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Thread: Oil pump siezed up

  1. #1
    Junior Member Biker
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    Sep 2006
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    Central Texas
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    Oil pump siezed up

    Took bike out for a ride 2 weeks ago and after a mile noticed something that felt like something holding the bike back only for a second. I then noticed the oil light on and the oil pressure gauge at zero. I turned around and went back home. I tested the pressure sending unit and it was alright. I then took the oil pump cover off and noticed the gears were siezed up. I pulled the first gear out and noticed nothing unusual. The drive gear behind it had a gear key weadged between it and the idler gear. Had a hard time pulling the pump apart. Then had to chisel the drive gear in half. noticed the shaft was compleatly wasted. also noticed the drive shaft would not turn. pulled the gear case off and there was the worst mess.
    The oil pump main drive gear that rides on the oil pump pinion gear were both completely distroyed. Now, the problem...The engine has 81,000 miles and inorder for me to remove the oil pump drive shaft I will need to pull the engine from the transmission. And being a 97 Injected engine harley only offers remanufacturing. I cannot buy a new 80cu injected engine.
    The only other option is an s&s 124 that is compatable with my m&m injection for a mere 8,400 dollars.
    not many choices are there.
    Jack

  2. #2
    HCG Technical Senior Member JD's Avatar
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    Re: Oil pump siezed up

    Ouch. That's a biggie. You should be able to install your entire intake on any replacement 80" engine. I'd maybe try a local/indy shop who would be willing to break it all down and rebuild it bottom up as an option.

  3. #3
    HCG Technical Senior Member Relic's Avatar
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    Re: Oil pump siezed up

    With that much mileage, I'd say the cam bearing exploded on ya and the oil pump picked up the pieces and jammed. Better check that cam bearing as well. BTW, if ya go to the local HD dealer and have the engine sent to the factory for rebuild, it will cost you a lot less and you get a spanking new motor in return. (including a new powdercoat)
    My Golf Swing is so bad, I look like a caveman killing his lunch.

  4. #4
    HCG Technical Senior Member
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    Re: Oil pump siezed up

    agreed with relic....in a weird way, the earlier (85-86, not the very first ones) were better than the later versions. the cases were stronger, and they also used a torrington inner cam bearing. these bearings had more rollers and were far superior. post-90 models switched to an ina bearing- less rollers. i've heard several reasons why- less costly, more forgiving of tolerance variances, etc. but bottom line is that your motor should be torn apart completely and inspected. once down, choose superior quality replacements....or go with an exchange as suggested...

    fwiw-

    j

  5. #5
    Senior Member Senior Member
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    Apr 2005
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    Re: Oil pump siezed up

    If your going to send it out you might give this guy a call.

    http://www.jps-johnsperformance.com/shop.htm
    Never fight with a fool, others may not be able to tell the two of you apart.

  6. #6
    Junior Member Biker
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    Central Texas
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    Re: Oil pump siezed up

    After 3 months I got tired if seeing that bike sit in the garage. I pulled the cam and noticed the lobe worn badly on the back cyl intake. I checked the lifters and found a needle bearing fell out of the roller that caused all the trouble. Pulled the engine and is getting rebuilt at my local shop. Not H-D dealership.
    $2500 dollars and getting much better replacement parts then stock.

  7. #7
    Junior Member Biker
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    Re: Oil pump siezed up

    I thought I would update everybody on my bike. I put the rebuilt engine in a couple of months ago. My rebuider gave me the old parts when I picked up the engine. It seems that the lifter that had all the play in the roller did not lose a roller bearing after all. It was very loose and did damage the cam lobe, but it seems that a piece of bearing cage from the pinion bearing was what got into the oil pump. I have all new bearings, Pushrods (ADJ), EV 13 Andrews cam, 10 over pistons. Complete rebuild for 2,600 dollars. The engine runs great except it seems to be running a little lean now. I have tryed every thing including adjusting the power commander. I think I may need to install my stage one injectors. I would'nt think that 10 over pistons and a EV 13 cam would make that much differance but who knows. Any thoughts?
    Jack

  8. #8
    HCG Technical Senior Member JD's Avatar
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    Re: Oil pump siezed up

    Have you tried a pull on a dyno with an exhause CO sniffer? That will tell you the true a:f story.

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