosened and pulled partially out is fully needed to get the old belt out and the new belt in. This is b/c the mount is curved around the top belt pulley...and stiff as belts are, you can't move it past while bolted in place.

Excellent write up - very glad it was here.

Took me almost the entirety of a day to do this and install new spark plugs on my 2007 aero that now has 132k miles. Aside today's work, it's never had anything done to it except the coolant tank recall and a fuel pump replacement under powertrain warranty. Not sure which job I'd say is worse b/w the belt and plugs. They both suck. For you guys looking to do the plugs, it is possible to do the job w/o pulling the "curly Q" hose thingy in the back...and certainly w/o having to pull the intake manifold.

Best of luck to you all...
 
#18 · (Edited)
Re-visiting this thread from dead.

Anyone have an idea how to replace the belt tensioner? The middle and top left bolt i got out, the other one won't go any further due to PS pump pulley.

Just wanted to see if anyone had any ideas, should the pulley come off or can the pump be shifted an inch away from the engine(thereby giving the bolt some room to come out).

Thanks!


Never mind, need to remove turbo inlet pipe and radiator mounts, then Power steering pump has to be moved slightly.. grhh, why so damn complicated to remove the tensioner? I mean seroiusly they could not have
used an inch shorter bolt on that side?
 
#19 ·
I just did the belt and tensioner on my '08 V6. Took me 6 hours, first time doing it. What a pain. So glad it's over. Belt was easy. Tensioner is not. Serpentine belt tool set is ESSENTIAL to doing this. Makes life so much easier.
 
#20 · (Edited)
I think I found a solution to get the tensioner off.

I haven't tried it but watching a technical video on this engine it looks like a super simple solution to get to that third bolt blocked by the power steering pump pulley.

1. only loosen the top mounting bolt for the power steering pump (through the pulley)

2. completely remove the lower mounting bolt for the power steering pump (through the pulley)

Now you should be able to push the power steering pump forward enough to gain access to that third tensioner bolt so you can remove the tensioner.

edit: I guess radiator supports must be removed also to allow the movement?
 
#21 ·
Yeah those are the instructions from WIS concerning the PS pump. No need to remove, just remove lower bolt and loosen top, the move the pump like 1/2 inch out of the way so you can get the last tensioner bolt out.

Concerning the radiator mounts, this was so stupid because these bolts don't even exist in my car, they must have been phased out at some point because that radiator bracket is just welded, no bolts at all. I didn't need to mess with my radiator to get the tensioner out. Just intake tubing and PS pump stuff. They want you to remove the radiator "bolts" so you can push the radiator forward to remove some of the intake piping, but that's not necessary so don't worry about it.

Image
 
#27 ·
Thanks for taking the time and trouble to post the original writeup, and then posting the pictures again after photobucket started behaving badly.

My 06 2.8T (Aero) is having AC issues. I came here to make sure the car had a serpentine belt and not a separate AC drive belt, which is the case, and I still have water pump and power steering, so that belt isn't the problem.

The car has 120k miles on it now, and I just did a roadside repair of the 220k 2001 9-3 2.0T we put back on the road for my son, so I'm thinking its time to do this job in the garage and avoid a tow. The 2.0T motor wasn't too bad to do if you can coast to a safe place. The 2.8T, not so much.

When I do it I'll add what I can to your helpful instructions and photos. Thanks again!
 
#32 ·
Coincidentally I just replaced my alternator (has been squealing in cold weather for 5 years now, replacing it even though it still works!!) and will replace the belt at the same time because after 5 years and only 30k miles of driving, it has deep grooves and cracks here and there. Just interesting that's all.