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Sportster Motorcycle - Bottom End Cams, Cases, Gears, Flywheel, Piston Conecting Rods, Oil Pump, etc...

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ampco-45, cam bearings

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  #1  
Old 8th June 2019
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Default 2016 Roadster w/ 4 spun cam bearings

Holes are hogged out .943-.944, with cleanup I need to get some bearings made. Is AMPCO-45 a suitable material for sportster cam bearings? Thanks for the help.
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Old 8th June 2019
Jollly Rogers Jollly Rogers is offline
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What was the root cause of the failure? Whenever cam bushings get pooched the cause was something else like contamination in the crankcase or poor oil flow. Cleaning and flushing everything is critical before reassembly after repair.
Joe
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  #3  
Old 8th June 2019
NGOT8R NGOT8R is offline
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I am curious to know what the root cause of the problem is as well. How many miles are on the motor?
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Old 8th June 2019
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Not sure anybody ever identified the cause of this.
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  #5  
Old 8th June 2019
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Oil breakdown with high levels of solid (carbon) particulate. My pistons were unrecognizable due to the blow by making a u-turn and going right down to the combustion chamber.
The bike has 30K on it.
The first symptom was lifter noise. Particularly the front exhaust. You'd swear it was coming from the rocker boxes. So you take 'em off; and... Nothing they' re fine. So I guess it's a lifter leaking down. So I gets some S&S lifters, pull the cam cover and there it is: all four bushings welded to the cam.
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