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#1
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Oil Pressure at Oil Cooler for the 617 motor, Anyone know?
Removed my oil cooler as a result of an accident and since I have an extra oil cooler, I took it to a radiator shop to have a drain brazed in. Owner of shop seems concerned that oil cooler is "high pressure" - how high is pressure here anyway? I have been loosening my lower oil cooler hose and draining this way -even after the sump is just dripping I still get a quart or more of oil. I don't over tighten lower hose mount but since those threads are soft, I would rather just pull a drain plug as this is quicker and less taxing on the soft aluminum threads. Anyone know what pressure is in psi at the oil cooler? Can't be much I am guessing -
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#2
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should not be much pressure. it drains into the return for the bypass I think. it's going to be less than 100 psi though. I am pretty sure the oil cooler hoses are THIN, so they can't hold much pressure!
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#3
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hmmm . .. when I think about it, they are both tough and seem to be high pressure material, in fact, I had them made once and they failed so I went oem replacement with no problems.
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#4
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I just changed my hoses with OE, and the rubber is very thin and flexible. I was expecting much tougher hose. probably rated at 250psi or the metric equivalent
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#5
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thanks vstech, ok, who has the definitive answer on oil cooler psi?
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#6
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There is a drain plug on the bottom of the oil cooler on my W115, i drain the oil cooler at each oil change. Dunno if that helps you in with decision or not.
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg |
#7
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Somewhere around 100psi (90?) is the max for the oil pump, it has a relief valve that limits the pressure. Oil cooler sees the same oil pressure the rest of the engine does, when the thermostat's open.
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#8
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You probably don`t want to braze the cooler, it is aluminum, and you would want to alum weld it. Iam pretty sure the ends of the cooler are probably fairly thick to weld on. there may be an alum brazing rod, when i think braze, Iam thinking of the bronz brazing with gas.
here is a picture from the "Nipple repair thread" shows the thickness of the tank in the one picture. http://www.peachparts.com/shopforum/members/jdr01-albums-oil-cooler-nipple-rapair.html Since you are removing the lower hose to drain the cooler, probably a good idea anyway to weld on a drain. eventually the steel threads of the hose will wear on the alum threads of the cooler. The replacement oil cooler line hoses seem a lot thinner that the originals I removed a few years ago. then maybe they seemed thicker because of the age, 18 yrs of being cooked under the hood. I since replaced them with Parker Push Lock, using their blue hose. it been on there at least 6 yrs w/o any problems. Charlie
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there were three HP ratings on the OM616... 1) Not much power 2) Even less power 3) Not nearly enough power!! 240D w/auto Anyone that thinks a 240D is slow drives too fast. 80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works |
#9
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You could just put a "t" in the lower hose, & plug the extra port in the "t" as the drain.
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1983 300D 285,000 1948 willys fuel injected, tons, 39.5 PBR's 2000 PSD pumped for pulling.. |
#10
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Given the potential for massive damage in case of any failure I would avoid modifying any portion of the oil cooler and hoses.
If the MB engineers didn't think it was worth putting it in why should we? Having torn the thin aluminum of a mb oil cooler accidently when removing the lines I am wary of anything around them. Adding a drain plug seems like a fool's errand to me.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC] ..I also have a 427 Cobra replica with an aluminum chassis. |
#11
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Quote:
For the sake of draining 1/2 a pint of oil, it has no merit.
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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 |
#12
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On an OM617 the oil pressure gauge line runs from the oil filter housing to the dashboard - my gauge registers to 3 bar => 45 PSI although the needle tries to go past! As you probably know the oil cooler lines run from the same area. There is a really stiff valve in one of the connectors for the oil cooler. (If you want pictures I've got 'em if necessary). I'll try and measure force required to shift the spring - and post some area dimensions...
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#13
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Quote:
not on my cars otherwise I would not be going thru this effort - |
#14
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excellent, thanks!
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#15
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tried that and went to a hydraulic shop but we could not match up threads so I was going to take a dead hose set and adapt -
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