Yes, we used a laser temp sensor. It showed there were no problems with the actual temp of the engine, just the gauge. BillR
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Landenberger Sent: Tuesday, April 22, 2008 1:20 AM To: Mercedes Discussion List Subject: Re: [MBZ] Two questions, at least - 1981 300SD injector pump and temp fluctua... Bill, I had a temp problem on my 500E...... Do you have a laser Thermometer...?? I merely had a problem with the connection at the gauge. It was loose. Tightened! No more temp problem....... Check the coolant lines and engine with a laser thermometer... Even cheap ones work pretty good. Hope this helps.. Take care, Chuck Phoenix AZ On Apr 21, 2008, at 6:52 PM, [EMAIL PROTECTED] wrote: > > In a message dated 4/21/2008 3:50:14 P.M. US Mountain Standard Time, > [EMAIL PROTECTED] writes: > > 1. The temp gauge usually holds at 100 or a degree or two above or > below. It has started to register hot for a time every few miles, > starting > in the last few months. I have had the thermostat replaced, > radiator > flushed and the temp sensor replaced [old one was a bit corroded], > and this > morning when it jumped up to 120 I headed back to the shop and a > temperature > sensor showed nothing on the engine or cooling system over 180 > while the > gauge was at 119. Sometimes it jumps [like an air bubble] and > sometimes it > climbs and goes back down slowly. Tomorrow the cluster will be > pulled and > the resistance on the wire checked, as well as the vacuum lines. > Any other > thoughts ? > > > > Bill, > > Probably a corroded connection. Start by unplugging the connector > at the > driver's side of the cylinder head, and watch the gauge. There are > two senders > in the 2-3 cylinder area of the head i believe. Push the > connector on and > off a few times and see if the temperature reading becomes more > accurate. > > A little known connection on the back of the glow plug relay is > next. The > wiring harness for the temperature sender is the same one that > contains the > wiring for the glow plugs. So the glow plug relay becomes a > connection point > for your sender. Same drill--unplug it and replug it a few times > to remove > the tarnish on the contacts that Mercedes silver is famous for. > Do not sand > the contacts! > > If these two points have not fixed the problem, NOW you can pay > someone to > remove the instrument cluster, which also has a circular push on > connector on > the back. > > I bet it is the one on the GP relay, since you recently changed > the sensor. > You changed the correct sensor--right? > > Good luck, > > Jim Friesen > Phoenix AZ > 79 300SD, 264 K miles > 98 ML 320, 155 K miles > > > > > **************Need a new ride? Check out the largest site for U.S. > used car > listings at AOL Autos. > (http://autos.aol.com/used?NCID=aolcmp00300000002851) > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
