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Old 05-08-2003, 03:51 PM
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Join Date: Dec 2002
Location: Renfrew, Scotland
Posts: 31
Oil Changes

Im about to do oil/filter for the 1st time on a 96 W202 C250 diesel. On previous cars I always filled the filter full of fresh oil before I fitted it, to help get the oil pressure up quickly. This doesnt seem to be possible on the 605 engine (the filter sits up above the engine). What if I drained the oil cold, then when I start up,dont wait for the glow plugs to heat. This should allow a few turns of the crank before it starts, allowing more time for the oil pressure to build up. Am I being over careful, or sensible?.
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Old 05-08-2003, 03:53 PM
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Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160
Oh no........................
Here we go.
2007 C 230 Sport.
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Old 05-09-2003, 10:11 PM
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Join Date: Jan 2003
Location: USA
Posts: 699
Dear Peter:

Don't treat your car too much like a baby. Just change the oil and start your car normally. Forget about filling up the oil filter or cranking the engine a few turn before starting it.

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Old 05-10-2003, 12:49 AM
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Join Date: Mar 2003
Location: Southern California
Posts: 2,011
Change the oil with the engine at full operating temperature and just start it up. Watch the gage for pressure before you increase revs above idle. There is more than enough oil in the bearings to lubricate them at idle speed for the several seconds it might take for feed pressure to reach normal.

Here's another tip. If you have an "upside down" spin on filter removing it will cause a HUGE mess. To preclude this, puncture the top with a punch or big nail. Then open the pan drain plug and let the oil drain for at least five minutes. After you've installed the plug, you can remove the filter and almost not oil will be lost, and if you wrap a couple of shop rags around the oil filter boss, they should catch any drips.

If you have a replacable cartidige filter, fill the housing a about half full of oil before you install the new cartridge then top it off and install the lid. Even it it's up high, the oil won't drain down past the oil pump gears until the cows come home.

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