Cam Shaft oil seal - Page 2
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Thread: Cam Shaft oil seal

  1. #11
    Senior Member Kerosene's Avatar
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    Quote Originally Posted by 66Sprint View Post
    If it doesn't leak it should be fine.......
    I didn't think this was causing a leak, but now it has me second guessing myself. And with engine pulled, I just want to make sure it's right. I didn't have oil in the points housing, but a lot underneath the points housing. I initially thought it might have been the cam case gasket but I wonder if it was because this seal wasn't installed correctly.

    I can get the seal to look "normal" when I install the seal directly onto the camshaft. The spring stays in place and the seal lip faces inward. But when I put the seal in the housing and slide the camshaft through, the spring pops off and it looks like the picture in my original post.
    74 CB350F
    72 CL350

  2. #12
    Senior Member Kerosene's Avatar
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    Wait, I think I can get the seal to work if I install the seal after the camshaft is inserted into the points housing? Boomer, is this how you do it?
    74 CB350F
    72 CL350

  3. #13
    Sensei 66Sprint's Avatar
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    The garter spring should stay in its groove internally and the lip of the seal should "point" inward........
    For the nominal cost of a seal, I'd just replace it with a "known to fit correctly" part, and order the seal from Honda...
    Did you lubricate the sealing lip during install?
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."
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  5. #14
    Senior Member Kerosene's Avatar
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    Quote Originally Posted by 66Sprint View Post
    The garter spring should stay in its groove internally and the lip of the seal should "point" inward........
    For the nominal cost of a seal, I'd just replace it with a "known to fit correctly" part, and order the seal from Honda...
    Did you lubricate the sealing lip during install?
    Correct, I did lubricate it. Right now, I'm just loosely testing to see if I can get the camshaft to slide into the seal correctly and it never does. Just kinda bulges out and pops. This doesn't seem to be the best design. Sucks, I have everything needed to reassembly the engine tonight and install tomorrow but will have to wait. I think I'll source the OEM Honda seal.

    Thanks for the insight into this.
    74 CB350F
    72 CL350

  6. #15
    Senior Member Kerosene's Avatar
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    The strange thing is, if the seal is reversed, the camshaft slips into the seal perfectly and the spring stays in place....
    74 CB350F
    72 CL350

  7. #16
    Senior Member doode's Avatar
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    Not being there to see it, I would say the spring isn't seated correctly... Too shallow perhaps.
    You can fuss with it til you get it, or as Sprint66 recommends, source a replacement.

  8. #17
    Senior Member Kerosene's Avatar
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    After fiddling with it for a bit, i managed to get the camshaft through very slowly while working the lip inward as i pressed it together. It now looks seated properly and the spring stayed in place.
    74 CB350F
    72 CL350

  9. #18
    Senior Member doode's Avatar
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    This is something you'll want to be 150% confidant about. If it comes apart at 7000rpm you'll wished you'd invested in the replacement

  10. #19
    Senior Member Kerosene's Avatar
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    Update: A couple days ago, i got the engine back into the bike with all necessary adjustments, etc. I took the bike on a quick 10 mile or so ride. Keeping the revs up and down. She's running very well!

    Good news. The oil leak is gone along the top of the engine. Today, i removed the points advancer to double check the camshaft seal and all looks normal.

    Semi-bad news: The clutch push rod seal is now leaking. Wasnt before. I have all 4 seals on order to replace behind the clutch cover. Im sure after the fresh oil and finally being ridden after who knows how long, these little things will pop up.

    I have no history of the bike before me so i dont really know when it last ran. But im thankful it shifts well and has power through all the gears. Feels like a solid bike.
    74 CB350F
    72 CL350

  11. #20
    Senior Member doode's Avatar
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    Only replace the pushrod seal. Don't fuss with the others unless you need to
    The pushrod seal is easy.
    Thanks for the update. Good to hear all went well

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