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#1
11-26-2008, 09:15 PM
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Monark Metal Heavy-duty primer pump
What do you all make of this?
http://mercedes source.com/node/4773 Note: I do not endorse, or even like mercedes source, so don't tell me they suck.  Get rid of the spaces in the link. I guess you can't post links to other mercedes websites now 
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine 
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#2
11-26-2008, 10:03 PM
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It's the "Right" brand... (Price is Good, Too)
If my "Lift Pump" had a Primer Pump option I'd try it.
When You want the Primer ,You want it to work...AND that unit looks HD enough and we know Monark makes good Injectors...
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'84 300SD sold 124.128 Last edited by compress ignite; 12-20-2008 at 02:10 PM.
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#3
11-27-2008, 08:10 AM
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I have that pump
My car has that pump but I don't know how old it is as it was on there when I bought the car. I preferred the pump to the Bosch pump simply because of the nice large handle that was easy to grab and also that it looks way better than a plastic knob down there. Unfortunately mine is shot as it leaks when pumping and it appears that the plating on the shaft is coming off. When you screw the handle down it seals right up. Since I don't know how long it lasted it's hard to have an opinion on the durability. If the pump was rebuildable it would be the best ever.
The clearance to fit a wrench while installing or removing the pump is a bit thin and my Craftsman wrench heads were barely too thick. Fortunately the wrench from the toolkit in the trunk fit just fine.
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#4
11-27-2008, 11:01 AM
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Quote:
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#5
11-27-2008, 11:43 AM
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Quote:
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2004 Infiniti G35 3.5L 6mt Coupe 73K miles 25.6mpg ytd 2001 Green Audi TT 225 AWD Roadster 71K 6sp 30.9mpg >>STOLEN<<  1982 300D Turbo 231K 120hp? 28.1mpg YTD
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#6
11-27-2008, 02:56 PM
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Quote:
I'm suprised you can't replace some O-rings in it.
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#7
12-19-2008, 07:14 PM
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I was wrong
Replaced my leaking pump last weekend and the old one was actually a Bosch pump that looks just like the Monark pump. The Bosch part number stamped on it is 2447222099. I'm guessing it was the updated style pump before the currently available updated style pump.
I could probably put some o-rings in it but the body appears pressed together and I don't think there is a way to take it apart non-destructively.
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#8
12-19-2008, 10:52 PM
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Quote:
The top of the Aluminum tube on the older style primer pumps is rolled over inwards slightly and also acts as the stop to keep the primer plunger/handle from comming out. Besides the speculated O-ring I suspect there is a rubber compression washer with a central hole at the bottom that is supposed to seal the plunger when you tighten it down. So 2 items would have to be changed.
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84 300D, 82 Volvo 244Gl Diesel
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#9
12-19-2008, 11:42 PM
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I was going to build one of these out of my 'old' plastic primer pump; but the Bosch upgrade is pretty effective.
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment
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