Pieces of steel in cylinder??

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Right.... not as much. FWIW.... Typical levels used to be 1200-1400 PPM. SM, and now SN, grade oils have had the ZDDP level reduced to 800-900 PPM in the lighter weights, or about a 30-35% drop. That drop put high contact pressure flat tappets at high risk. Low contact pressure ones (like with stock cams and springs) seem to survive fairly well still.

And the reductions were actually mandated to reduce the phosporous to protect O2 sensors... the 'P' in ZDDP. The Z had to drop along with the P; there is a fixed relationship between the 2 elements.
 
The better quality of the base stocks (IV and V) offset the lower zddp and P(which is over 900 in the latest ones I've looked at
Latest oils are using a completely different EP package
Do not add ZDDP to SN oils- it can actually reduce EP
 
Well sports fans, I pulled the motor and the plot thickens. I found tiny globules (?) of maybe aluminum on the crank. Almost looks like welding slag, but that doesn’t make sense. Non-magnetic.

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Maybe that crap sold on the interwebs that is for "welding" with low heat.... ? Stuff looks like brazing rod for aluminum but you can use a propane torch....
 
cam bearings are usually Babbitt except for the HP versions and Mains and rods can have a Babbitt overlay or the Top Fuel bearings are Babbitt to better take the pounding
(they may be using something else now it was Babbitt back in the day...)
about that motor mount
 
The seat would hula hoop on the valve and would need to break apart to leave the valve and begin its crushing between the pistons and head. Now if it hung to one side the piston 'could' then hit the valve and seat and at that point it would also crack apart. Yes it can go through the intake into the other cylinders, I lost a piston if you all remember and it went into all other cylinders by means of the intake manifold.

I noticed the sunk valve and thought along the same as George.
 
Dang.. looks very much like blobs of solder. See if you can easily crush them with a screwdriver.... No I would have no idea why solder would be in there! The only place to possibly use a solder is to fix the oil pickup.

Just saw the crank hole filled.... dang x2!
 
Any holes in the oil pickup screen RightyTighty ?

Boy that should be bearing material, Oil filter should have caught anything that came through the oil pickup.
 
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