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

[Dusk Blue Z]

Hi Jason,

I was trying hard to read the assembly date on the front pad, is it a 03 or 05?. Has the block been lightly fly cut? Is there a LOS vin stamped on there too? Thanks.

Mike

[Lynn]

03

[SuperNovaSS]

Yes, the block was lightly surfaced at some point. The assembly code is V0321DZ and the partial VIN is 19L528983.

[tom406]

Check out the giant 2. So goofy you know it's real

[miket1]

It can most likely be repaired, nice show.

[resto4u]

yeah, that guy had a bad day and grabbed the wrong stamp into the gang holder. I have seen a few oddities on los engines. have see one where they mix up the partial vin# order and put the L first, then year and vin#

[427TJ]

Yep, they're still out there! Still gettin' blowed-up too!

[Day2_69Z]

Oh,,, don't look soo bad....
Looks like an EBay engine Joe Billy Bob Rebuilding service sells as great condition, complete , standard , just needs an overhaul kit and assembly.....feed back -09 37%......

I may be embellishing this scenario, but a lot of us have seen similar ads in media & i-net and have chased the leads to similar results......The seller assumed the worse I hope as Jason hoped for the best.......
Awesome post Jason along with nice pics ..
other than the rod journal damage it looks like a few counterweights are damaged....Yes, No, Maybe ?

[SuperNovaSS]

The counterweights have a few nicks but nothing catastrophic. The seller actually expected no damage to the block or crank. We came up with 2 prices. One price was higher and came with a unwind clause if there was damage and the other was as is. I am a gambler and went with the as is. The internals could have been much worse in my opinion. Thanks for all the replies guys. I am going to do another post soon about media blasting.


Jason

[Day2_69Z]

. The seller actually expected no damage to the block or crank.

Jason[/quote]

Jason, I'm sorry but I can't stop laughing at the sellers expectations especially as I look at the pan ..... he must of been the one that didn't change the oil or have the timing set nor the valves set not even to say why
in the hell would you rpm a high revving motor Without Screw in studs ,or let alone pinning them.....Who ever blew it up EARNED that Pleasure of hearing how mechanical catastrophic pleasure sounds..... [img]<<GRAEMLIN_URL>>/crazy.gif[/img]

This had to been locked up and I bet overheated, I wonder how tight the rod bolts were when you untorqued them for removal....
still laughing but now at myself knowing the former owner of my Z/28 blew it up &quot;way better&quot; than yours.
The motor was already heavily worked on the drag strip, street and road racing.....sleeved in 4 cylinders, line bored twice, maybe 3 times before and only decked 4-5 thousaths.....roller cam with gear drive on a street n strip car, not a good idea.
Needless to say, anything that can happen to an engine blowing up happened to this lil 302...It Grenaded !
with only the top end and externals salvaged....... funny but not that funny when it happens to your own stuff.....

Tom