Quote:
Originally Posted by OsoMoore
Found the main area that has epoxy. Based on the notes from the old rebuild, I think there was a moderate oil leak here, and this was a mostly successful attempt to seal it.
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Identifying the source of the epoxy is a good thing. The method of repair is rudimentary and as evidenced by the leaks on this "rebuild" ultimately failed.
We have a method of repairing this leak that has proven itself over the years. It's still a band-aid but for some, it beats disassembling the entire engine.
Number 8 Main Bearing seal kit
sup-lrk-001
The repair sleeve is designed to press fit on the outside of the # 8 main bearing so the interference fit should be about .0015- .0020 inches.
Clean case and bearing as well as possible. Use a small wire brush (like a tooth bush) and rinse with lacquer thinner or aerosol brake cleaner. Use compressed air to ensure a dry and dust free surface.
Heat the repair (small) sleeve to 180 degrees F (+ or – 10 degrees). A propane torch or hot water will suffice.
Slide the repair/sealing sleeve (smaller of the two) onto the snout of the # 8 bearing (chamfer side towards the case) until it is flush with the front edge of the bearing leaving room for the install the epoxy mixture. If it doesn’t quite go as far as flush with the end it’s ok. The pressing mechanism should still work.
Mix between 4 and 5 ml of epoxy in the red container (1) and set it aside.
Take the bolt and washer supplied in the kit and install them in the pulley. Lube the bolt end with thread lubricant supplied in the kit (2).
Take the installation sleeve and install it on the repair sleeve using the recessed end.
Take the syringe supplied in the kit and fill it with you epoxy mixture. Apply it liberally around the bearing as close to the case as possible. If you use too much you can wipe the excess off after the sleeve installation is complete.
Using the pulley, bolt and washer assembly, tighten the bolt until the pulley makes contact with the installation sleeve.
At this point, use a 19mm socket and wrench to press the sleeve all the way against the case.
Let dry for 12hrs.
Remove the crank pulley and installation sleeve and reinstall the pulley using your original bolt.
Remember to reinstall the locator pin before the final re-torque.