Rod bearing wear question

[SVOFANATIC]

What is it that causes the rod bearings in cyl 4 to wear so much faster than the other bearings? On both the engines Ive pulled bearings from cyl 4's bearings were far far worse. I was under the impression that cyl 1 should be the most worn since it is the most unsupported and farthest from the tranny. Can anyone explain to me why this is?

 

[rubydist]

usually, its #5 or #2, in all the engines and photos I've seen, that is the worst. it has to do with the oil flow path through the crank and also the bearing clearances on the various bearings, imho.

 

[hawkeye18]

#5 was the worst in the '95 when I took them out at 202,000 miles.

 

[frosho]

IIRC, Ernie's oil starvation issues were always with #5 in his salt flats car.

 

[SVOFANATIC]

Maybe I have my cyls mixed up then. Rear bank crank side is #1 then front bank is 2, rear bank odd # cyls, front even #'s?

 

[mavericksav]

I saw 3 time #1 cylinder (one of them was at ex-my 92 SHO). All time the problem was the dirt in oil magistral (line)

 

[mavericksav]

I think there isn't any regularity in this problem

 

[rbruso]

Maybe I have my cyls mixed up then. Rear bank crank side is #1 then front bank is 2, rear bank odd # cyls, front even #'s?

Back bank: 1 2 3
Front Bank: 4 5 6

 

[SVOFANATIC]

ok yes then it is cyl 5 that has been having the issues. my bad.

 

[rubydist]

Maybe I have my cyls mixed up then. Rear bank crank side is #1 then front bank is 2, rear bank odd # cyls, front even #'s?

Ford's system of numbering cylinders is consistent throughout the line - the cylinder furthest from the flywheel is #1, and then it increases as you go down that bank. Then the other bank is numbered starting again on the end furthest from the flywheel.

That is how the V6 are 123 down the right bank and 456 down the left bank and the V8 are 1234 down the right bank and 5678 down the left bank.