N Board Forum - Expanded Thread Page

Subject: Well it's begun

[Back] [Return to Top of Forum]

Jerry    Posted 08-04-2018 at 18:33:14 [URL] [DELETE]        [Reply] [Email]  
  • Well it's begun
  • I have to replace the oil pump so I decided to do a complete tear down and inspection while I was at it. It looks better than I feared. The cylinder sleeves are unscored so I got that going for me. I'm curious about the white residue on the valves (see pictures) any idea? I'll keep you posted as I continue this chore.

    Tim Daley(MI)    Posted 08-05-2018 at 04:40:25 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Well it's begun
  • Condensation? Water and oil mixed usually exhibit a whitish color. You might want to think about getting the block boiled at a reliable shop and checked for cracks. You have it almost all stripped down anyway.

    Tim Daley(MI)

    BlasterStumps    Posted 08-04-2018 at 21:48:53 [URL] [DELETE]        [Reply] [Email]  
  • Re: Well it's begun
  • It might be from"
    1. engine running lean, **
    2. additives in fuel,
    3. poor quality gas

    ** my pick

    You are ambitious. That is going to be a fun project. All the very best with it.

    Jerry    Posted 08-04-2018 at 18:34:14 [URL] [DELETE]        [Reply] [Email]  
  • Re: Well it's begun
  • Try again.

    TonyC    Posted 08-05-2018 at 10:17:57 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Well it's begun
  • Hi Jerry,

    Residue from the additive package the oil companies use to help control the amount of exhaust emissions in the fuel they produce. May have been running a little hot and lean also. You will find the residue is HARD.

    If the engine ran well, reasonable oil consumption and pressure, has good compression ran, in normal heat range prior to the oil pump failure a set of bearings, rings and valve grind would probably do the job.

    Obviously you will have to gauge all the wear surfaces, liners, barrels, pistons, piston pins, etc. If there is no ring ridge and the taper is in the mid range of the wear limits, I'd leave them alone. Replace the valve springs, they are cheap. Unless you have access to a New Way QikKut cutter or grinder you may have to send out the block to a machine shop. No need to to remove the crank.at least for the shop here.

    However if the valves look good, no pitting, not burned or wqarped, nice even shiny sealing surface slightly away from the margins and the seats look the equally good, a clean up and lapping should do the job.

    Eyeball the intake ports for heavy oily residue. Its presence indicates worn intake valve guides. It's not as prevalent in the flatheads as in the OHVs though. Easy to replace. Or..... go old, old school and knurl the guides. (OMG!!!, did he just post that? and in 2018 no less? Head slap,X2.). I know, I know if they are cast no point in even trying. I didn't replace mine. I'll have to keep the Rs down along the back straight at MIS I guess.

    FInally depending on how badly the oil pump was trashed, spend a lot of time and use a lot of solvent cleaning the rifling and oil galleries in the block, especially the crank. (I don't remember if the plugs for the rifling in the crank are accessible with the crank installed. If so try to remove them and flush the crank with solvent. Time spent here is time well spent. Minimal investment. When you get it reassembled and started I would run it for a few minutes just enough to get the oil circulated. Drop the oil and filter and replace. May not be necessary but it's something I would definitely do.

    It sounds like you have had your fingers in the guts of an engine so a time or two so some or all of this may be redundant.

    ANd finally............ If it were a Lycoming 0360 C1, (one variant is Marvel Schebler carbureted BTW) it would come out, get completely disassembled, inspected, boiled out, then reassembled with any out of spec parts regardless of TBO.

    Since I don't have a Power Plant certification, I can't get my fingers into these engines.

    However if your tractor was limping along and you were "trying to get just one more season out of it before it shells." by all means do an out of frame. ANything less is false economy.

    [Back] [Return to Top of Forum]