crankcase filling with oil?

sadavis73 · #1 07-05-2008, 11:19 PM

2005 Twin cam 88b, started loosing power badly today and emptied oil tank. Pulled allen plug on crankcase and emptied over 2 quarts of oil. Refill oil tank and ride down road and lost power again and oil tank is almost empty again. I havent run into this, it is a high compression&nbsp\\; 95 inch gear drive cam set up. Any thoughts?

Shovelhead Bob · #2 07-05-2008, 11:45 PM

Scavenge side of the pump is not working..... Either the o-ring has failed, the gerotor has failed, or there is a blockage in the return (Highly unlikely on the blockage).....
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How long ago was the bottom end serviced????

sadavis73 · #3 07-06-2008, 12:20 AM

Engine has 13k miles on bottem end, cam install was done 4200 miles ago. I figure its and oil pump problem but i dont have much experience on how it operates on these. I am a car mechanic by trade.

ajayrk · #4 07-06-2008, 09:42 AM

I'm in agreement with Shovelhead Bob.&nbsp\\;&nbsp\\; O-rings are leaking.&nbsp\\; Four o-rings in cam chest, Two on the oil pump and two that seal the cam plate to the crankcase.&nbsp\\; Remove the exhaust. remove the cam chest cover, remove all the screws from the cam plate and pull the cam plate out.&nbsp\\; Pull the oil pump out, but take note of the order of the gears, spacers and wave washer.&nbsp\\; Replace the o-rings and reassemble.

Post me your email address and I will send you a pdf that includes an exploded view of the oil pump.

ajayrk · #5 07-07-2008, 08:36 AM

Use this link to view a pictorial of a gear drive cam installation.&nbsp\\;\\\\\\;\\\\\\\\\\\\\\; http://www.harleyhog.co.uk/1550/bbonline.htm

Also a chain drive cam change.&nbsp\\;\\\\\\; http://www.harleyhog.co.uk/camguidepage1.htm

And Here.&nbsp\\; http://www.harleyhog.co.uk/tensionerinstall.htm

If you don't already have quick install push rods I suggest you use the new Harley tappered quick install kit. It has all the o-rings and new tubes and push rods included in the kit.&nbsp\\;\\\\\\;\\\\\\\\\\\\\\; Cost about $160.&nbsp\\;\\\\\\;\\\\\\\\\\\\\\; Saves you from removing the tank and rocker box covers.&nbsp\\;\\\\\\;\\\\\\\\\\\\\\; The tappered push rods are less likely to rub the upper push rod tube.