PeachParts Mercedes-Benz Forum - View Single Post - What kind of damage can occur by overheating until the motor stalls

Diesel911 · #2 01-26-2013, 02:26 AM

The Cylinder Head gets the hottest so it could get warped or cracked and/or causeing a Head Gasket issue.
Turn the Engine over at least 2 complete revolutions by Hand to see if anything is hanging up.

If it lost Oil Pressure due to overheated Oil that could effect the Timing Chain Tensioner function of being able to tension the Chain; as the 240ds don't have that Ratchet to keep the Tensioner Piston being pushed back. TheTensioner is pushed out by the Spring and the Oil Pressure.

You could simply fill it back up with Coolant and see if it starts and liste to the Engine.

A comprssion test could show a Head Gasket issue.
Pressurizing the Cylinders one at a time with compressed Air could show if there is a leak into the Coolant.

If it got hot enough long Enough the Cylinder walls can get scored up.

You can drain out the Oil and look in that for metal fragments and in the Bottom of the Oil Pan if your Engine has a removable lower pan. Depending on what the fragements are made of will tell if there is major bearing and journal damage.