Locks also come in many different styles for different valve manufacturers. A mismatch would also be a big no no.
Agreed, sounds like it will need to come out. Probably piston damage. Definitely valve damage, probably valve seat and valve guide damage.I'm a pessimist by nature, so I'm prepared to expect the worst. That's means that I'm prepared for and expecting the whole motor to be toast. Anything short of that is a victory and I'll consider it good news. I can't see how I don't have piston damage or a bent valve. Any piston damage and the whole engine has to come out for inspection, cleaning, and repair. I spotted a 3/16" long bit of debris from the keeper sitting on top of the head, so there's probably more in the pan. Prudently, the whole engine probably needs to come out.
After seeing how it blew out so soon afterwards, in retrospect I too would have expecting it to fail on the trip home.I was expecting to read something bad happened when you made the trip north to get back home.
I bought a pair for $25 total, shipping included. Gave one away I think.Gordo, I picked up an inexpensive Bosch boroscope camera for under $40 a few weeks ago.
I have one that connects to a phone or tablet via WiFi and an app. Has some LED lights that have 3 output settings. I've been meaning to use it to inspect parts of the GT.But mine you had to plug into a cell phone or computer the way you would a webcam, had no screen of its own.
I’d be a little nervous right now if I got an Opel engine from that shop. Not an area that “close enough” will work.I talked with Charlie and he thinks one of the locks or "keepers" may not have been fully seated or the shop who assembled the head used a too large keeper. He said there are 2 sizes, something like 5/16" and 9/32", and they may have put the wrong size on. Bottom line: All the rockers and such need to come off to inspect their condition. But that's not the worst of it. Without that lock/keeper there was nothing pulling the valve back into the head. The rocker would push it down, but nothing was able to pull it back into the head to seal the combustion chamber, hence, ZERO compression. That valve was basically open all the time. But I said the worst of it, didn't I? Without anything pulling it back into the head the valve could just keep dropping down.........and hit the piston as it goes up and down.
We'll see what the scope shows
I'm not optimistic.
The valve wasn't hanging up, the keeper/lock became disconnected from the valve, so there was nothing to pull the valve back up after the rocker pushed it down. So, then the valve, which would then stick down farther than it normally goes, was getting hit by the piston and shoved upwards. The valves are at an angle relative to the piston, so that valve got bent by the impact. We're virtually certain that the machine shop F'd up and put the wrong size keeper on that valve and maybe others. Apparently his machine shop did this goof before, but he caught it before it went to a customer. I would have to remove all the springs/caps/keepers and inspect them, but since that valve is bent it should go back to the shop. We'll probably put a different head on the engine.NOW why was that one hanging up? is the question
It's a low mileage factory replacement engine with it's original pistons, just the valves have been made bigger with Chevy ones. It was suggested to me to just try to sand/grind the gouging smoothish. This sounds like a rig job to me. What if the piston is cracked or something where the impacts were? Yeah, I would tape off all the openings in the block and try to git'er done in the car, but it seems better to me to at least remove the piston to do that job and give it an inspection. There may be piston particles down in the rings. Since Charlie has bunches of 2.4 pistons, it would seem prudent to just pick a good one, put some new rings on it, and swap out the damaged one. I guess it boils down to a judgement call on my part as to how nuclear I want to go.I don’t think it’s as easy as just putting in a new piston. The cylinders are usually machined for each piston. Those look like stock 2.4 pistons…but may be oversized? I don’t know if I feel like that piston is damaged enough that I would worry about it, but just clean it up and maybe polish the cutting on it