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#1
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So did a belt take out my engine oil supply?
Found an interesting failure mode on my "good" engine:
Apparently the belt had failed at some point, and somehow wrapped around the crank behind the balancer. It gets better... I proceed with changing out the front seal, which was leaking for some reason: The tightly wrapped strands somehow shoved the front seal into the engine. The timing chain proceeded to shred it into little bits, so around half of the metal part of the seal is missing. I hope they're in the oil pan. |
#2
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Great pics, thanks! sorry
Not sure why I logged in today to this site but yesterday I too dropped a belt. The forward most belt on my 1982 300SD. When I heard it POP I was just about to make a Left turn off the Hwy. I was able to make the Left turn but it was allot harder than I would have imagine it would of been with no power steering. These cars are bears to drive with no power steering. Sorry to see how the belt got tangled up on yours. I have not installed my new belt but I'll look to see if any strings are wrapped behind the balancer. Since my belt was the most forward one there were 3 behind it to protect it from getting to Main Pully. But I'll look anyway. Thanks for the post and good luck. Looks like you have the engine out. What model was car?? and was it the AC belt or the alternator belt(s)??
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1982 300SD |
#3
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Are there metal strands in the shredded belt? If it looks like a steel belted radial then it's most likely belt material.
But are you sure its not just the rubber from the old seal? It looks like belt material, but if remember correctly the front Cam Seals on a BMW had quite a bit of rubber in them.
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93 300 D 2.5 turbo |
#4
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I'm on expert on these engines. I don't know if your oil supply was taken out. From what I undestand the oil pump runs off a lower chain the runs to the bottom where U found the mess. Did you try to turn it over by hand? (the engine). Did you happen to see the pressure gauge, sorry dumb question. I know when ship happens you are more worried about staying in the road I sure didn't look at the dash when my belt broke. Let the experts here chime in.
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1982 300SD |
#5
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You are so unlucky !! Did you step on a China man's grave or something? Best you dont buy a lottery ticket.
On a more serious note. You should remove the bottom sump & inspect the oil pump pick up to insure it is not blocked. You dont say what motor it is. The metal in the seal is not that likely to cause a chain failure. If you can find the remains of the little spring from the seal it would be a bonus. it is the only high tensile metal in the seal.
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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 |
#6
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I wouldn't worry about the oiling system, was the engine running when you got it? If this tangled mess is old, then look no further than your cam-shaft lobes for signs of oil starvation, they'll start to "Lobe" themselves i.e. Lose there egg shape. And from what i can see in the photos, your cam lobes look just fine and dandy.
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93 300 D 2.5 turbo |
#7
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It's a 603. It runs, but there was a dull thumping sound coming from either cylinder 1 or the vacuum pump (old style). The main thing I was worried about was the bits clogging the oil pickup. The spring was still on the seal. Already got an oil pan seal and I'm about to dig into it. Should I look at the cylinder 1 bearings?
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#8
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It's always a good idea to check the journals. Just make sure you have a Newton meter torque wrench handy!
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93 300 D 2.5 turbo |
#9
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check the fsm and look up the end play specs. get a block of wood, and a large mallet, and whomp the crank one direction, set up a dial indicator, and whomp it back the other way. if it is within tolerances, at least the thrust bearing is still good.
next, I'd pull the pan and "feel" each rod cap for play. if any are OBVIOUSLY loose, pull all and inspect. for the main bearings, it's hard to tell without pulling and looking. be sure the engine is in a solid mount/engine stand, and start on one end pull the caps, and look for galling/damage do one at a time, put it back if good. torque back to specs, and do opposite side. move back and forth until each cap has been inspected, and torqued back. do the center bearing last.
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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! |
#10
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Also, plasti-gauge is a good way to check tolerances. If your not familiar with plasti-gauge its a wax stick that you put between the bearing and journal then torque to speck, then unbolt remove the smooshed wax and check width of wax against the different thickness lines that come with the plasti-gauge kit as a key of sorts. This should give you a pretty exactt idea of oil clearance between bearing/journal. Check against the maximum allowed tolerance in the shop manual. If there is a discrepancy then hopefully you'll be able to get some undersized bearings to make up difference in clearance.
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93 300 D 2.5 turbo |
#11
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So I pulled the #2 main bearing and it has a small scratch on it. Wonder what the #1 looks like...
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#12
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Pics please !!
What did you find in the oil pick up screen?
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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 |
#13
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The Blurrycam strikes again... I didn't bother with bearing pics because I knew nothing would be recognizable. The junk is in the lower right corner.
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#14
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what is that? is it metal or rubber?
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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! |
#15
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Belts on an early '80s SD certainly can take out that as well as the transmission fluid oil cooler lines and the oil cooler radiator line on an '83 300SD for example.
It happened to me out on an Oklahoma Interstate in 100* weather at mid-afternoon in July about 15 years ago. With some old truck inner tube I scrounged up behind a truckstop used as a makeshift patch held on by a small screw down clamp, a new V-belt I carry as a spare, and I was back on the road within an hour or so. The fix was so good I made the remaining 100 miles of my drive home, and could take my time going in the city to the MB dealer for a new trans. oil cooler line. |
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