Help not sure where to go
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Help not sure where to go Hello everyone new to the forum so apologize in advance if I’m not doing this correctly, anyhow recently purchased a ly6 motor off marketplace for what I believed to be a fair deal at 650, supposedly ran when the previous owner bought it and is a reman motor with under “50k miles” well decided to look into it and found a roller off the one of the lifters in the oil pan, tore the heads off and found the problematic lifter that wouldn’t come up out of the block got them all out and the cam which didn’t show any major signs of problem other then the one lobe with faulty lifter. I guess my question is what causes this to happen and how far should I go to repair it? My intial intent was to just throw a cam and valve springs in it and let er rip but now I will be replacing cam,lifters,trays,headgaskets,springs,trunion kit,oil pump,and most likely push rods. What is worrying me is what are the odds the rod bearings got affected? Also no clue if this thing has compression TIA engine will be going into a 92 rcsb
Been here before, so I can help. What you must focus on here is the cylinder adjacent to the hurt lifter. The lifter bores are positioned right at the bottom of the cylinders, so as the lifter starts to come apart, the hot debris from the lifter gets flung outward by the cam…right at the adjacent cylinder bottom. When the piston is at BDC it picks up this debris and drags it up the cylinder, hurting the cylinder wall. That’s where you need to start. If the lifter is hurt bad enough that it’s stuck in the bore, then there was a decent amount of debris coming off.
Getting that lifter out is tricky. An iron block is forgiving, but not exempt from being damaged more here. You’ll need to tap that lifter out with a punch and hammer…soft taps here, don’t go crazy. At this point, I’d tear it all down to look at bearings…including cam bearings…and that cylinder adjacent to the lifter. Don’t touch that lifter until she’s a bear block, and you can see clearly what your up against. Sometimes the hurt lifter will get stuck down, and the cam won’t come out without force. Take your time here…you don’t want to do more damage than you have to.
If it didn’t run long after the lifter spun, you might be ok. If someone kept it running to limp it home after it crapped the bed, you might not like the outcome. I’ve been here with aluminum blocks, and it’s a touchy deal….much more touchy than iron. Fingers crossed for you sir.
Getting that lifter out is tricky. An iron block is forgiving, but not exempt from being damaged more here. You’ll need to tap that lifter out with a punch and hammer…soft taps here, don’t go crazy. At this point, I’d tear it all down to look at bearings…including cam bearings…and that cylinder adjacent to the lifter. Don’t touch that lifter until she’s a bear block, and you can see clearly what your up against. Sometimes the hurt lifter will get stuck down, and the cam won’t come out without force. Take your time here…you don’t want to do more damage than you have to.
If it didn’t run long after the lifter spun, you might be ok. If someone kept it running to limp it home after it crapped the bed, you might not like the outcome. I’ve been here with aluminum blocks, and it’s a touchy deal….much more touchy than iron. Fingers crossed for you sir.
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So I already got the lifter out it wouldn’t come up through the top so I just pushed it through the bottom, the cylinders looked fine from what I could see I will take a close look at the one with the fault when I get back to it cam bearings looked fine as well, I’m not very experienced with this stuff but the guys helping me say everything looks good the cam didn’t look too tore up but the way I thought it would’ve
You’ll notice it right away. The cylinder adjacent…that piston would have grabbed the steel bits and its skirt will be covered in metal bits that embedded. Hopefully it wasn’t a lot of metal…which it sounds like it wasn’t if the cam looks good, and you dodged a bullet.
