Diesel Engine Specific Aid

82 300D has slight miss. This engine has 157,000 miles on it and runs good at highway speed. I can losen the fitting on each injector and make it run like a gas engine when you pull a plug wire. Has only slight miss when all injectors are tight. There is definitly a lose in power at low speed taking off from a light etc. The injectors have been pop tested and all are good. Compression test shows around 325 to 350 psi on all cylinders. I have adjusted the valves twice to make sure one was not to tight.

I have just pulled off my alternator for replacement and have found it to be a Valeo style. When looking for a replacement, I have found that Bosch makes a "Valeo" style and a "Bosch" style. Are these alternators interchangeable given the same plug for the wiring harness? Thanks, Justin 92 300D 135k (daily driver) 85 300D 305k (wife's car)

My 87 300TDT has began to be hard to start after it has warmed up on a warm day here in FL. Has left my wife stranded 2 times. After it cools off overnight it starts right up and runs fine. I am thinking that it is the Injection pump shut off valve- The IP was replaced by Mercedes about 2 years back and they did not replace the shut off valve. Could some one describe what happens when this valve begins to be intermittent or fail? Many thanks, David

I am looking for a listing of torque values for the W123/617 engine. I see references in various repair guides - esp. on page #83 of the Diesel Performance Tuning & Repair - to "recheck torque on each of the locking nuts..." - where can I find those Mercedes factory torque references (other than the Mercedes service manual)? Are those reprinted/listed anywhere else? Also, how truly critical is it that the value cover on the 617 engine actually be officially within factory torque specs? Any elementary guidance is greatly appreciated. thank you, Kieran-