Yeah I've seen those, but to get one is a little pricey where I'm at. I don't think anyone has them in stock, so on top of the price, you get charged oversize freight. All the stores here have cheapo chinese stuff. Hell even my new craftsman 4 ton jack is chinese, that's really sad.
So I tore apart the motor some more and found out that some of my hydraulic lifters were crudded up and had no give to them any more. I don't know how many, but we confirmed two and believe several other though we haven't checked them all. It looks like my valve seats have been eroded, but not as bad as I first thought. I have lost the valve margin on most of the valves on the passenger side, and their erosion contributed to the seats. Being Intake valves I guess the metal was sucked into to bore causing the bore damage. That's my conclusion. Anyone else think I'm on the right track. I will post pictures as I can.
Heads don't look that bad, except the seats will have to be replaced, but it may be deceptive. That slap in #5 piston is what scares me. But yeah everything is gonna get checked and replaced. I guess if the lifters weren't delivering oil through the push rods to the rockers that I should probably replace all the lifters pushrods, rockers, and neccessary valves. I haven't had much time to get this all done since I started my new job. I can work on the engine or take pictures, so I guess I need to stop and take a few pictures. Anyone know a good source of valvetrain parts? All the master kits for this engine don't include valvetrain parts. I think the lifters clogged from the engine dusting. The oil pan has a gritty residue.
could the residue still be why my lifters clogged? Also would lack of lubrication of the valve cause the them to erode, or is it the dusting that caused the erosion over time. On second thought I have a hard time believing the dusting itself caused the erosion since it happened only on the passenger cylinders (so far as i can tell). Just trying to narrow down what happened so that I won't overlook anything on the rebuild. I don't want to do this twice.
We managed to pull pistons 5 and 7 earlier and it looks like the top compression ring was mostly gone (small pieces in the grooves) on both pistons and the oil control ring was partially gone on 5. Hopefully Chad will be on later tonight with some pictures.
Charles
Last edited by KD5TKR; 12-08-2008 at 09:48 PM.
Reason: Spelling, eh?
If you want, i can send you some rockers and push rods from my blown engine, on the cylinder that isn't blown. 15 of the rockers are fine, one is cracked in half, but i *believe* the push rods are fine. You shouldnt need them unless they dont roll true. Let me know, i have no use for them.
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More pictures. Found bits of rings in the oil pickup, and amazingly, some left in the grooves. Valve seats will need to be addressed, but valves will need to be replaced. The pictures of the piston are from #5, and #7 is similar. Have fun and comments are welcome. As usual the story and full size pics are here.
the video I posted in the other thread I started, just in case someone hasn't seen it. Anyone tell me the failure that happened, so I can make sure I don't do this twice? As mentioned earlier, some lifters are clogged and not moving. The parts you see are not the only damage, but everything else looks similar.
So do you think the ring came out to the top side of the piston causing all the damage? or something ingested down intake? Maybe the air intake heater? Those look to be some very sporatic dents in the top of the piston. It definately got beat around some before making an exit.
Rings came apart and hosed the piston tops. Pretty sure about that. I'm sure the pistons/bores got it from dusting. Just wondering if the valve train is directly related to dusting or if it is a cascade failure. Ya know, once the pistons/rings went, the trash jacked up lifters, lack of oil jacked up cooling on valves and toasted them. Anyone?
I would not mess with that motor. Sell what you can, and find yourself a nice donor engine. It will have to come down to the complete bare block, remove all the parts, hot tank it to remove the junk, and magnaflux the heads and block to see if it's even worth reusing. With those particles floating around in the cylinders, i bet the head decks are cracked between the valves, that is common.
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Think the rings and pistons are hard enough to cause head damage? Thought they would be softer and the head would be hard enough that the ring bits and pistons would take the damage. But everything will get checked. I know now I will need to check for cracks. This teardown won't be built back up in the short future, this is just to see how bad the damage is, and how much money it will cost me.
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