Question: What is Nailing? What does it sound like? (Should this be obvious? I've owned my 85 300TDT for 5 months now - first MB). Thanks.

Sounds like pounding a big nail into a concrete slab.

Sixto
91 300SE
87 300SDL
83 300SD

Maybe sounds more like someone driving a barn nail into oak -- but it is not anything you normally hear.

Very loud, sharp clack -- another "sound alike" is a large steel hammer smacking the block.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

Thanks for the description - I don't believe I've heard that one.

In my experience, Nailing is a very subtle noise. Kind of like jiggiling loose change in a glass jar while accelerating.

Injector Knock is a loud, hollow thud that sounds like someone driving a nail into a piece of wood.

..correct me if i'm wrong..

Turbodiesel:

"Nailing" is the current term for injector knock....

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!