Loren, thanks for the update. Keep us posted on how the car does after the next few cold nights. I wonder if this might help Casey's warm start issue, or if that is unrelated...
=) +dm > ------------------------------ > Date: Wed, 15 Feb 2006 15:16:21 -0600 > From: Loren Faeth <[EMAIL PROTECTED]> > Subject: [MBZ] 603 IP, smoking and starting > > > Several of us over the years have encountered slow starts when cold (Below > zero or below freezing cold starts). This is accompanied by clouds of > smoke and rough running and low rpm even whit the pedal floored. In the > case of my SDL, it got worse over time, with the onset at warmer temps > each winter. > > I consulted the list and was told to disconnect or cut the purple wire to > the Glow relay to make a low budget afterglow system. > > I have been meaning to replace the o-rings on the IP delivery valves for > quite a while. > > I finally did the job and wanted to pass on the results. > > John W. Reames III <[EMAIL PROTECTED]> did a nice write-up for the 606 > engine, and most of it also applies to the 603. Marshall added a caution > to the write-up. I did it without removing the intake manifold, 603. I did > remove the air pipe form the turbo to the intake manifold. Take loose Inj > line clips at the bolts. Push the back 3 lines aside, but don't try to > remove them from the manifold with the unbolted holders still clipped to > the line. The front 3 lines come out with the clip as a unit. Since I > replaced all the plastic clips about a year ago, i didn't want to disturb > them. > > As per the write-up, I replaced the copper seals, the o-rings and the > Delivery valve springs. I did loose a couple of the old springs on > disassembly, but did not drop any of the new ones. I took out all the > valve bodies, cleaned up the IP top again , and cleaned the valve bodies > after taking off the o-rings. As a matter of habit, I keep everything in > order so it goes back in the same position. Reassembly was easy. I used > the spring to center the valve and the copper ring in the IP body, then > carefully lowered the body over it. I screwed the body in by hand. The > o-rings should seat while turning it in by hand. I then backed it out a > sisth of a turn or so and retightened them a couple of times by hand to > seat the o-rings. I repeated this for each delivery valve. > > When they were all in, then I tightened, loosened, tightened, loosened, and > then tightened to final torque. I stayed just below the torque spec. This > procedure is similar for older 4 cyl IP delivery valves. > > After getting everything back together and getting the air bled out. it > started and I had no knocks. > > THE END RESULT: The car starts instantaneously. No smoking when cold. I > am convinced I can plug the purple wire back in again. This will prolong > the GP life > > It is supposed to be getting very cold in the next few nights, So i > will see how it goes. > > If you have a 603 and smoking or rough running on low temp cold starts I'd > highly recommend changing the Delivery valve o-rings. I intend to do it on > the TD as soon as I can. > > Hope this is helpful > Plan to do trans diagnosis on the 88 TE this weekend. > > Loren > 86 SDL, 400K and running like new!
