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#1
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Which Diesel OIL pump fits M104 for higher flow rate?
The car is a 1995 AMG C36 with the M104 engine. It seems I need to change my oil pump, but I would rather use a more flowing one than the std M104 C280 one used in the AMG engine.
As I recall there is a diesel oil pump that fits the M104 perfectly but has a higher capacity flow rate/ pressure. Can any plz advise out of which engine that pump is, and even more so the part number on this pump so I can have it ordered. Thank you for the help.
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Jay, ----------------- -1995 Blue W202 C36 AMG (M) SOLD ;( -1995 Black W140 S500 (Lady) -1992 Black W124 E300 (Dima) (Ex-Mosselman Twin turbo Kit). -1988 Black W124 300 E 4-Matic.(Nadeen) -1983 Brown W126 500SEL.(Old Lady)(Sold) -1981 Gold W123 280CE.(Dareen)(Sold) http://www.youtube.com/user/jayrasheed |
#2
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Interested as well, especially for one that has the mid sump W140 type oil pan.
Though my 93 300SE motor did have an oil pump with a 603 part number.
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1993 190E 2.6 Sportline |
#3
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I'm doing this right now on my M104 because my oil pump decided to blow up.
The diesel oil pump and the M104 oil pumps are exactly the same. The only difference between the two are the sprocket's that drive the oil pump via the oil pump chain. Mercedes doesn't sell the stock oil pump sprocket anymore, so now, the only sprocket you can buy for the M103, M104 and OM603 are the diesel 603 part # sprockets. So, just buy the stock oil pump and sprocket and you'll have your diesel oil pump no matter what. The pumps already pump about 35psi of oil pressure at 2k rpm, what more do you need? All it takes is 3psi of pressure to get the oil from the bottom up top, the rest is volume which is plenty enough already.
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Allen Kroliczek Oak Grove Autosport | Oak Grove Autosport 01 G500, 82 300TD, quite a few more..... |
#4
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Quote:
Regards, Eric
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89 300E "Benzer1" 15.924 Uncorrected 93 400E "Benzer3" 14.200 U.C. 95 E420 "Benzer4" 92 300E "Benzer5" 16.299 U.C. Future turbo CNG 87 300D "Benzer7" 87 300D "Benzer8" 87 300D "Benzer9" 87 300D/70 AMC Javelin "Sidewinder-Benzer" 87 300TD "Benzer11" 06 E320 CDI "Benzer12" 05 E320 CDI "Benzer12A" 71 AMC Javelin AMX 401 "Sidewinder" 74 AMC Hornet 401 "C.K.10" 13.63 U.C. 74 Bricklin SV1 "Presto" AMC 360 pwrd. |
#5
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i dunno if oil pumps can come to lose pumping pressure and since the W202 doesnt have a pressure sensor i cant really say if my car runs low pressure or not, but here is what i get after a long flat out run.
What ever type of oil except for the castrol edge sport 10W60 if i do a flt out run for a few min back to back like in my vids running up the mountain highway. After such runs i get serious lifter knocking, i have even fitted an oil temp guage just to make sure am not cooking the oil, and it turns out am not and the hottest i have seen is abt 100c' when the oil is very new its harder to get the lifters to knock that is i can run flat out for longer, btw even on the coldest of days i have the same issue. So im thinking maybe its a weak oil pump that cant seem to hold its own with hot thin oil.!
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Jay, ----------------- -1995 Blue W202 C36 AMG (M) SOLD ;( -1995 Black W140 S500 (Lady) -1992 Black W124 E300 (Dima) (Ex-Mosselman Twin turbo Kit). -1988 Black W124 300 E 4-Matic.(Nadeen) -1983 Brown W126 500SEL.(Old Lady)(Sold) -1981 Gold W123 280CE.(Dareen)(Sold) http://www.youtube.com/user/jayrasheed |
#6
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Quote:
this is how the pump looks on the inside: It's all gears that are pushing the oil. I suppose a thinner oil would slide past the gears without much flow, but so much to the point that you get a lifter knock I can't imagine. It MAY be a possibility that the gears on the oil pump have worn away to let that oil slip by. Either that, or you have oil flow issues somewhere on the head. Having a higher volume/pressure oil pump isn't going to do much on these engines anyway as the oil passages are tiny. I don't know how a brand new pump is supposed to look inside, because I haven't gotten the one I ordered yet. I'll post comparison shots when I get the new pump to see how much wear the pumps go through with 160k miles on them.
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Allen Kroliczek Oak Grove Autosport | Oak Grove Autosport 01 G500, 82 300TD, quite a few more..... |
#7
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I used to get similar noises when autocrossing my '97 C36AMG, but I assumed it had something to do with the oil sloshing around in the pan and uncovering the pickup. I've never had the pan out of this car, so I can't say for certain that this was the problem. I simply stopped autocrossing it.
Best Regards, Rob
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Robert Fini '12 ML350 BlueTec, 87k '06 E320CDI, 270k '05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 69k '97 C36AMG, 313k (son's) '94 E320T, 249k '93 190E Sportline LE, 168k (daughter's) '84 190E-2.3/5spd (Stage Rally Racer) '66 230 W110 Sedan (Barn Find, Vintage Racer build in progress) |
#8
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yeah, it seems sn issue on this engine, i really dunno y it might do that, while the 3.2 M104 has none of this. any way, once i start hearing the lifters knock all i have to do is slow down for a few min and the sound is gone.
Ironic is last time i heard the sound, i had reached my destination so i parked the car and turned it off, come back some 45 min later start the car and the darn lifters are still knocking the same, drove off and in a couple of miles the sounf was gone.
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Jay, ----------------- -1995 Blue W202 C36 AMG (M) SOLD ;( -1995 Black W140 S500 (Lady) -1992 Black W124 E300 (Dima) (Ex-Mosselman Twin turbo Kit). -1988 Black W124 300 E 4-Matic.(Nadeen) -1983 Brown W126 500SEL.(Old Lady)(Sold) -1981 Gold W123 280CE.(Dareen)(Sold) http://www.youtube.com/user/jayrasheed |
#9
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Quote:
I wonder if there is cavitation in the pump? I know this is a problem in some high performance engines and as such most of them run the gerotor pump as opposed to the spur-gear type ala our M104 or stock BBC/SBC/ etc. FWIW the M102 runs a crank driven gerotor pump and I don't hear of them having issues with the 16v cars. For those of you who have pushed your motors and have the pump off. Do you see very small pitting (it would look like casting flaws almost) on the tips of the rotors? That would be tell-tale signs of bad cavitation.
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1993 190E 2.6 Sportline |
#10
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Bob, thanks and i think your theory of stiffer springs and worn check valves in the lifters can be spot on.
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Jay, ----------------- -1995 Blue W202 C36 AMG (M) SOLD ;( -1995 Black W140 S500 (Lady) -1992 Black W124 E300 (Dima) (Ex-Mosselman Twin turbo Kit). -1988 Black W124 300 E 4-Matic.(Nadeen) -1983 Brown W126 500SEL.(Old Lady)(Sold) -1981 Gold W123 280CE.(Dareen)(Sold) http://www.youtube.com/user/jayrasheed |
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