fan pulley really loose and wobbly! - Mercedes-Benz Forum

Go Back   Mercedes-Benz Forum > Mercedes-Benz Vans/Trucks/SUV/Others > W163 M-Class
New User? Register - Forgot Password

BenzWorld.org is the premier Mercedes-Benz Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 12-29-2012, 07:34 AM   #1 (permalink)
BenzWorld Member
 
Date registered: Sep 2012
Vehicle: 1999 ML430 blk on grey leather
Location: Vancity, Canada
Posts: 268
fan pulley really loose and wobbly!

I was looking down at the fan while it was idling last night and noticed the pulley was walking back and forth quite a bit. I turned off the engine and wiggled the fan and the fan and pulley rocked back and forth a lot. has anyone had this issue before? The bolts dont look loose and they stay tight against the face of the pulley which is worrisome. Can I try to tighten them upand if so how do I get to.them. There isnt much clearance there.

Thanks
ruggler is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-29-2012, 08:37 AM   #2 (permalink)
BenzWorld Elite
 
rudedude's Avatar
 
Date registered: Jul 2005
Vehicle: ML320,C230, F250, Bayliner, Mountain Bike, Fleetwood Motorhome etc...
Location: San Bernardino Ca
Posts: 1,832
You need a new water pump. Don't drive it again until it is replaced unless you want to take a chance of causing more damage like a broken radiator of overheated engine...
__________________
True success is being the master of your own time.
rudedude is offline   Reply With Quote
Old 12-29-2012, 08:45 AM   #3 (permalink)
BenzWorld Extremist
 
Merzatt's Avatar
 
Date registered: Nov 2007
Vehicle: '02 ML320
Location: Indianapolis
Posts: 1,197
There might be two reasons for fan pulley to feel loose when you grab it. You said bolts are tight. Second possibility is that the water pump bearing is getting loose. If you see a leak from the pump nipple, it is definitely time to replace the pump. Watch the engine temperatures. If it is getting too high already, replace it as soon as possible. This is NOT an emergency replacement to make you stop driving the car as long as engine temperature remains within normal limits. However, this doesn't mean you should ignore it.
Merzatt is offline   Reply With Quote
Old 12-29-2012, 09:42 AM   #4 (permalink)
BenzWorld Elite
 
Date registered: May 2006
Vehicle: 1990 190E 2.6,.... 1998 ML320, 2005 ML500SE
Location: New England
Posts: 2,683
Your description of pulley walking back and forth quite a bit would worry me quite a bit. I would be afraid of throwing the fan belt, possibly causing more damage and leaving me stranded on the side of the road. I, myself, would not drive it until I could get it fixed.
Mike
Mike's ML is offline   Reply With Quote
Old 12-29-2012, 10:27 AM   #5 (permalink)
BenzWorld Extremist
 
Merzatt's Avatar
 
Date registered: Nov 2007
Vehicle: '02 ML320
Location: Indianapolis
Posts: 1,197
Quote:
Originally Posted by Mike's ML View Post
I, myself, would not drive it until I could get it fixed.
Mike
That's your choice.

It needs to be replaced but this should not prevent you from driving the car. It takes a long for the pump bearings to go bad (10 years on mine). Fact is that we drive our cars months and years, until one day we find out about this issue, either by the help of nasty fluid on the garage floor, or engine temperature at worrisome levels.

If you are worried about belt coming off because of the pump shaft is sliding out, the shaft is attached to the blade on the back side.
Attached Thumbnails
fan pulley really loose and wobbly!-ml320_wpump_042-e.jpg  
Merzatt is offline   Reply With Quote
Old 12-29-2012, 03:21 PM   #6 (permalink)
BenzWorld Veteran
 
Date registered: Mar 2007
Vehicle: 2001 ml320 and 2006 ml350 (sold)
Location: minnesota
Posts: 711
I think it is kind of a toss up on the not driving until fixed. I used to think no big rush, but then when the ml320 waterpump with no other warnings started squealing a bit I went ahead and drove just couple days until pump was replaced. Here is the weird thing: I took off the old felt it, it was kind of gravely no surprise. I set it aside finished the job, cleaned up whatever. Then next day I examined the old one and it would not turn it was stuck.

I think it was basically seized and then starting car broke it free...It could have broken the shaft at any time soon, i would guess.
__________________
ScottB
scottbordo@hotmail.com is offline   Reply With Quote
Old 12-29-2012, 04:45 PM   #7 (permalink)
BenzWorld Extremist
 
Merzatt's Avatar
 
Date registered: Nov 2007
Vehicle: '02 ML320
Location: Indianapolis
Posts: 1,197
Quote:
Originally Posted by scottbordo@hotmail.com View Post
I think it is kind of a toss up on the not driving until fixed. I used to think no big rush, but then when the ml320 waterpump with no other warnings started squealing a bit I went ahead and drove just couple days until pump was replaced. Here is the weird thing: I took off the old felt it, it was kind of gravely no surprise. I set it aside finished the job, cleaned up whatever. Then next day I examined the old one and it would not turn it was stuck.

I think it was basically seized and then starting car broke it free...It could have broken the shaft at any time soon, i would guess.
Squealing is sign of pump getting jammed. You could not drive the car for couple more days if the pump remained jammed. Engine would sound like the pigs in the slaughterhouse. I agree that's the end of the road for that pump and needs to be replaced ASAP. My point is that, if you accidentally checked your pump pulley weeks prior to the squealing day, it would feel loose.
Merzatt is offline   Reply With Quote
Old 12-29-2012, 05:28 PM   #8 (permalink)
BenzWorld Member
 
Date registered: Sep 2012
Vehicle: 1999 ML430 blk on grey leather
Location: Vancity, Canada
Posts: 268
Thanks for all of the replies. Damn something else to fix haha. its not squealing temls are normal. There arent any leaks either. i have to figure out my p0170 code first and once i figure that out ill move on to the waterpump. Its off the road right now anyways
ruggler is offline   Reply With Quote
Old 01-09-2013, 07:30 AM   #9 (permalink)
BenzWorld Member
 
Planethill's Avatar
 
Date registered: Jun 2010
Vehicle: 2003 ML-350
Location: New York
Posts: 341
I'm going down this road as we speak. Started the truck this morning and heard quite a bit of noise. Thinking I was low on oil or something I popped the hood and saw the fan pulley (and fan) dancing ALL over the place. And not just a little shuffle, but a visibly alarming amount of boogie.

So...it's a new water pump for me, fast. And wouldn't you know, we have a large family vacation/road trip scheduled this weekend so I won't have time to try and fix it myself. So that's another $1000 at the stealership I'm sure.

Why do major problems always seem to happen at the wrong time?
__________________
---------------------------------------------------

Planethill is offline   Reply With Quote
Old 01-09-2013, 08:38 AM   #10 (permalink)
BenzWorld Member
 
Date registered: Sep 2012
Vehicle: 1999 ML430 blk on grey leather
Location: Vancity, Canada
Posts: 268
that blows man! Mine will have to wait as I have found my intake manifold is leaking giving me the p0170 code and now p0304 f*cking missfire #4 code grr
ruggler is offline   Reply With Quote
Reply

  Mercedes-Benz Forum > Mercedes-Benz Vans/Trucks/SUV/Others > W163 M-Class

Bookmarks



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 04:10 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.1

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.