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Coloured sludge on oil dip stick 850

posted by  james_a_sousa on  Mon Mar 1 16:29 CST 2004
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last visit: Thu Oct 23 18:51 CST 2014
[RELATED]

We have owned 4 740s, and 3 850s.

I have never seen the sludge form on one of the 740s, and have seen it on each 850 to a different degree. We check oil level every week, so I've seen a lot of dipsticks.

I think that dipstick location is one difference, the 850's is out front, and probably a lot cooler. There are many more postings of '"over-cooled" 850 engines as opposed to 740s. I also think that the 740s warm up a bit quicker than the 850s.

Even though you clean the dipstick, there is some sludge left in the tube afterward. As an experiment, I cleaned the tube one time , and it took quite some time for the sludge to return.

BTW, I ripped a rag into very narrow strips, tied it to the bottom of the dipstick, and ran it up and down the tube, I did this several times with clean rag strips until it came out clean. It was quite a chore, and not worth the effort.
--
96 855R, 95 855,854, 90 744 Ti - 340,000 Volvo miles put on 7 bricks






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