When I did my last oil change and pulled of the oil filter housing cap, I notice that the pin size hole on the shaft was clogged. I tried blowing through the bottom but no oil (or air) would come through the hole near the top.

Do I need to get a replacement cap or is something I don't need to be worried about?

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)

Scott98,

The stem has a one way check valve in it and will not flow in the direction you tried to force air. You have to try the other way.

Unless you have done something unusual, I have yet to find one of these clogged. They get oil flow from the bypass filter which is much cleaner than the oil going through the main flow area.

So, try getting air or oil to flow in the hole in the side of the stem and out the bottom to see if the passage is, indeed, clogged. Good luck, Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

I wonder if there is something wrong with the check valve because in the past, I would blow through the bottom and see oil coming out of the side hole at the top?

Scott

__________________
Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)

Ok now I'm confused, you should not be able to blow air through the bottom hole? During my last oil change I used the air compressor to shoot air into the bottom hole, I shot myself with oil from the top hole.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

I wish I had an air compressor. I use the low tech method of blowing through it with my mouth.

Scott

__________________
Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)

I just have a little cheap one from Home Depo. But it is the best most usefull tool I have, I would not be without one now. I can run impact guns, air grinders ect. Not to mention inflating tires is about as simple as it gets.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200