Valves possibly hitting piston after timing chain replacement?

2004 DODGE RAM
200,000 MILES • 3.7L • V6 • 2WD • AUTOMATIC
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DODGEDUMMY39
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Has the heads redone the mechanics messed up and forgot to tighten one of the cam sprockets and in result caused it to jump timing. I redid my timing with all new sprockets chains and gears all new now everything lined up like supposed to be. Now when I turn the motor by hand, I get about a half of turn them it stops like something is hitting the piston. How do I get the cam right without having to pull it all back out? it's still down to the chains I haven't put the covers or anything back on i think it's the driver's side cam that's off due to that being the one that was not tightened to spec. How can I fix this?
Oct 30, 2023 at 12:02 PM
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STRAILER
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Was the engine running when it jumped time? If so some of the valves have contacted the pistons and have bent or broken the valve which will cause the engine no to be turned over by hand. You can tell if someone is wrong by looking at the height of the valve head (spring/retainer) when the camshaft lobe is not lifting if you have extended valve lash that is the cylinder having an issue, you might need to remove the cylinder heads for inspection. There is a procedure to aligning the timing chain marks which I have included in the images below. Please let us know how it goes.
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Oct 30, 2023 at 3:05 PM
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DODGEDUMMY39
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I believe it was running when it jumped but I was still able to rotate the engine by hand this just became an issue after I put the new timing in everything was perfect except for the cam on the driver's side was one click to far I don't quite remember if I TDC it on exhaust but I did TDC it so should I pull it all back out re TDC on exhaust and go from there.
Oct 30, 2023 at 4:28 PM
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DODGEDUMMY39
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I take the chain off the cam and control it over but when I put a chain on, I only get maybe half around stumped as to what to do hopefully y'all can help me.
Oct 30, 2023 at 9:30 PM
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STRAILER
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I would not turn the engine over without being in time, this can cause the valves to contact the pistons. I would put the chain back on with the marks lined up and then crank the engine over using the starter and see how it sounds, this can help us see if all cylinders have compression. You can upload a short video of the engine cranking, that way I can see if the engine is hurt or not.
Oct 31, 2023 at 9:47 AM