elbeee964

unabridged version

J richard

Well on a positive note it's only the left half...

Did it fire on a good cyl or was the damage under cranking? If only under cranking the damage could be minimal, three valves, rockers, lap and you're back in business...

LouZ

Heard the "POP" on cranking. Will be pulling the head off to check valves.

altarchsa

Hi Indy. Don't you agree with me? I once bent a valve just by turning the engine by hand when I had not gotten the cam aligned correctly. When the valve head touched the piston, it hit the edge of the head and easily bent the shaft.

If the entire bank was out of time and the engine was started, valves could be slammed back into the rockers by the pistons and those rockers would let go.

Indycam

I was trying to agree with you , sorry if it came out wrong .
You went for pistons kissing the valves and so did I .

altarchsa

I kinda thought so. I just wanted to confirm because I've found you to be one of most knowledgeable on here.

race911

Don't know. I was always on the "shop" side of the equation. Or a buyer for a dead car.

KaiB

I now absolutely agree - was not thinking.

LouZ

Well, replaced the rockers and just did a leakdown to see if any valves were bent...... Can't tell!!!

The air is blowing past all 6 cylinders right into the crankcase! Time for some new rings (among other things). So off comes the whole top end for rings, check all valves and replace as needed, install new guides on the newly machined heads, and..., and..., and...$$$$$

For those of you who want to know, we didn't even bother to record the leakdown numbers, suffice it to say, 50% was the good one. Yea, they knew that the engine was cold, and the oil's been out for weeks, but with those values, it wouldn't improve to 95%.