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Old 07-06-2010, 12:39 AM   #11
kartmad
 
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Default Re: '05 Serpentine belt tensioner replacement

The tensioner on my Sprinter has developed a squeak. Pretty sure this happened after I gave the enginer bay a good degreasing. The squeak is very annoying and most noticable at idle, when the tensioner tends to move around a bit. As engine revs increase and the engine smooths out, the squeek disappears. With the belt removed, I have tried spraying some light oil on the join in the tensioner, but it has no effect. If the tensioner is rocked back-and-forth using 17mm spanner, I can get it to produce the same squeek I hear at idle.

Anyone fixed this sort of problem, without complete tensioner replacement?
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Old 07-15-2010, 01:15 AM   #12
Jsloane
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Default Re: '05 Serpentine belt tensioner replacement

That same idle-speed squeak had been annoying me for months, and several Continental belt replacements and one tensioner replacement didn't change it. Last week, at 99K miles, I fitted two new
upper idler pulleys and a Gates #K060888 belt. Now the squeak is gone at idle speed and only a tiny chirp remains when the transmission downshifts from 2nd to 1st with the a/c on. The pulleys changed were both the p/n 68020888AA type, both with grooves to match the belt. One of these is slightly larger than the smooth surface idler it replaced, and the larger diameter may cause the belt to run tighter against the tensioner.

Bottom line, after 500 miles, no problems and a significantly quieter idle.
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Old 10-05-2010, 09:06 PM   #13
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Default Re: '05 Serpentine belt tensioner replacement

Anybody know the torque spec. for the 2 bolts?

If I'm reading the chart right should be 60 ft lbs, but that seems way high.

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Last edited by dbeyer; 10-05-2010 at 11:18 PM.
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Old 10-06-2010, 01:14 AM   #14
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Default Re: '05 Serpentine belt tensioner replacement

Quote:
Originally Posted by dbeyer View Post
Anybody know the torque spec. for the 2 bolts?

If I'm reading the chart right should be 60 ft lbs, but that seems way high.

David
If you're talking about the two retaining the tensioner to the timing cover, the '03 service manual says 22 ft-lbs.
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Old 10-06-2010, 08:07 AM   #15
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Default Re: '05 Serpentine belt tensioner replacement

Thanks,
I guessed @ 20 ft lbs.
I could not find it in the 04 manual

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Old 10-10-2010, 02:14 AM   #16
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Default Re: '05 Serpentine belt tensioner replacement

Hi,

I see in the picture the new idler pulleys made by Meyle, Germany. Since I am familiar with Meyle from my years in Europe I new they are cheap quality parts. Try to stay away from Meyle brand on any part. I used the Meyle idler pulleys and they only lasted 5000 miles. American made are far better. Napa Autoparts has them. They are about the same price as original MB.
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Old 04-10-2012, 06:00 AM   #17
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Default Re: '05 Serpentine belt tensioner replacement

i just did this job, and did not find it hard to remove the bolt from underneath the vehicle, with the correct extension bit for the ratchet. about 3". too long and you hit the radiator fan, too short and you can't reach the bolt head. to access both of the bolts, first you definitely must insert a pin into the locking hole while holding the tensioner open with an 11/16ths box wrench (or 17mm?), or a T60 bit (easiest).. this is probably the technical crux.
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Old 06-22-2012, 10:50 PM   #18
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Default Re: '05 Serpentine belt tensioner replacement

I'm doing this tensioner and pulley job in the next couple of days.

History: We are prepping for a 3500 mile trip soon so I'm going over some things, and wanted to make sure the belt system was cool. My 99k mile 06 has been very solid, but a couple of time over the last few weeks upon a cold startup (as cold as a summertime South Florida startup can be) I had rough lumpy running for a few seconds while pulling away slow. Didn't think too much of it, a restart promptly fixed it.

But with the trip coming up I thought I'd be proactive. Searching this forum showed this might be the alternator clutch locking up, and I've started to hear alternator whine in my stereo, so out comes the 90amp and in goes a 120amp. Easy enough, (didn't fix the whine however) but now I notice the tensioner pulley wabbleing and moving the belt back and forth. I can't say that I noticed it prior to the alternator change, but I can't say I really looked either. Now it's easy to see the pulley not running straight, it looks out of round.
The van is totally drivable and I've been running around town today, taking a look at the belt at each stop. Other than the visual wobbly pulley you wouldn't know there is a problem.

So parts are ordered, and I'll do the job as soon as they arrive. If you've got some additional tips and tricks for easy installation throw them out! Thanks
Todd
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Last edited by soflo316; 06-23-2012 at 09:42 PM.
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Old 06-24-2012, 02:04 PM   #19
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Default Re: '05 Serpentine belt tensioner replacement

Might be too late, but my experience has taught me to use nothing but MB genuine parts here.
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Old 06-25-2012, 11:05 PM   #20
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Default Re: '05 Serpentine belt tensioner replacement

I went to the local MB dealership today and picked up the tensioner, along with that they gave me a grooved idler and a smooth Sheave Pulley for my 2006 2500 Sprinter. Did they give me the wrong part since most guys are receiving the grooved idlers. How do I access the bolts to remove the idlers? Thanks in advance.
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