In an effort to address the remaining items on my list for the 94 S420, I started in this morning around 8:30.
First thing was to add a couple of resistors to the coolant temperature sensor for the auxiliary fans. On the 95 and earlier W140 cars, there is a sensor on the top front of the M119 engine that provides the setpoint (100 C) for the turning on of the auxiliary fans. I added two 2.2k ohm resistors in parallel to get the desired 1.1k ohm resistance to lower the setpoint to around 92C. Of course the little plastic connector body pretty much disintegrated when I attempted to disassemble it. Something for the “list ‘o’ parts” to my dealer parts guy tomorrow. Next was the fuel filter. I wasn’t looking forward to this, as I really hate working around gasoline, but…. This car has the dual fuel pump setup with the filter that uses compression and banjo bolt fittings. Fortunately, everything was neat and clean with no corrosion present. One of the clamp screws for holding the filter and pumps in place was worn out, but with a good phillips bit and an offset screwdriver I was able to get enough torque on it to break it loose. Filter and fittings all came loose without much effort. Go the caps form the new filter on the old one pretty quick, so the amount of gas that came out wasn’t bad, maybe half a cup or so. Got everything in place, tightened up and tested with no leaks. Put the cover back on and done. I did find something on the old filter that shocked me a bit when I saw it. I didn’t notice this until after I had removed it and it was draining in the pan: https://www.dropbox.com/s/x86sl4b6oab7l2g/S420%20Filter.JPG?dl=0 <https://www.dropbox.com/s/x86sl4b6oab7l2g/S420%20Filter.JPG?dl=0> And now that the garage is cleared out and car work is pretty much done for the weekend, I’m going to tear into my floor jack, I think. That’s after I start the spouse’s birthday cake baking…. Dan _______________________________________ 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