I have an interesting and most likely simple problem. Sometimes when I park with the front of my car facing uphill I seem to have trouble starting it back up after it has sat for a day. It seems to me like there must be some sort of air leak which is allowing the engine to lose its prime. This never happens to me if I park on a flat surface or facing downhill. Has anyone else had a similar problem, if so, what did you do to fix it?

Not unusual. Replace fuel lines.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

X2 or at least tighten the fuel line hose clamps.
You have a small air leak. maybe even on your secondary filter.
Did you changed anything just before this problem occurred?

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

Ive had this happen when I had Del-valve 'O' rings leak....

Also worth changing the 'O' rings on the lift-pump inlet and outlet unions...

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http://i190.photobucket.com/albums/z...0TDnoplate.jpg

Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....

I don't think I changed anything. I guess I'll just double check all the hose clamps and replace the fuel filters. I'll just make sure to get all those clamps nice and tight.

Are there o-rings on this style IP?

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

You'll have to pardon my ignorance, but what is the "Del-valve"? That's one I have not come across before.

I think changing the "O" rings on the lift pump sounds like a really good idea, I have had a couple problems in the past with the primer pump, so maybe this is where I will start.

Bingo !!!

Do you have the old style primer pump?

If you are looking around the lift pump, you are looking in the right place.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

I have one of the new style pumps. I am thinking of taking it out and replacing it with a brand new Monark old style pump. The old style pumps seem to pump a lot better in my opinion.

I didn't know someone was still making the "old" style pump.

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Brad
1981 300TD - daily driver
1963 Chevy II
2001 F-250 7.3 Power Stroke

Yep, indeed they are, just search for; "Mercedes Heavy Duty Monark Ultimate Hand Primer Pump" on Google and you should find it. I'm planning on putting mine in soon, probably when I replace the injectors later this fall.