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#16
08-08-2011, 08:11 PM
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Purpose?
Never changed mine before. So I've ordered the two seals. Can't blink at a $10 service item in all reality.
But what do they do exactly (or less than) other than seal. I've read that these help with oil pressure / flow to the rocker / cam assembly. True or false? Thanks
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 1986 300SDL 440,xxx 
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#17
08-08-2011, 09:25 PM
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They are supposed to keep oil flow to the top of the engine.
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Current: 86 300 SDL Former: 95 S500 Coupe https://fbcdn-sphotos-a.akamaihd.net..._4868414_n.jpg https://fbcdn-sphotos-a.akamaihd.net..._7054117_n.jpg
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#18
08-08-2011, 10:37 PM
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ok, contrary to EVERYTHING you will read elsewhere, there are two different sizes on the oil filter shaft.
the lower slot is 6mm ID by 10mm od 2mm wall and the Upper groove is 7mm id by 11 mm od 2mm wall. IF you use the 6/10 for both grooves, the upper ring will fail rapidly, and not seal properly as it's stretched too much. this is my story and I"m sticking to it.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#19
08-08-2011, 10:42 PM
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oh, and all they do as far as I can tell is route the bypass oil through the bypass section of the filter, and hold the oil in the can when the motor is shut off.
this will keep low oil pressure startups to a minimum, and help your oil pressure gauge give a more accurate reading.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#21
08-17-2011, 09:57 PM
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I went to the dealer today to price a waterpump for my friend's 300E. Only $520 for the part, but the reman is a steal at just $260.
 -J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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