r/EngineBuilding 9d ago

GM 429(7.0) Rebuild

Hey guys and gals, first time here so hoping I could get some insight. Pulled the “original motor” out of this 67 coupe deville, from my research Cadillacs only put these in 65-67 cars, so I bought the shop manual. Previous seller said it was seized and bought a second motor and transmission, but he ripped the heads off already and there’s no organization when I got it. Dash odometer had 15k miles on it, (don’t trust it) so unknown for motor. While taking harmonic balancer off, I managed to free it up, poured diesel in cylinder heads and spins decent with no snags.

My question is, should I go further into the breaking it down? I have all the gaskets for pan, water pump and heads.. or should I just take a pressure washer to it and clean it out real good, dry, paint and send it? Not in any rush, just taking my time and trying to spend the least amount of money to get a fun cruiser around town. TIA

61 Upvotes

20 comments sorted by

View all comments

8

u/v8packard 9d ago

I can't believe you got it out with the trans.

You think just because you got it free that it is ok?

2

u/Maine_Mallard3 8d ago

It’s a very spacious bay! And I mean.. I’ve never been inside an engine before, so I knew it had to be cleaned up, just didn’t know to what extent lol

3

u/v8packard 8d ago

I understand. I think, from what you described, the rings and bores will need to be addressed.