Engine Rebuild

Discussion in '3rd & 4th Generation 1990-1997' started by Rckslick333, Dec 22, 2020.

  1. Rckslick333

    Rckslick333 New Member

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    My 90 had a floating valve and I'm stuck in a hotel for the next few months away from my family for work so I said hey, might as well rebuild the motor.

    Planning on replacing the keepers, springs and all other associated parts because I don't know the real reason why the keepers let go on that valve. I'm tossing up the idea of replacing all keepers at this point but haven't decided yet. I have a degree in automotive, not motorcycles but the concept is still the same, don't fix it if it ain't broke!

    The ticking I heard and thought was an exhaust leak from the pair port cover up I did was actually a valve making contact with the piston. I'll post a photo in a little while of the worn carbon buildup on the piston from the repeated contact. I expected things would happen when I bought it with 75k miles on it. I'm going to be re-ringing it, honing cylinders, inspecting shift forks and probably replacing the main bearings depending on the tolerances and how many thousandths of an inch they are out.

    I previously rebuilt a f2 motor but this will be my first v4.

    My question is, to the people who have done rebuilds on this motor, what issues have you ran into and what should I expect and what parts would you consider mandatory other than the obvious rings, o-rings and gaskets/seals.

    I can also post photos of the teardown and rebuild. With the exception of the heads being on because the motor wont fit in my trunk with them installed and I already removed them haha.

    Thank you :)
     
  2. squirrelman

    squirrelman Member

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    can you get the OEM headgaskets ?
     
  3. Rckslick333

    Rckslick333 New Member

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    Thats where it gets tricky. Revzilla sells them but it will take a couple weeks to probably have them punched out. Partzilla will ship in 2-3 days but are more pricey. I'm in no rush. Done by spring is my goal. I'm going to take my time and make sure I triple check everything while im in there.
     
  4. squirrelman

    squirrelman Member

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    sad ! i wouldn't trust anything but OEM :oops:
     
  5. NorcalBoy

    NorcalBoy Member

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    Service Honda has the OE head gaskets. $43 each.
     
  6. DerekinHouston

    DerekinHouston New Member

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    Just curious, you’re doing this for the enjoyment of doing it, right? I would too but would have a difficult time justifying the cost/time vs a good used engine.


    Sent from my iPhone using Tapatalk
     
  7. squirrelman

    squirrelman Member

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    these engines are notoriously reliable so i guess the rider over-reved on a downshift maybe or has a broken valve spring. the carbon layer doesn't look (to me) thick enough to cause a valve hit, and why only one ?
     
    Last edited: Dec 23, 2020
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