I hear a grinding noise
Thread Starter
Senior Member
Joined: Nov 2004
Posts: 391
Likes: 0
From: San Jose, CA
2000 E430 Sport
I hear a grinding noise
There is a grinding noise in my engine. Its not the water pump or fan. It is comming from the front of the engine on the drivers side on the top. I pin pointed it with a screw driver and listened to it. What could this be?????
Front of the engine on top is where the cam gears and timing chains are in any MB motor. Or it could be a cam/valve thinghy. Does it go away when the engine gets warm or when you rev it?
Sorry to hijack the thread but i have a buzzing sound coming from my engine right after i start it and it goes away after i rev it to about 1k rpm. Sometimes it goes away on its own after like 1-2 seconds. This only happens when the engine is warm. Do you know what might be causing this?
Thread Starter
Senior Member
Joined: Nov 2004
Posts: 391
Likes: 0
From: San Jose, CA
2000 E430 Sport
here is the pic anyone know what this is??
This is the problem. It makes a light grinding noise and dosent go away[IMG]<a href="http://s198.photobucket.com/albums/aa152/mike430sport/?action=view¤t=Photo_031708_001.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa152/mike430sport/Photo_031708_001.jpg" border="0" alt="Photobucket"></a>[/IMG]
Last edited by mike430sport; Mar 18, 2008 at 11:30 AM. Reason: need answer
Trending Topics
Thread Starter
Senior Member
Joined: Nov 2004
Posts: 391
Likes: 0
From: San Jose, CA
2000 E430 Sport
Member
Joined: Nov 2006
Posts: 229
Likes: 0
From: Charlotte, N.C.
06 CLS500, 04 Tahoe, 04 Infiniti G35 Sedan, Boeing 737
Hey guys, thats the air injection pump. Mine makes noise too. It runs for about 60/90 seconds then cycles off when engine is cold. Then again in about 2 or 3 minutes it cycles again for about 10 seconds. Helps to pump fresh air into the exhaust ports to keep emissions down.......... 
Jeff
PS: Thats not my dog thats me....................
Jeff
PS: Thats not my dog thats me....................
Last edited by citruspilot; Mar 18, 2008 at 06:12 PM.
I don't care to show my car for several reasons.
1) There's nothing special about my car.
2) I'm sure that no one cares about each and every major and minor mod I do. Alert The Media! I got HID headlights!!! (sarcasm)

3) I'm sure that if people did want to see it, they wouldn't want to see it on the screen 3 inches tall and every time I had something to say in a thread.
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
It
should not be grinding.Wrecking yard or http://www.autohausaz.com/search/pro...20@Smog%20Pump
to fix it.
to fix it.
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,856
Likes: 7
From: Socal
07E63, 12E350, 08997TT, 16SiennaSE
Hey guys, thats the air injection pump. Mine makes noise too. It runs for about 60/90 seconds then cycles off when engine is cold. Then again in about 2 or 3 minutes it cycles again for about 10 seconds. Helps to pump fresh air into the exhaust ports to keep emissions down.......... 
Jeff
PS: Thats not my dog thats me....................
Jeff
PS: Thats not my dog thats me....................



What is the pic above??






