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Author Topic: Noisy rear baring????  (Read 1186 times)

Offline frank mccune

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Noisy rear baring????
« on: September 22, 2015, 07:05:33 AM »
     Hello All:

     I was given a Fox .50? that was gummed badly with some type of dried oil.  I disassembled the engine and cleaned the parts as best that I could.  All went well until I installed the rear bearing.  This bearing makes a noise and has a bit of drag when it is spun in the engine.  Outside of the engine, the bearing sounds good but not perfect.

    Perhaps I did not remove all of the "varnish" from the bearing.  I boiled the bearing in dishwasher detergent, used an ultrasonic cleaner with the same strong detergent and soaked it in carb cleaner.  Can I use a solvent other than water in an ultrasonic cleaner? If so, what works well?  I have no idea as to how to clean the bearing other than soaking it in some type of aggressive solvent for a long period of time.  Perhaps I can find a replacement bearing.  What are your thoughts about running the bearing as it is?

    Suggestions?

                                                                                                                            Tia,

                                                                                                                            Frank McCune

   

 
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Offline Carl Cisneros

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Re: Noisy rear baring????
« Reply #1 on: September 22, 2015, 08:08:24 AM »
If I were you I would change out the bearing/bearings if you are planning on usung the motor.
An ounce of prevention is worth a pound of cure they say.

here is the link to Boca Bearing for the motor (Fox 50)

Carl

http://www.bocabearings.com/search.aspx?SearchType=StartModel&ProductGroupID=2&MFGSYSID=30&ModelName=50&Feature=50
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Carl R Cisneros, Dist IV
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Offline Motorman

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Re: Noisy rear baring????
« Reply #2 on: September 22, 2015, 11:16:06 AM »
Castor has some acidity and if it's been in the bearing a long time you're probably hearing the balls running over the pitting from corrosion. If it's just dried castor then Castrol Super Clean is a strong alkaline that will melt dried castor no problem.

After run while the engine's still hot, disconnect the fuel line then take 75% naptha 25% ATF squirt some in the venturi and run the prime off, do this 3 times. It will flush out the nitro and castor and leave everything coated with ATF. On my iron pistons I put one more drop of atf on the piston and work it in. Don't let castor dry out in your bearings.

MM
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Offline RandySmith

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Re: Noisy rear baring????
« Reply #3 on: September 22, 2015, 12:08:46 PM »
Quote from: frank mccune on September 22, 2015, 07:05:33 AM
     Hello All:

     I was given a Fox .50? that was gummed badly with some type of dried oil.  I disassembled the engine and cleaned the parts as best that I could.  All went well until I installed the rear bearing.  This bearing makes a noise and has a bit of drag when it is spun in the engine.  Outside of the engine, the bearing sounds good but not perfect.

    Perhaps I did not remove all of the "varnish" from the bearing.  I boiled the bearing in dishwasher detergent, used an ultrasonic cleaner with the same strong detergent and soaked it in carb cleaner.  Can I use a solvent other than water in an ultrasonic cleaner? If so, what works well?  I have no idea as to how to clean the bearing other than soaking it in some type of aggressive solvent for a long period of time.  Perhaps I can find a replacement bearing.  What are your thoughts about running the bearing as it is?

    Suggestions?

                                                                                                                            Tia,

                                                                                                                            Frank McCune

   

 

Hi Frank

just buy a new bearing, that bearing is not worth using, also stay away from powerful dish washing agents, I have seen many of them rust/corrode steel bearings, and many will tell you to never put a bearing in an ultrasonic cleaner, it damages the balls and race.
If you want to clean them, use Berry's carb cleaner in the dip can, or Green Antifreeze in a crock pot, then immediatly wash and oil the parts

Randy
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Offline frank mccune

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Re: Noisy rear baring????
« Reply #4 on: September 22, 2015, 01:48:24 PM »
    Hi All:

    Thanks for the replies.  I think Randy has the correct idea.  Now to find a bearing supply house in my area.

    What am I going to do with this engine when I get it running? Lol

                                                                                                                        Be well my friends,


                                                                                                                        Frank McCune
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Offline Fredvon4

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Re: Noisy rear baring????
« Reply #5 on: September 22, 2015, 04:58:52 PM »
  Unless you go exotic with ceramic, the BOCA bearings, (even the cheap set) are priced OK, pretty good, fit, and ship fairly fast
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