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Old May 4, 2025 | 02:19 AM
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Default oil route

Hello,

My bike is an '87 Softail, and I want to build a custom oil tank.
My concers is that, even I clean the new tank as best I can, there may be some metal filings or dirt left in the new tank (due to welding, grinding...).
What are the chances of these metal filings or dirt getting into the engine? as the oil filter is placed on the return line.
From the tank, the oil first passes through the tappet oil screen, then goes to the engine?

Thanks
Marcel
 

Last edited by marcelm; May 4, 2025 at 02:20 AM.
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Old May 4, 2025 | 07:01 AM
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Originally Posted by marcelm
Hello,

My bike is an '87 Softail, and I want to build a custom oil tank.
My concers is that, even I clean the new tank as best I can, there may be some metal filings or dirt left in the new tank (due to welding, grinding...).
What are the chances of these metal filings or dirt getting into the engine? as the oil filter is placed on the return line.
From the tank, the oil first passes through the tappet oil screen, then goes to the engine?

Thanks
Marcel
Better cleaning job!!!
 
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Old May 4, 2025 | 11:50 AM
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You can check with places like Dennis Kirk, or J&P Cycle, they carry re usable in line oil filters that could be installed before the oil pump.
 
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Old May 4, 2025 | 03:08 PM
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Originally Posted by Ghetto blaster
You can check with places like Dennis Kirk, or J&P Cycle, they carry re usable in line oil filters that could be installed before the oil pump.
Never!!! Imagine a plugged filter in the Feed line!!! Sheesh...clean the tank ..Good and Clean...then go!!
 
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Old May 5, 2025 | 05:11 AM
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Thanks for the replies,

I will do my best to clean the new oil tank, my concern is at the last welding, when I close the tank, so I cannot see inside anymore.
But, coming back with the question..
From the tank, the oil first passes through the tappet oil screen, then goes to the engine?
 
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Old May 5, 2025 | 09:25 AM
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You could buy a cheap borescope camera for under $50 from Amazon or Wal Mart.
bore scope camera - Google Search
 
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Old May 5, 2025 | 09:56 AM
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Originally Posted by marcelm
Thanks for the replies,

I will do my best to clean the new oil tank, my concern is at the last welding, when I close the tank, so I cannot see inside anymore.
But, coming back with the question..
From the tank, the oil first passes through the tappet oil screen, then goes to the engine?
No, passes thru the oil pump to the lower engine port (splits) to the tappet filter. There is zero filtration to the crank bearings.

People have been building custom tanks for Harley bikes and others for 75 years or longer. No reason you can't.
 
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Old May 5, 2025 | 10:01 AM
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Originally Posted by marcelm
Thanks for the replies,

I will do my best to clean the new oil tank, my concern is at the last welding, when I close the tank, so I cannot see inside anymore.
But, coming back with the question..
From the tank, the oil first passes through the tappet oil screen, then goes to the engine?
The oil passes through the tappet oil screen on the way to the tappets only. It doesn't supply the oil to the lower end. If you contaminate the oiling system with welding slag, abrasive dust and whatever else, you will be rebuilding your engine.
 
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Old May 5, 2025 | 10:03 AM
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Originally Posted by Tommy C
The oil passes through the tappet oil screen on the way to the tappets only. It doesn't supply the oil to the lower end. If you contaminate the oiling system with welding slag, abrasive dust and whatever else, you will be rebuilding your engine.
Clearly we were typing together this morning
 
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