I’m done with old engine

i take it you never have had a machine shop cut a crank wrong before? there a reason we mic the crank after it comes back fron the machine shop.

like I posted already. the noise was coming from the front of the block, behind the harmonic balancer and i now have both engine’s on engine stand with there oil pan’s off. the first one had both front rods and the crank damage. the new crate has a loose rod. I’m not a rookie when it comes to engine. I have built many engine’s in my life time,from straight stock to race engine’s . I also have work at engine rebuilt shop in the past. of all the engine’s I have done or play with. I only have had 3 that failed for some reason and it looks like when some one else had built the engine.
first one was 30 yrs ago, a 1970 351 Cleveland 4V and then these two 307 olds.
now any Cleveland I build , I modify the 351C oil system to have full oil pressure at the back of the block also. THE 307’s, I would have to say some thing failed for some reason on the front rod bearing/crank. if was poor pre lube on the crate engine, I would also have other rods with problems but i don't .


so let just say it karma and look forward to the heart transplant that the Buick is getting!

 

if your gonna do a heart transplant and drop a chevy motor in it....why not pull a silverfox..and go big block!

 

because this big old boat going to be cruzing down the highway mostly and big block's don't get 24+ mpg like this SBC did in the caprice it use to be in.

i already have a big block rig that's get 10 MPG, why would i want two highway travelers that get sucky gas mileage?

 

Actually, I think you are doing the perfect thing for that Box wagon. If you are going with a entire Chevy drive train, that's good........I always thought that would have been the perfect thing for these underpowered wagons. I thought that they should have used the Olds 350 if they had to use an Olds engine but a Chevy 350 if they didn't need to use an Olds engine. The problem was that they were trying to meet the G emissions standards so played with the 307. It didn't work out too well though. That wagon should be just about perfect with what you are going to put in there. Keep us posted....I always wanted to find out how that would work out. I THINK it will work out just about perfect.

 

I haven't and likewise check before assembly. Sounds like you did your due diligence.
The Olds are notoriously poor oilers but even so it's really disappointing to see one die in a thousand miles.
I did once install a re-man engine that developed a knock straight away. The post mortem revealed a rod bearing inserted with the tabs on the wrong side. How somebody managed to tighten the cap without noticing is beyond me but it happened. It knocked briefly on first firing (after proper pre-oiling) then quieted down until a few hundred miles later. Builder stood behind it reluctantly and even chipped in a token labor amount.
Any post mortem on yours?