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Old 10-03-2010, 05:15 AM   #1
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oil pump impeller? just a wild guess
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Old 10-03-2010, 06:19 AM   #2
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Quote:
Originally Posted by eightsandaces
oil pump impeller? just a wild guess
Every oil pump I have seen is made of steel. If they were made of anything else, there would be a lot of burned out engines around.
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Old 10-03-2010, 07:19 AM   #3
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Originally Posted by Spinnaker
Every oil pump I have seen is made of steel. If they were made of anything else, there would be a lot of burned out engines around.
I thought I read where someone specifically said it was a plastic impeller, I might have that mixed up with the water pump.
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Old 10-03-2010, 07:51 AM   #4
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Are you sure it's plastic? I am asking because, at least in the picture, it looks quite similar to soft metal bearing material.
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Old 10-03-2010, 07:58 AM   #5
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There are multiple potential sources for plastic in the oil; most common ones are the rub surfaces on the chain guides (usually black in color) and gasket materials (often green in color). The oil pump is all metal, so it is not from the pump. You also occasional find bits of dark plastic from the sump baffle assembly.

You appear to have bits of gasket/silicon in the oil.
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Old 10-03-2010, 10:11 AM   #6
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For peace of mind re pulling any metal out of the oil, get the magnetic sump plug from LN engineering. Once installed it is an easy way to see if there are any metal particles floating around in the lubrication system.
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Old 10-03-2010, 10:59 AM   #7
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The oil pump is absolutely all metal. The only plastic in there is on the chain ramps (though they are usually black) and maybe a seal (but I'm trying to think where you'd find green, even the factory sealant used everywhere is black). Only green I've seen in these could be an O-ring?
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Old 10-03-2010, 03:08 PM   #8
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Quote:
Originally Posted by Pinarelloman
For peace of mind re pulling any metal out of the oil, get the magnetic sump plug from LN engineering. Once installed it is an easy way to see if there are any metal particles floating around in the lubrication system.
I installed a homemade one this time around. Bought a new drain plug and milled a recess into it. Then I used JB Weld to epoxy one of those magnets that you are supposed to keep out of the reach of kids because they can swallow them. Next oil change will tell the story.
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