Hello I will help you with your question,
It sounds like the timing chain has slipped and the valves are bent.
You will need to pull the valve cover to check on the chain and run a compression check if you find the chains in place.
Let me know how much of the work you can do yourself, to pull the timing cover is an all day job at a shop.
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how do uoy pull the engine through the top.
I don't think there is a way to remove the engine from the top without removing the transmission from the bottom first. This was designed to come out the bottom with a powertrain lift. You could place the engine/subframe on stands and raise the vehicle up off it with a 2 post hoist but then you would need a 2 post hoist.
The procedure to remove it is below, sorry but this is the only way I have ever done this
Click here for procedure
Please let me know how I can help you with this