If you have rust at the water pump weep hole, coolant is escaping there (and air is possibly entering there). Change the pump.
Symptoms of a bad fan clutch are overheating when not moving over ~35 mph (in traffic) and cooling down when you get the vehicle moving over ~35 mph. Continue flushing until the exiting coolant is no longer rusty. Otherwise, the rust will form a mild abrasive destroying pump seals, etc. Tom Potter -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, April 04, 2006 6:51 AM To: [EMAIL PROTECTED] Subject: [MBZ] 82 300D-T running hot after acid flush Hello All, I recently did an acid flush and the car was running fine until a few days after the flush. The car now is running hotter than *before* the flush. By that I mean getting to up over 100, which it has never done before on such short trips. Prior to this if I would drive it very hard for a while it would get to near this temp then shortly go back to 90. I am thinking that perhaps the flush dissolved or dislodged a bunch of stuff that now has somehow disabled my water pump ? The water pump is rusty at the base, not far from the weep hole, that seems unusual since the rest of the engine seems to have a nice layer of oil on it. I have been reading that one way to test for a bad water pump is to hold the top radiator hose when the engine is warm and when you release it you should feel water rushing through. I tried that but am not sure I can feel this. The other indicator is to look at the weep hole to check for water, I did not do this yet. The water from the flush was very rusty, but it has been rusty every time I have changed the coolant. A few months ago I put in a new thermostat which helped the car run cooler. I have also read that overheating can come from a bad fan clutch, not sure what that is or how to test for that. I understand that I might also have a bad radiator but I understand that one way to tell if you have a bad radiator is how fast it drains, mine drains extremely fast, just pours out. Any insight would be appreciated. Dan Elliott 82 300D-T 93kmi ________________________________________________________________________ Check Out the new free AIM(R) Mail -- 2 GB of storage and industry-leading spam and email virus protection. _______________________________________ http://www.striplin.net 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://striplin.net/mailman/listinfo/mercedes_striplin.net
