Massive detonation = failure

[Chopper pilot]

Hi All,

Got the 68 2000 back from California yesterday. Took the engine apart today. Pulled the head and found the #2 piston FUBAR. It looks like the shop that re-built the engine 1800 miles ago mess it up.

The head is 4.490 in height. (been shaved a bit) Dist is a 17.5 degree advance unit and the timing on the dist base plate was cranked over.

The pistons are .40 over and I have a aluminium lip at the top of the cylinder bore. The head I think could be fixed but as it is so shaved already which way do I go?

Would like to keep the car a U-20 not all that excited about a swap.

Thanks

Phil

[spl310]

An aluminum lip? You mean that the engine was depositing aluminum in the cylinder? Got pics?

Heads show up on eBay with regularity. There was a great deal on a solex motor on Craigslist.

[Chopper pilot]

Yep,

aluminium deposited right on the lip of the cyl bore. I'll post some pics tomorrow. I talked to my buddy in town tonite. He has a U-20 I may be able to buy. It has a broken chain but the head is stock no shaving. I may just re-build it.

Should know tomorrow. Ordered a repair manual from Mike Young today.

[dbrick]

Chains are cheap and available, as long as the gears are good