The belt on my 1997 E300D is noisy. It's not a belt slipping noise just a higher pitched chirpping type noise. The belt is new as is the tensioner shock. Warm or cold, A/C on or off, makes no difference. The belt feels like it is tensioned normally and all the pulleys appear to be turning in line just fine (no wobbling) ..... so what could it be?

David Roseman
Long Beach, Ca

What about the pulley??? My parents van did and every time they replaced the tensioner pulley (Assuming it's the same noise as you described)

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1983 Euro 240D 277K
2016 Mazda 6
Coming Soon, 2013 Mercedes E350 Bluetec
Formers:
2012- Mazda 3
2007 Outlander- complete pile
1995 E300 Diesel 208K
2007 VW Passat 2.0T 63K SOLD
2003 Jaguar X-type 3.0 Sport Sold 04/11 w/88K
2009 Lexus RX350 9061 miles. Sold 04/09
2008 Mitsubishi Lancer GTS:Totaled Sept.,09 @ 24,000
2003 Infiniti I35 58K Sold
1984 300 turbo diesel 222K

Bearing noise?

Remove belt, start on cold engine and run for 30 secs and see if noise is present. If it is, it is internal to engine. If not present, turn off and spin each accesssory device by hand to find the offending belt driven device.

Another test is to use a hunk of 2 x 4 and floor jack and lift the engine at the oil pan 1/4" (NO more) while idling. If belt noise goes away you have a bad motor mount.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

The engine mounts are new .... about a month old. The belt and the pulleys look like they are running true at idle to me. I'll try removing the belt and running the engine to see if the noise is truely coming from one of the pulleys. It'll have to be next weekend until I can do it. I'll post what I find. Thanks for the suggestions.

David Roseman
Long Beach, Ca

I finally worked on this problem earlier today. I removed the belt and ran the engine ..... no noise ..... so the problem is with the belt and pulley system. With the belt off, I spun each pulley and they all appeared to be clean and they all turned true without any squeeking noise. I then replaced the Contitech belt with a Goodyear Gatorback belt. I have used Gatorback's on my Jeeps and they have worked well in that role. The Gatorback with its segmented ribs is susposeately designed to be quieter than standard belts. I put everything back together and it runs like a charm with no noise whatsoever. Perhaps the American Goodyear product is truely superior. Has anyone else had experience with Gatorbacks? Any thoughts on using Goodyear belts?

David Roseman
Long Beach, Ca

I had a similar situation with our Caravan - Gatorback belt cured squeaks. Also nice that the belt packaging sleeve has a belt routing diagram.

Sixto
87 300D

I love Gatorbacks. Conti's just don't hold up in my car. I get about 5 years on Gatorbacks. Even then, no cracks or separation. Just some dryness and stretch. Well worth the little extra cost.

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1981 240d
Newport,RI