Twin Cam Motors Twin Cam 1998 thru 2017

Twin Cam O-Rings

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Old 03-05-2023, 12:49 PM
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Default Twin Cam O-Rings

Anybody know if the O-rings on the 2 dowel pins on the top of the cylinder 2001 motor (between head and cylinder) are the same size as the O-ring on the single dowel pin at the base of the cylinder?
Harley gave me all the same size O-rings, but it seems the two on the top of the cylinder underneath the head Gasket should be thinner.

Or if anyone knows the part number of the newer gaskets that eliminate the top O-rings all together

Thanks
 
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Old 03-05-2023, 01:32 PM
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You could look in parts manual. There are some online ones too.
What I hate is cometic just gives mess of everything. I did an entire engine kit last year my 01. It is frustrating digging through. Next time I'd be tempted to go to a dealer and go part by part.
 
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Old 03-05-2023, 07:51 PM
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Same, same, if using oem harley head gaskets according to Ronnie's parts finder

if using cometic mls head gaskets, o-rings are not used at head dowels
 
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Old 03-06-2023, 09:24 AM
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It's a -013 US O ring.. Look closely at the head gasket. You use the O ring is the HG is stock OEM and THERE IS A GAP BETWEEN THE DOWEL AND HG THAT THE O RING CAN DROP INTO.. No gap, No O ring.. IIRC All later OEM headgaskets don't have the space / gap so they are not used. Aftermarket HGs you've have to check. Cometic -- No
 
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Old 03-07-2023, 10:10 AM
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I just looked up both part number for the O-rings and the Head Gaskets.16775-99b for the gaskets and 11273 for the O-rings. All three O-rings have the same part number..
 
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