Cleaning the crankshaft on a seized World Formula

Jim Simpson · Joined: 22 Nov 2004 Posts: 20

Any advice on what to use to clean the connecting rod metal off of the crankshaft of a seized World Formula motor. Any help would be appreciated.

Bernie Lacotta · Joined: 21 Mar 2006 Posts: 168

[quote="Jim Simpson"]Any advice on what to use to clean the connecting rod metal off of the crankshaft of a seized World Formula motor. Any help would be appreciated.[/quote

In a word ,"don't "! It's just about impossible to get the microscopic pieces of aluminum out of the the crank. The cranks should not be polished as they relie on a specific finish to retain lubrication. The time and money spent trying to repair the crank will easily exceed the cost of a new one.
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Robert Brooks · Posted: Fri Aug 19, 2011 9:08 pm Post subject:

I think a new crank is about $89.00
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Straightaways are for fast karts, corners are for fast drivers....

Bernie Lacotta · Joined: 21 Mar 2006 Posts: 168

Robert Brooks · Posted: Sat Aug 20, 2011 8:44 am Post subject:

not worth messing with it for $60
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Straightaways are for fast karts, corners are for fast drivers....

Chris Hatch · Joined: 02 Mar 2004 Posts: 405

Muratic acid. But it's not worth it for $60. Get the new crank.

mike clements · Posted: Thu Dec 29, 2011 1:58 pm Post subject:

I have cleaned off the "stuck on" aluminum from Briggs cranks for years with no problem. Takes about 10 mins at most. Muratic acid, then some 600 grit cloth and then some 1000 grit. Put it back together and run FHS-62R oil. Works every time.
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Began kart racing 1959. Made many friends along the way.