strange ticking behind driver
09-09-2011, 04:36 PM
#1
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clk320
strange ticking behind driver
after 100mtrs or so, there is a ticking sound that emerges somewhere behind the driver's position. It correlates to speed (so revs).
My first thought was a fuel pump, solenoid or sensor switch - but the fuel tank is on the opposite side of the car.
any ideas or how to diagnose ??
My first thought was a fuel pump, solenoid or sensor switch - but the fuel tank is on the opposite side of the car.
any ideas or how to diagnose ??
09-09-2011, 06:32 PM
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clk320
tick tock
bit embarrassing really.............came to realise that the ticking was speed dependent not rev dependent - so put the car up on ramps and checked out the rear-end.
the "ticking" was a small branch that had wrapped around the driveshaft and was hitting the tunnel guard.
Amazing how sound travels - I would have sworn it was somewhere in the rear bulkhead..............
the "ticking" was a small branch that had wrapped around the driveshaft and was hitting the tunnel guard.
Amazing how sound travels - I would have sworn it was somewhere in the rear bulkhead..............
09-09-2011, 09:35 PM
#4
MBworld Guru
My C240 had a similar problem. At low speeds, after the engine had warmed up, it would hear a similar ticking noise coming from the engine that was road-speed dependent. I could shut off the engine and coast and it would make the noise. After lots of checks and worrying that it w as a major transmission problem, I found that at the very back of the driveshaft, the plastic sound deadening material under the chassis had come detached, and when warm, would curl down and scrape the driveshaft.
