My issue is what I think is tensioner noise. I have replaced the spring with new and the shock off a known good car, but it is still there. While, I know I should replace the tensioner as the last item in that are, wondering about the alternator pulley as well.

This item is referenced in another thread, but it got me wondering if mine is going or gone bad. INA makes these, as does Gates, but Im not sure how to test it to see if its bad. Also, has any one changed these on a 98-99 E300?

__________________
Treetops
06 E320 CDI 127K Miles
87 300TD 231K Miles

99 E300 269K Miles-Sold

As far as tensioner/spring noise is concerned, the one on my car buzzes when the alternator is under load, especially right after starting.

I know it's the shock mount because I can press my finger on it and it gets quiet.

Not sure if this is applicable to your situation but the knowledge may be of some use.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

The pulley for the 99 606 is the pulley I bought for my 95 to replace the solid pulley.

The gates part is Gates 37011P, you'll also need a H22X33T splined tool to remove and install the pulley.

When I did the pulley on the 95 it was easiest to remove the alternator, I had to use an impact to remove the old solid pulley, and then install the new pulley with the tool.

If you're comfortable removing the alternator, removing and fitting the new pulley is much easier than that.

__________________
1982 300D (w123, "Grey Car")
1982 300D (w123, "Blue Car")
2001 Ford F150 "Clifford" (The Big Red Truck)
1997 Dodge Ram 2500 12V Cummins
1996 Dodge Ram 2500 12V Cummins
Previous Vehicles:
1995 E300D, 1980 300SD, 1992 Buick Century, 2005 Saturn Ion