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Hitting on 7 of 8 again...

Got the slugs out today.

2nd piston ring on #8 was sticking. All the 2nd rings were not seated in properly.

Found another crack in a main outer bolt hole on a different main and different side of the block.

We will see how long it will last before cracks fail it. Got all the parts to put it back together.
 
Got the engine stuffed today. The more of these you do the faster it goes. This is like #5 pulling a 1993 out and the 6th engine swap.

40 rings to put on with a split rail oil control and 2 rails for the gapless 2nd. 48 parts if you count the oil control ring expander. This and swapping rods to the new pistons took an afternoon.

I used a set of high mile 6.5 heads this time from the 1995 engine that was worn out in this truck when I got it. The possible bent valves and screw impact were enough to set the 6.2 heads aside. The precups, although easy to swap, were also severely cracked as found after cleaning them up.

The water damage still shows on the #2 bore after the deglazing. (It had then 30K miles ago when I first got it and wear did not remove it. Just a etching color pattern you can see but not feel. Upper end had a ring ridge. Should be able to seat the rings now.

ARP studs saved me a set of head bolts again - this ARP set is paid for now! :agreed:

Vibration damper had 1/4" of rubber coming out on both sides so it went to the dealer for warranty. The serp pulley had moved 1/2" so the rubber on it had also failed. Although it hadn't hit the metal stops yet.

Got a couple hours of work left before I get it smoking Monday.
 
WarWagon said:
Got the engine stuffed today. The more of these you do the faster it goes. This is like #5 pulling a 1993 out and the 6th engine swap.
40 rings to put on with a split rail oil control and 2 rails for the gapless 2nd. 48 parts if you count the oil control ring expander. This and swapping rods to the new pistons took an afternoon.

I used a set of high mile 6.5 heads this time from the 1995 engine that was worn out in this truck when I got it. The possible bent valves and screw impact were enough to set the 6.2 heads aside. The precups, although easy to swap, were also severely cracked as found after cleaning them up.

The water damage still shows on the #2 bore after the deglazing. (It had then 30K miles ago when I first got it and wear did not remove it. Just a etching color pattern you can see but not feel. Upper end had a ring ridge. Should be able to seat the rings now.

ARP studs saved me a set of head bolts again - this ARP set is paid for now! :agreed:

Vibration damper had 1/4" of rubber coming out on both sides so it went to the dealer for warranty. The serp pulley had moved 1/2" so the rubber on it had also failed. Although it hadn't hit the metal stops yet.

Got a couple hours of work left before I get it smoking Monday.
Click to expand...
I would've blown the thing to kingdom come the third time around allready.:agreed:
I admire your perseverance and the willingness to put a cracked block back in.
 
I would put a slightly cracked block in, but i would do a lock and stich or splayed mains. IMO it would be better than searching for an uncracked block.

Atleast now we have a time line for how long a block might last after cracking.
 
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