Sleekcraft Rebel Project
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Sleekcraft Rebel Project

  1. #1
    Member mcgradypilot's Avatar
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    Default Sleekcraft Rebel Project

    Hey guys,
    I wanted to thank all of you for the help with my boat thus far. Special shout out to hondo, last mohican, and obnoxious. Found a few surprises with my boat today.

    So I got the motor out and broken down.

    I found a few scratches in a few of the pistons. I looked at the valve initially thinking it was the valve smacking it but they are all in random places in the dish of the piston. The valves didn’t show any sign of metal on metal. Opinions on if they are safe to use for a while? My budget just doesn’t allow for pistons. Damn BBO parts being made of unobtainium.

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    The block had mod’d drainbacks but the heads didn’t.

    The cam is a crane cams 268H

    The exhaust crossover on the intake manifold has been blocked off.

    And the whole initial reason for the breakdown. #5-6 rod bearings where spun, well, more like missing. They had disintegrated.

    On the boat side. I have decided on a name I think. “Sporting wood” I initially saw a patch of what I thought was fiberglass when I was stripping the paint. As I began to sand I realized it looked like wood grain. After a google search and finding a few boats with this wood pattern I had to strip a larger area and sure enough its wood grain.

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    More updates to come.

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  3. #2
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    Default melt down

    Quote Originally Posted by mcgradypilot View Post
    Hey guys,
    I wanted to thank all of you for the help with my boat thus far. Special shout out to hondo, last mohican, and obnoxious. Found a few surprises with my boat today.

    So I got the motor out and broken down.

    I found a few scratches in a few of the pistons. I looked at the valve initially thinking it was the valve smacking it but they are all in random places in the dish of the piston. The valves didn’t show any sign of metal on metal. Opinions on if they are safe to use for a while? My budget just doesn’t allow for pistons. Damn BBO parts being made of unobtainium.

    Click image for larger version. 

Name:	IMG_0161[1].jpg 
Views:	77 
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ID:	213618
    Click image for larger version. 

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Views:	87 
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ID:	213626
    The block had mod’d drainbacks but the heads didn’t.

    The cam is a crane cams 268H

    The exhaust crossover on the intake manifold has been blocked off.

    And the whole initial reason for the breakdown. #5-6 rod bearings where spun, well, more like missing. They had disintegrated.

    On the boat side. I have decided on a name I think. “Sporting wood” I initially saw a patch of what I thought was fiberglass when I was stripping the paint. As I began to sand I realized it looked like wood grain. After a google search and finding a few boats with this wood pattern I had to strip a larger area and sure enough its wood grain.

    Click image for larger version. 

Name:	IMG_0168[1].jpg 
Views:	83 
Size:	11.1 KB 
ID:	213634

    More updates to come.
    I am thinking, Looks Like Badd News, Melt Down is comming. Make it a little ricther atleast.

  4. #3
    AKA OhOneWS6 Last Mohican's Avatar
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    Default

    Bummer on the piston dings. Sure would be nice if you can salvage that original woodgrain. I think I already asked but have forgotten. What part of the country are you in?

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  6. #4
    Member mcgradypilot's Avatar
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    I'm in Virginia. Well I found some pistons and moly rings on eBay for a ok price. I guess if it wasn't expensive it wouldn't be a boat!

  7. #5
    AKA OhOneWS6 Last Mohican's Avatar
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    Quote Originally Posted by mcgradypilot View Post
    I'm in Virginia. Well I found some pistons and moly rings on eBay for a ok price. I guess if it wasn't expensive it wouldn't be a boat!
    You got that right. I would think you could find a decent olds motor on CL up in that part of the country. My in-laws live in Knoxville. Seems like the used car/car part market around TN, NC, VA is pretty close to what ours is in TX.

  8. #6
    Senior Member hihosilver's Avatar
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    did you have the crank checked and the rod resized with new bolts, better to check now

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    Quote Originally Posted by mcgradypilot View Post
    Hey guys,


    I found a few scratches in a few of the pistons. I looked at the valve initially thinking it was the valve smacking it but they are all in random places in the dish of the piston. The valves didn’t show any sign of metal on metal. Opinions on if they are safe to use for a while?
    Click image for larger version. 

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    We are talking a stock Olds with dished low comp pistons. Those marks should not cause any issues running those pistons. De-burr them so there are no sharp edges and it should be fine. What caused the marks? I am thinking a loose piece of metal in the combustion chamber - possibly a previous issue and the pistons were put back in service.

    Doug

  10. #8
    Member mcgradypilot's Avatar
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    Quote Originally Posted by hihosilver View Post
    did you have the crank checked and the rod resized with new bolts, better to check now

    I have another motor I snagged for 50 bucks so I had that crank mag'd and polished. I would use those pistons but they are high comp and I broke one during teardown. Now I just need to come up with 8 good rods out of the 16 I have. Ill leave that up to the machine shop.

  11. #9
    Member mcgradypilot's Avatar
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    Default Sleekcraft Rebel Project UPDATE!

    Hey guys,
    So with the warming weather here on the right coast I have been able to make some more progress on the sleek. I rebuilt my Olds 455. It was an interesting experience considering I have never done anything that major. I had the crank polished and mag'd, block dipped and mag'd. Used the rotating assembly out of my donor motor, pistons, rods, and crank. Replaced the rod bearings, piston rings, oil pump (melling stock volume), and all gaskets (mondello). All tolerances where checked and double checked as well as torques!

    The pistons are high compression stock.

    Heads are stock Ka

    Cam is a comp cams 268H. Sadly the 290 something from the donor motor was too rusted to save. From what I read the 268H is not a big power cam. I made sure all the lifters and pushrods went back into their original spots.

    Exhaust are hardin logs.

    O4B intake manifold with 750 edelbrock marine carb.

    Oil pan is a 10 quart. Enlarged the head drainbacks and added external drain back lines.

    Ignition is a Pertronix Flamethrower HEI Dizzy.

    Had a chance to finally run it today with everything wired up. Seemed to run well and had 50-60 psi oil pressure. Still need to set the timing with a timing light.

    Not looking to make big power, just get on the water and ski/drink beer/fish.

    The boat itself I have gutted. I havent found any rot but a few spots where there are some screw holes I want to fiberglass over. I built a cheap set of seats. The olds ones where rotting and falling apart. If I keep this long term I plan on fiberglass seats. The paint is SLOWLY coming off (it had six layers of paint/primer) and the gelcoat is looking like i can be saved with some touch ups. I am going to gelcoat the floor with a few layers of rolled on gel. I tested it with a quart and it seemed to make a good, non-skid, easy to clean surface. I dislike how nasty carpet gets over time.

    Changing the oil right now. Broke it in with delvac 1300 15-50 and its getting VR-1 50w I figured it would be good after running for 20 min on the trailer with the driveline disconnected. I had to build the engine outside exposed to bugs, seeds, and pollen everywhere! God knows what organic stuff got into the engine while I was building it.


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    Last edited by mcgradypilot; 04-29-2013 at 02:39 PM.
    1976 Sleekcraft Rebel: Saved from a pasture (Sold)
    1994 Four Winns 210 Horizon. Former Volvo Penta test boat 5.7 GLi duoprop

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