Wow, you're doing all the work yourself? You must be a talented lifeguard! And your old man must not mind you joining these sketchy forums where all the LR weirdos hang out! 
Posts by DiscoJimmy
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This was challenging, but it is done and we are reassembling. Of course, we found more broken stuff along the way. Starter mounting ear was snapped off. Right side motor mount torn. Just add $$$! I'm debating that while I have the pan off, we check big end clearances while we wait for parts. This is great fun on your back under the truck! A few notes on this process. (we used the PDF that is running around out there to get an idea of where to start..Thanks for whoever did that!) We used 1/4-28 stainless set screws that we ground flat and a jam nut, and red permanent Loctite. We measured about 0.3 inch thickness after the holes were drilled, so that leaves about 8 threads in the block/liner. After setting the screw depth by feel, we went in with an inspection camera to check for protrusion. Then, we greased the area and turned the engine 1 revolution and re-checked that there was still grease in the hole area. The inspection camera, I think, is an absolute must if you do this! (BTW, we replaced the camshaft, not the crankshaft!) If this doesn't cure the noise, it has to be a valve guide or valve seat. We checked for exhaust in the coolant, and it is clear. Compression is good and leakdown is OK. Sheesh, is it all worth it?!
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Weather and time finally aligned and we got it back together. We started it and we heard noises that we had not heard before. Realizing it was kind of cold and we were running 20W-50, we anxiously awaited the magic temperature of about 135. It came and went. the engine quieted down considerably. No tapping! Success! Test drive also succesful! (after a return to base to tighten lug nuts- we painted the wheels while we had it apart and forgot to tighten them!) So, we're going to run a tank of gas through it and change the oil to 10W40 and drive the dang thing!
Roger that! We had 20W to troubleshoot. The thought was if it quieted down, it was a valve train issue, not a slipped liner. Result was inconclusive. We were desperate! We'll probably go with 15W/40 Rotella.
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