mo bearing wear

dual purpose bench

2 2 many

Im thinking the dark spot may be caused by the oil pump stud?



http://i19.photobucket.com/albums/b1...ps36a094b5.jpg


http://i19.photobucket.com/albums/b1...ps2b610fa3.jpg

I t looks like that the journal has some bearing transfer


http://i19.photobucket.com/albums/b1...ps20deadb9.jpg

These are 2007 builds,about 4 summers. Im trying to figure up the hours from notes,

What do you all think? little trash

click on pick to zoom in

http://i19.photobucket.com/albums/b1...ps0264f160.jpg
http://i19.photobucket.com/albums/b1...ps8c2d129b.jpg
http://i19.photobucket.com/albums/b1...psf685a42b.jpg
http://i19.photobucket.com/albums/b1...ps5e5c258b.jpg
http://i19.photobucket.com/albums/b1...psc180e556.jpg
http://i19.photobucket.com/albums/b1...ps6e36f455.jpg
http://i19.photobucket.com/albums/b1...ps40817b20.jpg
http://i19.photobucket.com/albums/b1...ps435e1c45.jpg

Those look a little bit like mine, but mine had only 30 hours on them, as opposed to 4 summers. :picard1: That rear main looks a little bit like it had a hot spot in that dark area. Yes, it does look like there might have been some small particles that got through there, and some wear. Maybe a little fuel dilution on a supercharged application?

I had sent my rings back to Total Seal, They said there is a little signs of fuel wash,which I know the motor is real rich,little detonation on the bottom of the ring cupping which I know I'm on the edge,and they are close to needing replaced,The molly looked good,Keith said that they look about normal for a marine blown engine at this power level with this many hours.He did recommend a diff ring that has a better stronger top ring.He did say make sure tofollow the bore and honing directions that Dart provided to get a good ring seal.

CT9190-255 TNT 1/16 4.500

Ring gaps are good not showing any butting and the leak down was still good The puke tank on this motor just had a little oil mist in it,so blowby wasn't bad even though how loose it was.


I been cleaning up the old block and all the other parts,going to sell.

Block w/ JE pistons 4.530 gen 6
2 sets Crane tappets
manley push rods
2 sets guide plates
2 sets comp 929springs
2 sets retainer comp w/ loc
2 sets manley valves
Crane rocker arms
2 sets rocker arm studs
4 oilpumps w/ meling/mporoso pick up
2 sets arp head bolts
I've pulled the rods apart and the rod bearings are showing a good bit of wear, to me at least,Ill post some picks.

I polished the cam and most of the tracking/marking came out,

Rob




.

starboard rod bearings

What do you all think?