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Twincam lifer

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Old Oct 10, 2024 | 12:54 AM
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Default Twincam lifer

Hi. The left side was removed from 05 twincam. The right side is the newly bought lifter. (harley 18538-99c) The oil hole position is different. Is it compatible?
 
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Old Oct 10, 2024 | 06:37 AM
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Position of the oil hole makes no difference
 
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Old Oct 10, 2024 | 06:46 AM
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Originally Posted by eighteight
Position of the oil hole makes no difference

If so, where should the oil hole position go?
 
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Old Oct 10, 2024 | 06:53 AM
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Originally Posted by Guuuuns
If so, where should the oil hole position go?
Does not matter
Oil under pressure will flow around the small diameter section and find the hole
 
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Old Oct 10, 2024 | 08:44 AM
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Originally Posted by Guuuuns



Hi. The left side was removed from 05 twincam. The right side is the newly bought lifter. (harley 18538-99c) The oil hole position is different. Is it compatible?

As mentioned, the oil hole location doesn't matter. And I think the one on the right is an older "B" lifter...



FWIW...

I would not put a Harley "-99C" lifter in any of my Twin Cam bikes...

Your '05 bike came OEM with the "-99B" lifters. They are considered to be one of the better lifters HD ever offered. I wouldn't hesitate to re-use a "-99B" lifter.

The "-99C" lifter became OEM in mid-2011, they are considered sub-standard as far as lifters go. Calling them "sub-standard" would be kind in the opinion of many others.

Anytime I go into a Twin Cam engine with the "-99C" lifters, they get replaced with better lifters. I put cams in a both a 2012 and a 2016 Twin Cam. One was under 5K miles and the other around 10K miles, both got new lifters and the "-99C" lifters went into the trash...

If you are in the cam chest, I would also suggest replacing your inner cam bearings. You have INA brand B-148 caged bearings as OEM. I would install the better replacement Koyo B-148 captive needle bearings. There have been several reported failures of those INA brand B-148 bearings which can lead to big $$$$$ repairs.

I would not go into the cam chest just to replace the "-99C" lifters or INA brand inner cam bearings, but consider them an excellent, inexpensive preventative maintenance step any time I go into the cam chest for any reason...

Good luck with your lifter install...
 
Last edited by hattitude; Oct 10, 2024 at 08:48 AM.
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Old Oct 10, 2024 | 12:40 PM
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I saw the thread title and thought you were pledging your allegiance to twin cam motors and would never buy an M8...lol.
 
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Old Oct 10, 2024 | 07:27 PM
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I thought you meant you were a twin cam lifer, after seeing the lifter harley is putting in the M8s.
 
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Old Oct 13, 2024 | 10:28 PM
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As always hattitude.
 
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