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Author Topic: 68 Interceptor MK1a Stuck Piston or Spun Bearing  (Read 748 times)

RAP

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68 Interceptor MK1a Stuck Piston or Spun Bearing
« on: July 10, 2010, 10:50:22 AM »
Father just acquired 68 Interceptor MK 1a that has been in storage for about 35 years.
Bike was apparently purchased and ridden for 6900 miles and then suffered some calamity. Bike was placed in storage after engine issue and never ridden again. One cylinder is clearly stuck and not the one you would expect of this model. Dad purchased some new wonder product marketed in Canada to free issues of this nature and has begun the methodical thump with air tools to free the piston. Bike is worth restoration as it was clearly not stored in a harsh environment and is in remarkable condition other than this issue. Any US information would be appreciated, parts suppliers, useful engine rebuild tips etc.

Thanks for any input! :)

ERC

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Re: 68 Interceptor MK1a Stuck Piston or Spun Bearing
« Reply #1 on: July 10, 2010, 09:49:05 PM »
Remove  the timing, primary chains to just have the engine pistons and crank without any other drag on it . Fill the frozen cylinder with PB Blaster and let it sit a day or so then hit top of piston with block of wood. If this doesn't do it then try heat.  ERC
2-57 Apaches, 2-57 Trailblazers, 60 Chief, 65 Interceptor, 2004 Bullet, 612 Bullet chopped.

RAP

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Re: 68 Interceptor MK1a Stuck Piston or Spun Bearing
« Reply #2 on: July 10, 2010, 10:45:16 PM »
Thanks ERC,

We had left the cylinder full of  a product similar to PB for about four days before attempting any movement. It would not budge. This afternoon it came free after closing valves and pumping in grease. Scary but effective.
Now he can see what can be done with this for rebuild of engine.

Any further information or helpful hints would be welcome, particularly parts supply.

Thanks Again

Ragmas

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Re: 68 Interceptor MK1a Stuck Piston or Spun Bearing
« Reply #3 on: July 10, 2010, 11:39:55 PM »
pictures my good man, pictures.

Sam
2009 G-5 Military
Little Falls, NY

RAP

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Re: 68 Interceptor MK1a Stuck Piston or Spun Bearing
« Reply #4 on: July 11, 2010, 12:08:41 PM »
Ragmas,

This photo was taken after the unload into the barn with seat and signature chrome tank removed.

Photo does not do the bike justice, all numbers match and tires appear to be original.

Tank has a couple of small dents dad would like removed as well as cracks in tips of fenders. Any suggestions for anyone that does chrome work / tank repair in the states would be welcome.

Thank you

Ice

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Re: 68 Interceptor MK1a Stuck Piston or Spun Bearing
« Reply #5 on: July 12, 2010, 07:38:32 AM »
 Congrats on your dads find may you both enjoy the restoration and the rides to follow ;).
I can break it better,,,,at night, in the rain, on the trail,, 20 miles from nowhere.

REA #136

"TIMEX", the '06 Iron Barrel Military that takes me everywhere I want to go... and some places I shouldn't.

RAP

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Re: 68 Interceptor MK1a Stuck Piston or Spun Bearing
« Reply #6 on: July 12, 2010, 09:16:21 AM »
Thanks Ice,

As my Dad is 75 he will probably not be riding this much when this is complete although I would not put it past him. Having been witness to some other bikes he has completed, a mid 60's Ducati,  I look forward to the process and the resurrection of this machine. Will send photos periodically throughout.