Rattling after oil spill
#1
Junior Member
Thread Starter
Rattling after oil spill
Some idiot (me) spilled a considerable amount of oil when filling up after changing the drain plug.
Now I get a weird rattling sound which seems to come from the air conditioning pump or the power steering pump. (Under the oil fill cap).
Could this be because of the oil? Will this go away?
I also changed the idler pulley, but I am pretty sure the belt and belt tension are all ok.
the sound seems to get worse when I put the car in D or R.
Now I get a weird rattling sound which seems to come from the air conditioning pump or the power steering pump. (Under the oil fill cap).
Could this be because of the oil? Will this go away?
I also changed the idler pulley, but I am pretty sure the belt and belt tension are all ok.
the sound seems to get worse when I put the car in D or R.
#2
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Join Date: Jun 2014
Location: Melbourne, Australia
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2010 ML550 VIN WDC1641722A564750, 2010 B180
Take off the serpentine belt and start the car. If the rattling stops, you have isolated the problem to something the belt drives. Check the belt also. Its possible that oil has soaked into the a/c compressor or alternator (not sure which engine you have) and thats causing the noise. With the belt back on, does the rattling change pitch when you start the a/c? Also put some load on the alternator by switching on rear demister and high beams and see if the noise changes. Carefully use a larger screwdriver as a stethoscope and listen to all moving parts and you'll find the issue.
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juanmor40 (06-13-2023)
#3
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Location: San Jose, CA
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11 E550, 16 AMG GTS, 13 S550
is your idler pulley possibly backwards or is the shim plate that is normally there not installed?
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Alpha European Autotech
Purchase Amsoil at 25% off from me
Chris Tran, Service Manager/Owner
Amsoil Independent Dealer #7236674