jayh

was told in another thread that 6PK2310 belt can bypass the ac ..does anyone have a diagram how the belt is ran? is this possible to do? any damage i would do to the car by driving it like this if i can get it on? any diy articles would be awesome...appreciatte any input..thanks

Gullwing

There is a picture in the owners manual that shows how the belt goes on with the A/C. I would just use this picture and install the new belt around everything except the A/C. Just make sure the belt does not rub on anything. As long as the belt is installed around each pulley correctly and does not rub on anything you will be fine.

mleskovar

I think that's a good workaround for a frozen AC pump. As mentioned, use a piece of string first to make sure it would clear and to determine the needed belt size. Don't forget the adjustment range of the idler pulley.

jayh

thank guys im gonna give this a go tomorrow..i am hoping for the best!!! if i cant fix this its either gonna be sold or to the repo man unfortunately...just lost my job 3 months ago so being broke and without transportation now im gonna be living on the streets soon...lolololol

vettdvr

If the compressor froze up you can disconnect the power to it and the pulley will still turn because the clutch isn't engaged. However if the pulley froze up the compressor might be still good. The bearing in the clutch in most cases can be changed out without changing the compressor. Your post didn't say if the pulley would turn without power to the compressor.

mleskovar

No clutch with the latest MB AC compressors. That's why you don't get the annoying "click" and rpm drop when it's operating.

vettdvr

Interesting what year did this start?

mleskovar

I don't know....I found out the same way you did

jayh

the car is working again!!! thanks everyone!!! i was about to have a ****ing heart attack...was ready to sell my 2 plasmas and my couch to afford the fix..lol would of been sitting in empty apartment with just a bed..lol

vettdvr

I pulled the manual and dang if your' not right. There is no clutch and the compressor turns all the time. It looks like a clutch but when I looked at the functional description and cross sectional view. THERE IS NO CLUTCH.

There must be oil flow all the time for the compressor and internally this is designed in. SO hopefully I will never need to change one.

jayh, did you bypass the compressor of have it repaired.

Gullwing

Depends on the model. They dropped the clutch and went with a wobble plate design.

Working again? Did it fix itself or did you fix it?

jayh

i bypassed the compressor with the shorter belt!! let it run 15 min or so and everything seemed fine! no ac but i can have transportation so im good to go for now!

mleskovar

My understanding is there are vanes inside the pump that are varied to increase/decrease compressor pressure.

Ausmbtech

The 6PK2310 belt can be used on any non kompressor M112, M113, M272 and M273 to bypass the A/C.

I've had this belt in my toolbox for the last 4 years to diagnose noisy A/C compressors and P/S pumps. Because they sit so close together it's hard to tell which makes the noise. By eliminating the A/C if the noise remains then it's the P/S or if it goes it's the A/C.

Amazing how many misdiagnosed compressors and pumps I've seen replaced because tech's don't believe a $20 drivebelt can be used as a tool.

Gullwing

Screwdriver also works.

Never used that belt, not sure how many techs in the US would even have one.

Ausmbtech

Yeah you can try a screwdriver, but noises CAN be transmited between the power steering and the A/C very easily especially when the A/C compressors no longer have clutchs, you can't turn it off.

I Probably use the belt once every 2-3 weeks.

We had a problem a few years ago with the RHD CLK's with M272 engines getting a noise through the steering only when hot (ambient).

The end cause was vibrations in the drivebelt only when the A/C load was above 70-80% at approx 1500rpm which caused a pressure fluctuation in the P/S high pressure hose that was transmitted to the steering wheel.

Replaced the power steering hose with a new longer hose to dampen the pressure spikes. No more problems. Alot of noises in these cars aren't as straight forward to diagnose anymore.

vettdvr

Is there a belt for the w211 V8?

loubapache

I think Ausmbtech did say this belt works for non-kompressor M113 and M273 engines.

vettdvr

Ok, thanks I guess the W211 does have the M113.

I looked at the belt routing and it looks like on the M113 you have to remove the compressor to make the belt fit. Is this correct?

loubapache

I do not have a M113 but the belt and all these pulleys look identical to those on M112. So you should be able to by-pass it by not putting the belt on the AC compressor.

jayh just did it so he should have the definitive answer.

vettdvr

Your drawing matches mine. But looking at pulley 2,3,4 if you go from 2 - 4 bypass 3 it looks like 3 will be in the belt path. This is why I asked the question. But then perhaps the drawing is not scale.

loubapache

Not to scale.

vettdvr

Well now as DAGWOOD in the comic strip would say, "now that makes sense if you don't think about it!"

mleskovar

Wow.....how long did it take to figure that one out?

moosh611

This thread is a life saver. The C240 has been in the shop after the Compressor died on me. the repair guy said there was no way to bypass the compressor with a shorter belt. Now I can just order the belt! Thanks guys!