Yep-
My BBC was a 1996 Gen 5. Windowed the block.

Built a 1998 Gen 6, used the same Dooley oil pan.

Timing covers were different. 10 bolt gen 5  vs. 6 bolt gen 6.

Thanks guy    I have gen v with a burned piston outa of a motor home in going to be redoing


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The ten questions;

What oil?

What oil filter?

What oil pan?

What block?

What where the rod clearances?

What were the main clearances?

What bearings?

How many RPM max?

Is it just the rods, or do the mains look like crap too?

Any idea what oil temp?




GT

Mobil 1 full synthetic 10-30

Bosch filter I usually run a Delco pf454

Oil pan I'm not sure of it was the one that came with my motor already in the boat holds about 7 quarts

It's a hi perf passenger block 2bolt main I looked up the casting numbers and it came up as 2bolt or 4 bolt is a 78 I'd have to look it up again it's been awhile

My clearances I wrote them down I'll have to go back through my stuff I platigadged them and I remember there where dead on

Bearings where clevite

Rpms 4-4500 max never for long

And I'm going to pull the rest of the caps and mains tomorrow.  I seen this and called it a night


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Did they kinda look like this



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There journal looks ok I think I misuse caught it in time



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Had something similar happen as well, nothing at idle, nothing on the trailer, sounded like an exhaust leak, mine was the number 7 rod bearing though, got hot and spun but didn't demolish itself so the sound wasn't what I expected


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That's kinda what I'm thinking to guess I won't for sure now till I pull motor 2 season ago I spun cylinder 8's rod bearing  but couldn't hear it at a idle but was able to hear it when I left off the throttle it give a couple wrap sounds and then settle down  thank for the info guys


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Big block 454  went out a couple days ago  ran great except I'm hearing what sounds like clatter not a knock just sounds like noisy valves I can only get the boat to do it when it's under a load ... now I have through transom headers  it kinda sounded like the exhaust flappers but I got to thinking u can hear it in the boat  can't hear it at and idle can't hear t one the trailer    Anyone else have a exhaust leak that sound like pinging valves ? Oil pressure is good 38-40 per the gage ... 


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