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Old 05-17-2000, 02:59 PM
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Join Date: Jul 1999
Location: Tampa, Florida, USA
Posts: 214
I need to pull off the oil filter housing to change the oil thermostat. As far as I can tell from the service manual's description, my thermostat is stuck closed. I don't have the special thermometer that's described in the service manual, but after driving, the oil filter housing is hot to the touch while the oil cooler next to the radiator is barely warm.

With that said, do I have to drain all the oil to remove the filter housing?

On one hand, I just changed the oil barely 600 miles ago, so it seems like a waste to drain it all out and put fresh stuff in. Also, while the engine's sitting, most of the oil should drain back down into the sump pan anyway.

On the other hand, removing the filter housing is probably going to be pretty messy to begin with, and I'll be sad if I disconnect the lines that go to the oil cooler and two quarts gush out onto me. Black gold. Texas tea. Oil, that is.

Any hints? Thanks.

- Nathan
'83 240D, 250k miles

P.S. I thought I already posted this, but I don't see it on the board...

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Old 05-17-2000, 09:45 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
This thermostat will only open above like 105-110 C...Be sure to take this into account before doing all of this work.

Donnie Drummonds
1992 500E (very soon I hope
1981 280GE SWB

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