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  1. #1
    Registered User cwroady's Avatar
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    1955 R50 Question

    New owner of a 1955 R50. I am sure I will have plenty of requests for help ... starting now :-). The oil pan has a good sized dent in the back. I thought I would attempt to heat it up and remove the dent. Doable? Part 2 of my question is which pans are interchangeable and are they available? I see deep pans in google searches, but would prefer a stock size. Appreciate input and thank you in advance.
    Chris - 2015 BMW RT / 1973 BMW R75/5 / 1955 BMW R50 - Yard Art - 1968 Hodaka / 1968 Sachs
    SCBMWRC / MOA / Airhead Beemer Club / VBMWMO

  2. #2
    Liaison 20774's Avatar
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    Looking forward to your questions. As for reshaping the oil pan, I don't see why you couldn't do that. You might create a hairline crack but that shouldn't be a problem...there are JB Weld products that you could use on the inside of the pan to cover any cracks...it's not under any real pressure and it should be able to withstand the temperature. The biggest issue would be that the mating surface of the pan is flat so it doesn't leak where it mates to the engine. Pounding out the dent could warp the pan a bit. So if the pan seals well now, it might be worth leaving for the time being.

    As for interchangeability, RealOEM has this page showing the part number and the other models it was used on:

    https://www.realoem.com/bmw/enUS/par...&q=11130007029

    So any twin cylinder bike in the '50s and '60s has the same pan. I tend to get my parts from Vech at Bench Mark Works in Mississippi:

    http://www.benchmarkworks.com/

    Give them a call to see what they have. I bought a deep oil pan for my R25/2 from him. You might want to consider adding some rare earth magnets in the pan to help capture some of the metal debris that's floating around...that helps keep it out of the slingers. Ahhh...slingers, another whole topic!!

    Have you had a chance to determine when your bike was built? I've captured information on VINs over the years and have posted that in this thread. There's also an email that you can use to send back BMW Classics to get the build date for your bike. That can be compared to what's in the lists here.

    https://forums.bmwmoa.org/showthread...nd-Build-Dates
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Registered User cwroady's Avatar
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    Excellent, thank you for the real OEM link, that will help a lot. I have only done a little 20 mile ride so far and had leaks from the pan and?? I cleaned everything up and will hopefully gets better idea where it is leaking soon. This is my first bike older than my /5. I have reasonable confidence I can replace parts on the 5, but need to gain some knowledge about parts availability for a 1955. I wasnít going to try and straighten the pan if finding a replacement would be a pipe dream. I didnít get any manuals, so ordered the Barrington book which is supposed to arrive tomorrow. That will give me a little more confidence to dig in more also.

    I have written a request for the build date info and will PM you that along with the VIN once received. I attempted to insert a few photos of the bike and the oil pan, but kept getting upload errors. Sincere thanks for the help.



    Chris
    Chris - 2015 BMW RT / 1973 BMW R75/5 / 1955 BMW R50 - Yard Art - 1968 Hodaka / 1968 Sachs
    SCBMWRC / MOA / Airhead Beemer Club / VBMWMO

  4. #4
    Liaison 20774's Avatar
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    Chris -

    The upload errors are probably due to the large size of the picture. Try reducing the size to something on the order of 1Mb or 1024x768 pixels. Windows has a paint program which lets you resample images in this way.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  5. #5
    Rally Rat 1074's Avatar
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    oil pan integrity

    The biggest thing I've noticed is that people tend to over tighten the pan bolts so that the sealing surface is warped around the bolt holes. The only gaskets that I have found are made of cork and compress easily. My cure has been to use a piece of 1/2 inch or so plate that is about an inch long. I put it in a vise and use a hammer to flatten out the lip on the pan where the bolt holes are found. It doesn't take a lot of torque to tighten these bolts, so I use a sealant (let's not get onto that thread) and blue Loc-Tite on the bolts to get the pan situated so that it doesn't leak.
    Boxerbruce

  6. #6

    My '55, Lets see yours

    I wouldn't even try to straighten out the oil pan unless it was a minor dent. You can find one easy enough on fleabay or maybe even Vech has a used one collecting dust. I found the best thing for a leak free seal on the oil pan is to first make sure you flatten out the mating surface (where the gasket goes) and then give the new cork (only use the cork) gasket a good coating of bearing grease, both sides and edges. The bolts should be cleaned thoroughly and apply a little bit of grey Permatex gasket sealer to the threads.

    I've tried the gasket sealer on the oil pan gasket with no success and a headache to clean up.
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