Quote:
Originally Posted by dtrain
89 420 sel with 195k Engine will heat up at idle (stop light and/or traffic) and typically gets to around 90+ but goes back down upon movement. I let it run in the drive and it went to 120 and I shut it down. Checked the fuse box and found the #1 fuse blown. Replaced and ran again - same thing - temp. ran to 120 and the #1 fuse was blown. AC has been running recently* - it was checked earlier this spring with regards to refrigerant and it was fine. I don't have a diagram for the fuse box and only found specific references to fuses based on circumstances in the forum. Does this relate to the auxiliary fan? I found several posts relating to checking this but am not sure that it's related. The thermostat is about 2 years old. Recently removed the radiator to replace the timing chain/ rails/etc. so the system was flushed and filled with mb coolant (50/50 mix). Any help would be appreciated.
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*Is this a mistake or what about the AC?
Does that engine have to be "Burped" via a bleed port anyone? Could have air in the system.
The viscous fan clutch could need replacing.
Thermostats can fail, too. That's what caused my recent overheat issue.
There have been some discussion about methods of testing the water pump. do a search.
I'm not too well versed in V8s but I saw no one was replying so...
Good luck
-Tom