That's my thought too, I did throw some MMO in the oil and drove it liberally for awhile just to see if that would change it at all and it didn't. Stock exhaust. It was hard to see the top of the manifold when looking for bubbles so I used that ebay endoscope but it was still hard to see. I think I'...

Car's running great but I have this loud ticking sound which I'm 99.9% sure is not lifters (they quieted down after the first drive). Sounds like it's coming from the exhaust side of the engine. Here is a video of it. It is the higher pitched tick not the rumble-esque sound, although I think their r...

Ok, head back on the block and all cylinders between 5-10% leak! Lovely! So it was definitely either poorly seating valves or stuck lifters. Either way, I'm solid. Hope to get it all back together and on the road in the next day or so. And with those numbers I'm not at all regretting that I didn't r...

https://i.imgur.com/S2RhVZr.jpg I decided to disassemble/clean them. When reassembled, they all spring back easily since I didn't pre-fill them (but I did test the check valve). I'll submerge them in oil and pump the piston until all of the air escapes which will leave the one-way interior chamber ...

Looks like bad lifters don't necessarily need to be replaced as long as the top is still flat and can be cleaned out to work like new, so I think I'll do that. But is there an issue with running bad lifters? I suppose if the lifter piston is stuck 'out' rather than stuck 'in' it could be keeping the...

What's the good word on reinstalling 'bad' lifters? I could cruise the JY for replacements but they'll probably cost more than I want to spend. Is ticking the only symptom or would it actually effect the valve operation? Edit* I need some clarification here. I always though that lifters should have ...

All five cylinders had pretty significant pitting. They each look pretty close to this one:

I tried soaking them in brake cleaner, wd-40, and gasoline with no noticeable results. 2 mins with a brass wheel and they shined right up. I put one in my angle grinder, flipped it upside-down on the side of my front step, and held the power button with my foot which also kept it in place. Then I pu...

Brass wire wheels were the business to clean the valves. Scraped the pistons with an old credit card and used the wire wheels too. They were super nasty and pretty heavy pitting underneath all that carbon, not exactly sure why. Valves lapped and I think they all look good. I'm on hold until I get my...

Yes, lifters are hydraulic. I did label them but I don't think it really matters which ones go where. I'm reading up on cleaning pistons/valves/head. Last engine I rebuilt I sent the head to a machine shop but I don't want to do that this time and its pistons/valves weren't as bad as these. Any reco...