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#1
05-20-2006, 12:21 AM
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fuel line path in 60's diesel finner?
I am now starting to re-energize my finner after it has sat for long periods of time over the past three years. As an extra precaution, I want to plumb in an extra, clear, in-line fuel filter onto the line coming direct from the fuel tank so that I can watch what's coming out of there since it has sat for so long.
I am just getting to know the engine, so I am a little unsure about the path the fuel takes to get into the injector pump system. Can someone fill me in on where I can place this filter? There are two metal lines on the right-hand fenderl, one above the other. One is probably the return line. I am thinking that the one line that travels straight into a little "canister" looking filter-body with a wing-nut top is the one coming from the fuel tank. Can anybody help me out here? Thanks.
__________________
+ + + + + + + + + + + + + + + + + - Theo - Fins make 'em fast! (looking..) - '65 190-Dc + + + + + + + + + + + + + + + + + 
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#2
05-20-2006, 01:24 AM
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Sounds like an excellent idea. I cannot tell without looking at pics, but what you want for coolness factor is the retro-upgrade glass jar wingnut-held small internal cannister filter used on both gasoline and diesel ponton cars and some early fintails. I think the filter element on these is fine wire mesh thats cleanable and reusable.
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#3
05-20-2006, 01:28 PM
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Yah, my classic style canister element is gone
Yes, I'm pretty sure that my old-style canister element is gone. Eventually I intend to find a new one to put in there.
I want to be able to quickly visually watch what's coming out of the tank though for a while when my head is hovering in the engine compartment as I'm fiddling and watching things. That's why I want to plumb in one of those in-line clear jobbers for a while. From my limited experience and knowledge of diesels so far, I know that the injectors and pump are the most valuable heart of the old beast and so I want to protect that system as best as possible. Do you happen to know the inside diameter hosing that is common to those fuel delivery systems is?
__________________
+ + + + + + + + + + + + + + + + + - Theo - Fins make 'em fast! (looking..) - '65 190-Dc + + + + + + + + + + + + + + + + +
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#4
05-20-2006, 05:53 PM
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1\4 or even 3/8" will fit or ask for the primary filter that fits a 1979 240D, its a $2 item that everybody carries. Then cut the hose when you find it and splice the filter into the system with hose clamps if nec. The once a year replacement large cannister filter is known as the secondary. Meanwhile immediately order a couple of secondary filters online. Gotta have decent fuel filters for the diesel, probly the most important single maintenance item. Primaries typically last 3-6 months, the secondary filter should be good for a year. Trust me, you dont want get lazy with changing the filters or your injectors and pump will go south plus the car will slow to a crawl.
(edit: Near as i recollect MB didnt produce the really cool glass bowl primary cannister in '65 - too many ham handed mechanics kept busting the glass, torquing the wingnut too tight.... '63 is probly the last year they had it. It dissapeared about the same time hollow camshafts with oil jets in the lobes vanished from production. Last edited by 300SDog; 05-20-2006 at 08:21 PM.
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#5
05-20-2006, 06:10 PM
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secondary filter costs?
How much should a secondary filter run me in $$? Are they a finer filtration rating than the primary?
Do I just unbolt the top and pull out the canister, or is more involved? I'm a bit intimidated about messing with all the plumbing lines and there seems to be some things running into the top of it. I live really close to a big mercedes shop which has a great walk-in parts counter, so I should be able to just walk over and buy a secondary. Thanks for that tip. It hadn't occured to me to change that one out also.
__________________
+ + + + + + + + + + + + + + + + + - Theo - Fins make 'em fast! (looking..) - '65 190-Dc + + + + + + + + + + + + + + + + +
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#6
05-20-2006, 07:23 PM
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The secondary filter is messy to change, park the car on the lawn. Unscrew the bolt in the center of the canister and the canister comes apart. The old filters were made of felt like material and the secondary is the finest filter.
There are actually 3 filters: the pick-up screen in the tank, the "primary" and the secondary. If I was doing this, I'd drain the fuel tank, and remove the pick-up screen from the tank to make sure that it was clean. Since the car sat for 3 years change the oil and filter too.
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Over 21 years I owned several: w108 w110 w111 w115 w116 w123 w124 w126 w212
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#7
05-21-2006, 01:27 AM
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Quote:
 ) and most likely they'll have your filter. I'd expect it to run about $20-$25. I want a diesel finny 
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'84 190d 2.2 - Silver Converted to 5-Speed '84 190d 2.2 - Blue Factory 5-Speed '76 300D (W115) Sold, found again in less auspicious circumstances
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