Rebuilt 340 knocking sound

[65 Cuda 340]

If I bought a used/rebuilt motor, I'd take it apart and check everything before running it. You never know what evils might be lurking inside if you don't.

 

[Dave_J]

If I bought a used/rebuilt motor, I'd take it apart and check everything before running it. You never know what evils might be lurking inside if you don't.

At least the oil pan, main bearings, valve covers and peek at the cam lobes. Check the oil pickup screen. What, $30 in a cheap gasket set?

 

[plumkrazee70]

@replicaracer43 Receive the motor yet?

 

[AJ/FormS]

Compression doesn't have anything to do with knocking, probably a assembly error by whoever built it. Where are you located?

Hang on man;
Compression RATIO is fixed, but
compression pressure varies with the actual closing of the intake valve.
Obviously in this case, a rod-knock has nothing to do with either, but IMHO you need be more accurate.

 

[replicaracer43]

@replicaracer43 Receive the motor yet?

Supposed to be arive today actually

 

[replicaracer43]

Hang on man;
Compression RATIO is fixed, but
compression pressure varies with the actual closing of the intake valve.
Obviously in this case, a rod-knock has nothing to do with either, but IMHO you need be more accurate.

Ok, let me try to be more accurate then.
Engine is knocking.
Compression is a mute point.
Engine probably had a assembly error resulting in the knock.

 

[dartindanno]

Keep us posted, sounds like a learning experience for some of us

 

[replicaracer43]

Engine arrived at the shop today, we took a quick minute to look it over, and pull the top end off. Its definitely not good! I will start a teardown/build thread on it, if someone more computer literate than me can post a link here, after I do so.

 

[plumkrazee70]

The official FABO machinist/member collaboration, busted 340 thread

 

[Ironracer]

You would be amazed what a hot tanked and never started rebuild will look like inside after sitting for 1 1/2 years.

I live in the Humid South. And when I build something, it's in stages. Yes, I'll bag em up, but they are stored outside. I've never seen no crazy crap like that. HOWEVER, that's an Engine every now and then. Not a mill a month.... so my experience Don't make me the Be all, End All Authority