Disassembly of a 69 Z/28 DZ Three Oh Blew Engine

[resto4u]

If you don't have a crack in the cam section and just two sleeves, save it.

[PxTx]

This scares me from considering trying to save it. Sorry for the phone edited pic. Thanks for sharing Jason.

[enio45]

stock cam??

[SuperNovaSS]

Thanks for the replies guys. I didn't see any stampings on the cam. I believe it was a stock replacement. I believe a threadsert in the cracked threads along with the sleeves should fix the problem you are pointing out. I have had blocks that were good runners for a long time with that type of repair. It is lifter valley, cam journal, and main area cracks that I could not see that would make this block junk. I agree this block would be a boat anchor already if it was most any other application. Can you imagine how many other DZ blocks with less damage were tossed out since it was just a 4 inch bore 4 bolt block?


Jason

[enio45]

nice write up and tutorial :-)

thanks for taking the time to do this

[SuperNovaSS]

My pleasure. As I said, I plan to do more soon. Hopefully some media blasting tutorials since the blasting cabinet is a good place to hide of the rain [img]<<GRAEMLIN_URL>>/smile.gif[/img]


Jason

[ds1]

400 block decks Crack all the time. My best runner had several cracks. The machine shop was not concerned. The Threadsert will go in first and make the deck stable. Then the sleeves will take care of the cylinders. My brothers 73 Corvette had the worst block casting I have seen. It was porus. Looked like black pepper down inside it. When he rebuilt it and torqued the heads all the bolts on the driver side top of the deck pulled out. But it was the OE engine so all the holes were helicoiled and found one of the cylinders cracked. Sleeved the bad cylinder and rehoned the adjacent cylinders because of shift. Way to much work for a two bolt main 350. But the original for his car, number matching.

[69z28302]

Love this stuff. Let's hope it's salvageable

[Plowman]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pxtx</div><div class="ubbcode-body">


This scares me from considering trying to save it. Sorry for the phone edited pic. Thanks for sharing Jason. </div></div>***Damage produced when something is dented.

[njsteve]

I like that camshaft photo. Looks like the prototype camshaft for the infamous GM V8-6-4 that Cadillac used. [img]<<GRAEMLIN_URL>>/naughty.gif[/img]