HD High Volume Oil Pump O-Ring
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6th Gear
Joined: Apr 2007
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HD High Volume Oil Pump O-Ring
It's been stated that the new HD hi flow oil pump does not use the rear o-ring that is used on the original pump. THIS IS FALSE! The new pump - according to HD requires that you replace the original #11301 o-ring for use with the new hi-flow pump. This may explain the sump issues thst some have mentioned? I'm no expert; just learning as I go! I've been working on my (2002 FXDWG) 95" BB/Andrews TW37b cam build for several days now. I could have had it done by my local tech - but what fun would that be? I just hope the 2009 heads work out okay. (Chewing my nails...)
I'm going with:
New BB cylinders
New 44 CV Carb
New BB Pistons (Harley/Kobenshmidt)
Andrews TW37b Cams
James .036 head gaskets (or Cometic .030) I'm hearing about leak issues with the Cometic...
Stock 2009 Dyna Heads
Daytona Twin Tec Ignition (If I have Bean re-work the heads to 9.5 compression or higher)
I want to keep the compression in the lower range. 9.5 sound good. I don't want my CCC to be over 180 psi. I'd prefer 178 psi... I'm thinking that comp releases may still be a good idea?
I'm going with:
New BB cylinders
New 44 CV Carb
New BB Pistons (Harley/Kobenshmidt)
Andrews TW37b Cams
James .036 head gaskets (or Cometic .030) I'm hearing about leak issues with the Cometic...
Stock 2009 Dyna Heads
Daytona Twin Tec Ignition (If I have Bean re-work the heads to 9.5 compression or higher)
I want to keep the compression in the lower range. 9.5 sound good. I don't want my CCC to be over 180 psi. I'd prefer 178 psi... I'm thinking that comp releases may still be a good idea?
Last edited by jcoopercam; Jun 23, 2009 at 11:03 PM.
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Joined: Jun 2006
Posts: 28,552
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From: Vermont
It's been stated that the new HD hi flow oil pump does not use the rear o-ring that is used on the original pump. THIS IS FALSE! The new pump - according to HD requires that you replace the original #11301 o-ring for use with the new hi-flow pump. This may explain the sump issues thst some have mentioned?
First I heard of this. The new pumps don't use the o-ring on the front of the oil pump where it goes against the cam plate as the older ones did. The rear o-ring has been used on the old ones and gets used on the new ones.
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