Thermostat change 1985 300 sd
 

just wondered if there was anything I should know before changing the thermostat. Thanks all

zbenz,

my car is a '85 300CD but I believe the engines are essentially the same.

nothing problematic to doing this. make sure the thermostat faces the right way. be careful to get gasket in correctly.

different thermostats apparently can result in different operating tempatures. I read that some people change them more than once using different brands because they don't like the tempature. I bought mine from fastlane (here) and have no complaints.

Also, every time I mess with my radiator the car's tempature acts weird for a while when I restart. Must be air in the line (at the thermostat?). Can get pretty hot before settling down. I don't know how to prevent this. Just keep an eye on it at first.

Nic

Thanks
 

Thank you both. I did it this afternoon. As I thought it had broken and was stuck open. better than shut. I thought one of the bolts wasn't comming out, but a little prayer and out it came. I didn't replace the bolts but I did chase the threads with tap and die. No problems with the temp. Thanks again

any ideas on getting a seized one OUT BEFORE it snaps off? ive got one that even using a six sided socket the exact size it still stripped out on me before turning. I guess my only option left is to get a good, new pair of vice grips, heat the eninge, up, spray a can of WD-40 on it and pray right?
Ryan

my SD temp gauge went way up after thermostat change,I tried another thermostat ,same thing then someone posted a link to a site that shows where on thermostat to drill a small hole I did and it worked like a charm try search I think I will also just out of curiousity.......
William Rogers........

Thermostat Bolts
 

Anyone have the part number for the housing bolts? I have a 300d 1983. Thanks Much

There are a lot of spray and liquid like Liquid Wrench and PB Blaster, etc ... they do seem to work - give them an hour or two ... WD 40 just makes things shiny.

right George W D stands for water displacing witch it dose quiet well,good for a wet coil ect.......
william Rogers......