Engine Growling
08-11-2010, 10:50 AM
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2001 E 430
Engine Growling
I have a 2001 E430 (W210) and the past week my engine has a slight growl. I check oil level and I was a little low. Still above Minimum levels but low so I added a quart to see if that would help. It hasnt. It still has a growl from start to about 30 mph. after that road noise makes it hard to tell but I assume it is still there. The car has 106k miles. and still runs great, I just want to know if there is any PM work I need to do.
08-11-2010, 09:53 PM
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SL600 r230, SL600 r129,, SL500 r230, ML320, C280 Sport, 190e 2.3 16V (2)
Is the growl from the engine itself? Or maybe the belt idler bearing, belt tensioner, alternator bearing, power steering pump, AC pulley, AC when engaged?
I'm betting your idler or tensioner bearing is going to hell.
Pull the belt if you know how, and spin all the pulleys. If you have a bad one, you'll know it when you spin it by hand.
I'm betting your idler or tensioner bearing is going to hell.
Pull the belt if you know how, and spin all the pulleys. If you have a bad one, you'll know it when you spin it by hand.
12-13-2010, 03:27 PM
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11 ML350W2 / 17 GLC300
The idler pulley is easy to check and replace. Reduce the tension on the belt and remove it from the tensioner pulley, remove the belt from the idler pulley and spin the pulley. If it spins very freely with a slight whirring sound, the bearings in it are bad. I replaced the idler pulley in less than 10 minutes today. The pulley was $35 from the dealer.
