[toddlnrd]

This may be a dumb question, but I have to ask it anyway.

I have installed a new thermostat on my 85 300d and did not pay attention to the direction the new tstat went into the housing. I installed it the way I assumed it went (spring side away from the engine block). My temps get up to 100 - 115 Celsius. With old tstat my temps max'd out at 65 - 70 C. Did I install correctly?

This my first Mercedes and I love the vehicle, just don't know much about it yet!!

 

[123 Benz]

Thermostat Replacement and modification

 

[DZL_Damon]

yup, you got 'er backwards

 

[mountainredneck]

i saw the link posted for diesel giant. we used to drill a 1/8 hole in t stats just in case. i would not drill as many holes as he did personally. maybe 1 .250 hole thats it.

 

[Zedd]

A correctly operating cooling system does not need any holes drilled in the t-stat.

 

[mountainredneck]

it never hurts to have a little insurance. that insurance is a .125 hole in the rim of the t-stat. it could save your engine or at least get you home in case of t-stat failure. you would never know its been done unless your t-stat sticks. when that happens, your temp would go up some, but not redline. you would know something is wrong, but you would make it home.

 

[toddlnrd]

thermostat

Thank you for all your input. I will switch it around maybe tonight and take it for a spin. I am sure it will be better when I install it correctly.