Need help identifying a Cat 3406

I believe we did. I've pulled many cylinder heads but this one has me scratching my head. It appears that the only thing holding the head to the block is whatever's left of the gasket material.


http://i23.photobucket.com/albums/b360/spf150/KW/05082012001.jpg
http://i23.photobucket.com/albums/b360/spf150/KW/05082012003.jpg

 

THANKS! After removing the last 6 bolts that hold the rocker assembly in place the head popped right off. After popping the head off we immediately noticed that the #6 piston was shattered, the damage was definitely old damage. Guess that solved the mystery of why this motor had such bad blow by...LOL

 

The in frame kit I ordered has all new pistons and sleeve liners. The kit hasn't shown up yet so I'm not sure if the new parts are aluminum or steel but if I had to guess aluminum.

Made a bit more progress today, to my surprise I popped the oil pan off and found what appeared to be a recent gasket set as well a brand newish oil pump and sump screen.

My question for today is this, on the front and the rear of the crank there is a 'wheel' with 12 threaded holes where the flywheel bolts to one side and the harmonic damper to the other. I'd like to remove the front cover as well as the bellhousing adapter, do these 'wheels' need to be removed before the front cover and bellhousing adapters can come off? I have the front cover to the point where it will wiggle but I'm afraid to put a ton of pressure on it and crack the cast aluminum.

 

Cylinder head finally off


Broken piston


Front cover

 

Ended up answering my own question. The front cover and bellhousing adapter just slide off, the hubs on either end of the crank stay in place. The resistance I ran into while taking them off was the front and rear main seals. The rear main was blown out and the front main was starting to go.

The clutch parts came in today! Still waiting on a few other parts to come in before I can proceed further.

 

Anybody know what size the bolt heads are for the main bearing caps, 33mm? My 1-1/4" socket is too small and the 1-1/2" is much too large, never been good with metric stuff. Thanks!