2002 engine rebuild
#41
Could this be the cause of the engine failure?
This looks like either improper casting- as in the casting for the cylinder didn't extend far enough down into the block, or part of the block cracked and fell off. I wouldn't worry so much about it, but when I pass my finger over it, I can feel how rough it is on the cylinder wall. The piston extends below this at BDC, so it definitely came into contact with the defect. This was on cylinder 6, which was the piston that was scuffed the worst. I think this might have been there for quite a long time and may have been the source of metal that went through the engine. Look at the 6 - 7 o'clock position at the bottom of the cylinder bore:
#42
#2 Main bearing, looks like a lateral crack:
#6 cylinder from the top:
#8 cylinder from the top:
#5 Main/Thrust bearing:
Timing cover shows no signs of timing chain contact:
The block is on the way to the machine shop:
#6 cylinder from the top:
#8 cylinder from the top:
#5 Main/Thrust bearing:
Timing cover shows no signs of timing chain contact:
The block is on the way to the machine shop:
#44
Finally found the source of all the metal that destroyed the bearings
OUCH!!! Not good. Passenger side head. This is what happens when the cam retainer bridge gets loose. The cam eats the bridge and the head.
Lots of metal from the head and bridge.
Cam boss/bridge. Camshaft ate it after the retainer bolts came loose and the bridge cracked.
Not pretty. Not pretty at all.
Notice the oil feed hole on the journal at the far left is completely closed off by metal.
More oil feeds wiped out.
Far left, journal #1, is what they should look like.
Passenger cam showing bad wear at the cam journals and evidence of contact with the cam bridge.
Lots of metal from the head and bridge.
Cam boss/bridge. Camshaft ate it after the retainer bolts came loose and the bridge cracked.
Not pretty. Not pretty at all.
Notice the oil feed hole on the journal at the far left is completely closed off by metal.
More oil feeds wiped out.
Far left, journal #1, is what they should look like.
Passenger cam showing bad wear at the cam journals and evidence of contact with the cam bridge.
#46
Well look at it this way...You get a whole bunch of new parts and can build it your way. Nothing like good carnage posts.
I would deburr all areas in that block it looks a mess especially under #6. I agree that looks like a casting issue on the block. I don't think it went thru the engine as it would have shown up with it's destruction much earlier than now.
Good luck with the build.
I would deburr all areas in that block it looks a mess especially under #6. I agree that looks like a casting issue on the block. I don't think it went thru the engine as it would have shown up with it's destruction much earlier than now.
Good luck with the build.
#47
Machine shop is going to chamfer the bottom of 6 to eliminate that issue. He is buying brand new heads, so these will get recycled at the junk yard. Crank is going to get polished. Not sure yet if we'll need under size main/rod bearings.
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#49
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Last edited by VTX1800N1; 07-02-2014 at 10:17 PM.
#50
Looks like LMR has a SPEC lightweight aluminum flywheel and Stage I clutch on sale. More parts soon to be on the way....
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Last edited by VTX1800N1; 07-04-2014 at 07:58 AM.