Crankshaft bung plugs

[pistonbroke]

Hi Guys, I'm ready to have my rotating assembly for my 255 balanced. When I had the crankshaft turned they pulled the plugs out to clean the oil passages. Now, do I want them in for the balancing or wait until its done so any metal particles can be cleaned out. Thinking about how much they weigh one would think you would want them in when balancing the shaft but I don't metal particulate in my bearings either. Thanks for the help, Tim

[CA Victoria]

Dorman plugs or Ford crank:
https://www.fordbarn.com/forum/showt...t=Dorman+plugs

[34fivewindow]

The Dorman # for the 5/8 Mercury plugs is 555-010

[Kube]

Originally Posted by pistonbroke

Hi Guys, I'm ready to have my rotating assembly for my 255 balanced. When I had the crankshaft turned they pulled the plugs out to clean the oil passages. Now, do I want them in for the balancing or wait until its done so any metal particles can be cleaned out. Thinking about how much they weigh one would think you would want them in when balancing the shaft but I don't metal particulate in my bearings either. Thanks for the help, Tim

The crankshaft should be thoroughly cleansed prior to balancing. The plugs should be installed prior to balancing as well.

[enginepieces]

The plugs should be in when balancing. Take the plugs and weigh them that is the amount that the balance will be off if left out.

[JWL]

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Weigh the plugs and add equal weight pieces of clay in their place. Do not install the plugs until the final pristine cleaning operation is performed just before engine assembly.

[Pete]

When balancing there should be NO plugs in the crank. NO cam drive gear or key also.
Use clay as JWL said.
The bob weights should all be within a quarter gram of each other.