I removed the bolt but I could not remove the spring. It looks like a ball with a spring some how holding the ball? I could see the ball and spring through the holes in the bolt but not remove the spring. Am I doing some thing wrong?
Mike Michael E. Esh m...@barr.com michael...@mac.com (C) 231.894.5505 On Mar 27, 2017, at 09:45 AM, Dan--- via Mercedes <mercedes@okiebenz.com> wrote: Michael, Just follow the clear plastic return line from the filter assembly that goes to a banjo bolt on the engine side of the IP. You'll know you've found it when you see the banjo bolt that looks like it has a bolt head with a lock nut underneath it. -D Sent from my iPad On Mar 27, 2017, at 9:26 AM, Michael Esh via Mercedes <mercedes@okiebenz.com> wrote: Could someone post the email with picture of the location of this spring/nut? Or the description? I can't find the original email and I want to give it a try in 85 300D. Thanks Mike Michael E. Esh On Mar 27, 2017, at 8:53 AM, Dan--- via Mercedes <mercedes@okiebenz.com> wrote: I still haven't driven the 300D since I did the spring stretch. Once I do I'll report back. I'm sort of interested in the OM603's version of this and how it might affect that engine. There are some threads on PeachParts about low power or poor performance on the OM603 relative to this part. Dan Sent from my iPad On Mar 27, 2017, at 9:19 AM, MG via Mercedes <mercedes@okiebenz.com> wrote: That is my thought. I believe the spring may have been weak enough to lower the pressure in the pump to the point where the fuel wasn't filling the injector pistons all the way especially the last ones in line. It may also have advanced the timing some. In the injection pump on the GM 6.2 and 6.5 when the ignition is turned to start a wire that goes to the injection pump pulls the relief valve open which the manual says, if I remember correctly, drops the pressure in the injection pump to 0, retarding the injection timing by I think 4 deg. The normal pressure in there is about 10-12lbs. My thought is the same thing is happening here even though the pumps are different the principle is probably the same. In any case the more even idle and the quieter engine under power as well as the better response seem to point to that conclusion. Though I really need to do that 2mm chain stretch test to see what my chain stretch actually is. The quick and dirty method says around 4-5deg but that's not very precise. Anyway even the manual recommends stretching the spring to 27mm if the pressure is low. No I didn't check the pressure but given the age of the car I have little doubt that it wasn't where it once was when new. My next little project is to put an electric pressure gauge on the line between the final filter and the pump to keep track of the pressure while driving. This should tell me when my filter is getting to the point of needing a change. Manfred _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
