617.912 compression results, any input ?
 

So i did a compression test on my 1978 300d. Cold engine.
Results on psi
260
240
240
240
235

Done thru the injectors. I would like to know if this is good or bad.
Before it i did change the transmission filter, the person who did it before marked the filter. As 8/1993 lol, so it wasn't change for 21 years.... Idk how many miles the car has because it resets every 99,999 miles.....

I guess i can check the valves next. Anyone can help with their cold engine results ?

Those are on the low end of required compression. Time to begin thinking about a rebuild or engine change.

Not horrible, but not exactly great either. If valve adjustment hasn't been done on time you may see improvement from that. Depending on the results of a compression test after a valve adjustment, this engine may be anywhere from "healthy" to "run it until it won't start and rebuild/replace".

If it hasn't been used much recently I'd change the engine oil and drive it for a bit. A re-test might give you some more comforting numbers...

...but if it is working just service it and use it - don't look for trouble 'cos if you do it usually finds you!

If you go in to adjust the valves, also check the cam timing. That can also lower all the readings.

Paul M