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#31
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Too slow. The smaller the drive pulley, the slower the accessory will run.
Last edited by tangofox007; 07-15-2005 at 05:36 PM. |
#32
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Quote:
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#33
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#34
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Pictures of correct pulley
Here are the pictures of the correct pulley and as you can see the v groove for the ac is larger. The keys are inside and the part #617 is stamped. The vibration damper and balancing disc are attatched in the pic. The parts yard just unbolted the assembly from the crankshaft of the parts car.
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1982 300SD Light Blue 2002 Honda Accord SE 1974 Toro Wheel Horse Tractor 2000 Toyota Tundra Pickup Last edited by willrev; 07-15-2005 at 08:29 PM. Reason: add |
#35
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Since you got "new" parts, I suppose its irrelevant, but it makes no sense to me that the bolt holes in the vibration damper were threaded. Are the holes in the replacement damper threaded or smooth? Were there washers under the bolts?
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#36
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new parts
No, there are no washers under the six bolts. This part has never been disassembled so I do not know if the holes are threaded yet. The old one was clearly threaded. I could see the threads.
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1982 300SD Light Blue 2002 Honda Accord SE 1974 Toro Wheel Horse Tractor 2000 Toyota Tundra Pickup |
#37
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yo rev,
i am going to buy a 1982 mercedes 300SD tomorrow. now we can exchange car repair tips..i'll keep everybody posted later after i get the car. good luck with your repair. |
#38
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Balancing pulley assembly
Upon looking in the FActory service manual under the balancing of the crankshaft counterweight - it shows mounting the weight in a special bench vice and drilling holes in it to balance it.
My question is this: Since the parts yard gave me the balancer still attached to the dampening plate and pulley and removed it from the parts car's crankshaft via the center bolt with the three washers - shouldn't that alread be balanced as long as I don't disassemble it? Why couldn't I just remove the one on my car from the crankshaft via the center bolt and bolt the other one on there exactly as the old one was? Because if you are balancing the counterweight off the crankshaft - then the one off the old 1982 300sd parts car should be balanced and just go right onto mine. Let me know what you think. I'm sure someone has an answer to this.
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1982 300SD Light Blue 2002 Honda Accord SE 1974 Toro Wheel Horse Tractor 2000 Toyota Tundra Pickup |
#39
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yes and no, yes it is balanced but it's balanced to the orginal crankshaft. the counter weight from your new one is not balanced with YOUR crankshaft. unless is your counter weight is damaged, you need to use your old one.
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#40
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Rev, the balancer is adjusted with the weight of the crankshaft AND the flywheel. This is why I suggested heli-coiling the existing balancer.
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'82 300SD - 361K mi - "Blue" "Good judgement comes from experience. Experience comes from bad judgement." listen, look, .........and duck. |
#41
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Heli-coiling is quite simple.
Some ppl prefer "time-inserts" which don't require a special(AKA expensive) special tap. They do require more e/d(more material for tapping). I would buy my new bolts and washers as nessary from the dealership. The EPC might even show the length and washer thicknesses as needed. A proper bolt length (aerospace) is 1-3 threads showing. No more, no less. As mentioned, you want to loctite the new bolts and torque them properly. Michael
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Michael McGuire 83 300d 01 vw A4 TDI 66 Chevy Corsa 68 GMC V6 w/oD 86 300E |
#42
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#43
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And the Dealership SAYS . . . ???
Just out of curiousity, I called my local dealership which has done many repairs faithfully and very well at a reasonable price for me. The definitive answer from the shop foreman is that the assembly that I took off of the parts car can be bolted right onto my car without re-balancing the balance disc. He said that the disc was balanced off the crankshaft at the factory and so a different already balanced disc could be put right back onto my crankshaft - no problem. Now if it was a new disc that had never been balanced before - that would have to be balanced.
I am curious - why are there so many different opinions on this repair?
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1982 300SD Light Blue 2002 Honda Accord SE 1974 Toro Wheel Horse Tractor 2000 Toyota Tundra Pickup |
#44
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Because different people believe in different things. Personally, I believe my Factory Shop Manual, which I bought new from Mercedes. It states that the balancer, crankshaft and flywheel are balanced as a set. As a Mechanical Engineer, I know that casting variations will account for variations in crankshafts, and minimizing vibrations from secondary moments is more important in a 5 cylinder than something more naturally balanced such as a 6. As a Physicist, I know that entropy is vectorless, and reasonable efforts to minimize its increase just make common sense.
The shop foreman at the dealership could be an underappreciated genius. Or he could be an idiot.
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'82 300SD - 361K mi - "Blue" "Good judgement comes from experience. Experience comes from bad judgement." listen, look, .........and duck. |
#45
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You da man Pete
Great response Pete - You da man!
I loved it! Thanks I think I know the answer. Thank God for engineers who love old cars.
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1982 300SD Light Blue 2002 Honda Accord SE 1974 Toro Wheel Horse Tractor 2000 Toyota Tundra Pickup |
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