SilverArrow_AMG

Hi all i've noticed the diesel clatter on my Gl320 has gotten slightly more audible. Can somebody point me in the right direction as to what could be causing this? It not noticeable at cruising speed but I can hear it at idle pretty clearly.

Racin_fool

Does it rattle badly on a cold start? Any check engine lights or extended cranking while starting?

SilverArrow_AMG

I wouldn't say it rattles badly on cold starts but the clatter is more pronounced until the engine warms. I live in a cold climate (20 degree fahrenheit lows) and I don't notice the Gl taking noticeably longer to crank than either of my 2 gas powered vehicles.

I started to notice it more after I did an oil change and started using 5w30 ESP but that was around the same time as the weather turning. Any maintenance items I should look into? Aside from the additional clatter she runs great!

alx

especially when cold they get noisier with mileage. this is normal.

high pressure fuel pump and injectors also get noisier. this too is normal.

SilverArrow_AMG

Is there anything that can be done to quiet down the engine a bit?

lepez

you might want to have the timing chain checked for stretch. om642 engines can develop that issue over time.
a M-B shop has the tools to check how much it has stretched. depending on the amount of strecht, they can either change the tensioner or the complete chain.