I get a low mechanical noise in the engine when cold. It has 130,000mi. I have eliminated the belt driven accessories, timing chain etc. Any ideas?

L. Lipscomb

What kind of noise? Tapping, grinding, vibration?

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

If its erratic,more likely fan clutch.Grab fan blade with engine off,and see if any play in clutch.If not check bottom pully bolt.They work loose.Crazy air cleaner mounts will make you think a rod is going.Last is the flex plate between flywheel and trans.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

is it a humming?

Oil is much thicker when it is cold and the pump is stressed in much different ways upon cold start up. This noise will transfer throughout the entire timing chain area.

Clatter, when cold, is injectors and poor ignition.

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Thanks for you help. How can I determine if the source of the noise is the flex plate short of pulling the trans? The MB manual states that I will need an angle position indicator to finish off the torqueing of the flywheel bolts. I can fab a protractor for this purpose (this similar to the torqueing of the headbolts on an 88 300 (103 engine).

Lenny