SL/R129: Knocking engine....
Thread Starter
Super Member
Joined: Mar 2009
Posts: 899
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From: Deleted
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Knocking engine....
Well, after drag racing my SL for a total of 9 runs (she did well running in the high fifteens) my engine in now making a knocking sound... I don't have any more info at the moment but I'll be back in a bit to post when I know more... I'm hoping with an oil change it will magically go away but something tells me that's not happening any time soon.... 
Former Vendor of MBWorld
Joined: Sep 2008
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AMG
Your primaries or secondary cats may be shot. They may have finally given up after all that back to back stress of 9 full passes. They make a TERRIBLE rattling sound that sounds like there is marbles in the engine. Get under neath the car and push the gas pedal with your hand, see if you can hear the rattling coming from the primaries or secondaries. If so, then consider yourself lucky: time for high flow cats 
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MBWorld Fanatic!
Joined: Aug 2004
Posts: 1,608
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From: West Coast, USA
2 SL with every Brabus mods available & Class A competition sound system
it knocking or ticking....?? it could be your cam oil feed tube that cause the problem.....
read here...
http://www.benzworld.org/forums/r129...e-ticking.html
read here...
http://www.benzworld.org/forums/r129...e-ticking.html
Junior Member
Joined: Feb 2009
Posts: 19
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From: Raleigh, NC
95 SL500 Panoramic, K&N, Custom Intake/TB, RENNtech RB, AMG Monoblock
