C36 AMG, C43 AMG (W202) 1995 - 2000

AMS Pulley Install

Old Jul 4, 2008 | 09:13 AM
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AMS Pulley Install

Received my AMS pulley this week, delivered quickly with no problems into the UK, looks very well made and feels light. Thanks for the quality part, I am looking forward to getting it fitted so I can tell people what its like.

Just rang MB dealership for a labour quote to get an idea of price to save me from doing it myself. They DON'T list any working times in their system, so they gave me a 3 hour quote which came from an MB workshop technician as he has done V8's in the past something about "there is not much room to work on these engines"? ............................£370 what the F%@#! but they agreed if it took longer they would not charge me extra......... great!

I did the viscous fan coupling the other month using the correct tool with no problems of space, I have not had time to look yet but there must be loads of room underneath to get to the pulley bolt with a lever bar?

Questions if anyone can help please, so I have peace of mind as always when I do the work myself:

1. Where is the tensioner/release located (is there any special tool required)?
2. There are timing marks on the new pulley, but a section is cut out inside to locate I asume, so its seems that it is straight of and straight on job?
3. Any tips if I find it difficult to remove the crank bolt, please guys no hammer hitting suggestions I know that one already..... it sometimes makes things worse.

Thanks

Last edited by £ C43 £ AMG £; Jul 4, 2008 at 09:24 AM.
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Old Jul 4, 2008 | 11:19 AM
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'98 C43 AMG. Obsidian Blk w/2 tone slvr/blk interior
dr. c36 should be able to answer these questions. i cant wait for you to install it and share the results with this forum...
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Old Jul 4, 2008 | 12:29 PM
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Hello,

That is a total load of crap. They are trying to squeeze $$ out of you. The pulley should be 1.5 hours of labor TOPS! In America it usually costs $150 USD or less and thats at the dealership. If you do it elsewhere it can be even less. It sounds like the $tealer is trying to get more $$ out of you. There is plenty of room to do the Crank pulley on the C43. The C36 crank pulley is the one that is a bit more difficult and requires slightly more labor (roughly 2.5 hours) but the C43 is literally one bolt, and the pulley just slides in & out freely with no obstruction.

I know for a fact in US its 1.5 hours and it IS listed in the book that thats a load of crap if they say its not in the book. I hate $tealers that think b/c their customers own mercedes that gives them the right to scre them out of their money. Hopefully you can resolve the situation, if not try and find a reputable mercedes independent shop.
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Old Jul 5, 2008 | 10:10 PM
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Originally Posted by Dr. C36
Hello,

That is a total load of crap. They are trying to squeeze $$ out of you. The pulley should be 1.5 hours of labor TOPS! In America it usually costs $150 USD or less and thats at the dealership. If you do it elsewhere it can be even less. It sounds like the $tealer is trying to get more $$ out of you. There is plenty of room to do the Crank pulley on the C43. The C36 crank pulley is the one that is a bit more difficult and requires slightly more labor (roughly 2.5 hours) but the C43 is literally one bolt, and the pulley just slides in & out freely with no obstruction.

I know for a fact in US its 1.5 hours and it IS listed in the book that thats a load of crap if they say its not in the book. I hate $tealers that think b/c their customers own mercedes that gives them the right to scre them out of their money. Hopefully you can resolve the situation, if not try and find a reputable mercedes independent shop.
I know things have changed it never used to be this bad, but people do pay. I felt like I was being spoken to like an idiot, the service lady I also spoke to was so polite she made it sound like they were doing me a huge favor. I know how it works........ the technician spends 1hr looking at it + another 1hr having a cup of tea and a s";t.

I am really looking forward to seeing if there is any difference. I removed the secondary cats and center silencer recently and that has made a difference, will probably get ecu done also after the pulley and maybe a sprint booster for the throttle? I want to really see what this car a capable of without super charging, which I think is a bit ridiculous for the cost in the uk...

Please tell me how to release the tensioner in the correct way, I want to do it myself as I have done everything that I could.

Last edited by £ C43 £ AMG £; Jul 5, 2008 at 10:14 PM.
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Old Jul 5, 2008 | 10:32 PM
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1996 C36 AMG
Find a shop that will do it for 1.5 hours, 3+ is rediculous. it is literally one bolt. You take a 6ft breaker bar, untorque stock bolt, then take bolt out, put new pulley in and torque down to 147 ft lbs (do NOT overtorque). very simple. Adding new serpentine does not add any significant time at all they shouldn't charge you labor for that, only parts.
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Old Jul 19, 2008 | 10:41 PM
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[QUOTE=£ C43 £ AMG £;2945986]Went to mechanic today that my friend uses, I took the AMS pulley, new bolt and crankshaft seal with me, nice guy and had taken lots of pulleys off and I also read up on how to remove all the components.

We put it on the ramp and took off the engine cover, fan, viscous, fan belt and under tray, which took 15mins.
UNFORTUNATELY for the next 2 hours we broke a couple of breaker bar socket adaptors and sweated a lot....... with no results...............................

We used a chain grip pulley clamp to stop the pulley from rotating and at one point there were two guys including myself (my weight is about 90kg) on the breaker bar and two on the pulley clamp ...........but we were slipping and felt the breaker bar flexing......we even lowered the weight of the car on the floor against the pulley clamp and tried from the top of the engine, in the end we stopped altogether due to getting worried about shearing the bolt off and having a more serious problem!!!!!!!!

He suggested heating it up with a blow torch but we agreed it was a little risky. I might take the radiators so we can get the air gun on it, but I really feel to just leave it.

Does anyone want to buy the parts off me....... I will post to anyone in the UK for £300 delivered?
I really wanted it installed on the car and give the forum feedback information ,,,,,,,,but I get put off when something simple becomes complicated

Last edited by £ C43 £ AMG £; Jul 19, 2008 at 10:45 PM.
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Old Jul 20, 2008 | 01:37 PM
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1996 C36 AMG
wow you REALLY need to find a competent shop, thats pretty sad that they can't do a simply pulley install. Take it to another authorized MB dealer they will install it in under 1.5 hours (that is the book value time).
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Old Jul 21, 2008 | 05:48 AM
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Originally Posted by Dr. C36
wow you REALLY need to find a competent shop, thats pretty sad that they can't do a simply pulley install. Take it to another authorized MB dealer they will install it in under 1.5 hours (that is the book value time).
The breaker bar was about 4 foot long and 1 1/2 inch diameter and was flexing and bending, what if the bolt tears off in my crank?

Maybe we just don't know what we were doing it so complicated, maybe we are dumb and should have been trying to undo the pulley nut clockwise instead of anti-clockwise?

If I could get the bolt off straight away it would have only taken 30mins!

Last edited by £ C43 £ AMG £; Jul 21, 2008 at 06:46 AM.
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Old Jul 21, 2008 | 11:55 AM
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a 4 ft long breaker bar damn... that sounds pretty mean lol
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Old Jul 22, 2008 | 12:16 AM
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Whomever sold you the pulley should have included some instructions. For example, if red Loctite has been used, and heat isn’t applied, a four foot breaker bar is a good way to break a bolt or strip the threads. Stripping the threads on a crank snout is a very expensive mistake. Also, the instructions should have mentioned what tool to use to lock the crank in place. I don’t know what a chain grip pulley clamp is (at least I hope I don’t know). Is that an approved method of locking a Mercedes-Benz crank in place? There may be other ways of removing the bolt, but an approved M112/M113 tool looks like this:



The prongs lock into the spokes of the pulley wheel, and the arm sits on the frame.
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Old Jul 22, 2008 | 01:01 AM
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1996 C36 AMG
Mercedes usually uses 6foot breaker bars, or 4ft with extension bar for extra leverage. Any shop that has done a crank pulley install before should have zero problems with it. The M112/M113 crank pulleys are only cranked on there to 147 ft lbs too which is hardly extreme (M104 torque rating is much higher). You can also steady the crank at the flywheel end as well but it really shouldn't be that hard unless your crank pulley bolt is somehow seezed or something (VERY rare, like less than 1% of the time). Another possibility is the previous installer of the pulley may have torqued it to 200 ft lbs instead of 200 nm (roughly 147 ft lbs) and that may be why its extra hard to take off. Its a simple 1.5 hour job in the books so should be piece of cake. Try using some penetrating oil to "loosen" it up a bit for about 15-20 min then try again.
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Old Jul 22, 2008 | 03:41 AM
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Thanks guys, your right its not that complicated, I will try not to get put off and
get this installed soon .
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Old Jul 26, 2008 | 10:47 AM
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Another trick to try with bolts that are stuck is to take a hammer and give it a few mild raps on the bolt head this will sometimes free up or break the bond between the bolt threads and threads in the crank, cases or any other threaded connection. You will not break anything or ruin the threads. But you would be surprised at how well this will work on many bolts that seem to be stuck.

Jeff
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Old Jul 26, 2008 | 05:22 PM
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Originally Posted by speedybenz
Another trick to try with bolts that are stuck is to take a hammer and give it a few mild raps on the bolt head this will sometimes free up or break the bond between the bolt threads and threads in the crank, cases or any other threaded connection. You will not break anything or ruin the threads. But you would be surprised at how well this will work on many bolts that seem to be stuck.

Jeff
Very true, This plus some "liquid wrench" penetrating oil should get the sucker loose no problem.
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Old Aug 19, 2008 | 03:03 PM
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I have had this pulley in my boot for over a month and it has made no difference in performance that I can notice so I would like to challenge anyone in my local area to race off the line. Also the two spare K&N filters and 16 spark plugs should make same sort of noticeable difference too, but why have I not noticed any change...........? pass the big fat refer next.

After reading the pulley thread that has recently been closed I thought this wouldn't sound strange as there seems to be a 50/50 mix of realistic and unrealistic people that need to come back to reality. Fortunately my car is not a priority over my life and health......Its more important I don't break down as its more difficult to fix me.

I have booked it in to have the pulley changed next weekend. Could any realistic people that have had this installed on their C43 please quote from
experience so that I can compare with mine, PLEASE I would appreciate it that people do not give their opinion if they have not 'FACT' changed to an AMS pulley on their car as this will be useless information.

Last edited by £ C43 £ AMG £; Aug 19, 2008 at 03:07 PM.
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Old Aug 19, 2008 | 03:19 PM
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Originally Posted by £ C43 £ AMG £
I have had this pulley in my boot for over a month and it has made no difference in performance that I can notice so I would like to challenge anyone in my local area to race off the line. Also the two spare K&N filters and 16 spark plugs should make same sort of noticeable difference too, but why have I not noticed any change...........? pass the big fat refer next.

After reading the pulley thread that has recently been closed I thought this wouldn't sound strange as there seems to be a 50/50 mix of realistic and unrealistic people that need to come back to reality. Fortunately my car is not a priority over my life and health......Its more important I don't break down as its more difficult to fix me.

I have booked it in to have the pulley changed next weekend. Could any realistic people that have had this installed on their C43 please quote from
experience so that I can compare with mine, PLEASE I would appreciate it that people do not give their opinion if they have not 'FACT' changed to an AMS pulley on their car as this will be useless information.
i hope you were my neighbor so we can try to race and see if it really "works." anyway, did you do a before and after dyno? i also wanted to know the numbers on paper. thanks

Last edited by svt ricco; Aug 19, 2008 at 03:22 PM.
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Old Aug 19, 2008 | 03:23 PM
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sorry mate no dyno yet
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Old Sep 14, 2008 | 03:13 AM
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any news on your pulley install? have you raced anyone yet?
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Old Sep 14, 2008 | 04:55 PM
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The C36 pulley was analyzed on another forum here: http://www.benzworld.org/forums/w202...guarantee.html. Accelerating in 1st gear with wide-open throttle, it makes about 2 HP available to the rear wheels. This gain diminishes when the car is accelerating in higher gears and disappears completely when speed is constant.
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Old Sep 14, 2008 | 10:47 PM
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Originally Posted by Dr. C36
...The M112/M113 crank pulleys are only cranked on there to 147 ft lbs too which is hardly extreme (M104 torque rating is much higher)...
You sure about that?

Specification is 200 Nm/147 ft.-lbs. plus an additional 90 degrees:

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Old Sep 17, 2008 | 02:26 AM
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I have the AMS pulley on my C55 with dyno results heres the link. This pulley is amazing.

https://mbworld.org/forums/showthrea...ght=pulley+ams
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Old Sep 17, 2008 | 04:52 AM
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Originally Posted by hooleyboy
I have the AMS pulley on my C55 with dyno results heres the link. This pulley is amazing.

https://mbworld.org/forums/showthrea...ght=pulley+ams

hey bud can you show some pictures of the engine bay, how it looks like inside with the AMS pulley
cheers.
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Old Sep 17, 2008 | 12:32 PM
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Originally Posted by kowalski
hey bud can you show some pictures of the engine bay, how it looks like inside with the AMS pulley
cheers.

I just took some pics i will post them in a few
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Old Sep 17, 2008 | 07:33 PM
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Originally Posted by svt ricco
any news on your pulley install? have you raced anyone yet?
Thanks for the interest but,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,



I am still really disapointed,,,,,,,,,,,,,,,,,,,,,,I took the car to another local mercedes specialist workshop last weekend and an ex MB tech tried to get the old pulley off, with the proper locking tool and an extended breaker bar (YES 6ft).


Unfortunately he also broke his breaker bar at the knuckle end which snapped clean off, he didn't charge me for the half hours work or his bar. He said if I still really wanted it taken off he would have to use a stronger/bigger bar which to get into the engine bay he would need to remove the radiator/fans/air con radiator etc. 4+ hrs labour and would need a re-gas and coolent and thats was if only if nothing gets broken when dismantling, like the air con rad pipes conections as he said they could be siezed/damage threads?

So I went home that day with the same feeling, but worse than the last time ...........this is one stupid and tough old bolt.........looks like I will go to the main dealer with this one but can't see them having any different tools. I hope this doesn't end up F@*%ing up my crank or having the bolt snap inside!
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Old Sep 17, 2008 | 08:01 PM
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Originally Posted by £ C43 £ AMG £
Thanks for the interest but,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,



I am still really disapointed,,,,,,,,,,,,,,,,,,,,,,I took the car to another local mercedes specialist workshop last weekend and an ex MB tech tried to get the old pulley off, with the proper locking tool and an extended breaker bar (YES 6ft).


Unfortunately he also broke his breaker bar at the knuckle end which snapped clean off, he didn't charge me for the half hours work or his bar. He said if I still really wanted it taken off he would have to use a stronger/bigger bar which to get into the engine bay he would need to remove the radiator/fans/air con radiator etc. 4+ hrs labour and would need a re-gas and coolent and thats was if only if nothing gets broken when dismantling, like the air con rad pipes conections as he said they could be siezed/damage threads?

So I went home that day with the same feeling, but worse than the last time ...........this is one stupid and tough old bolt.........looks like I will go to the main dealer with this one but can't see them having any different tools. I hope this doesn't end up F@*%ing up my crank or having the bolt snap inside!
When they took mine off they needed two people one on the flywheel and the the other on the crank along with a block of wood to get the bolt off. it wasn't easy.
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