So last Friday I was driving to get some dinner and my SDV decided to stall right as I was making a left across a large street. I managed to start it up and put out of harms way into a parking lot where I was unable to turn the motor over anymore. It has 140k on it (from what I know) and was running fine until this day. I didn't hear anything (actually I didn't even notice it stalled out until I saw the oil light on since the ignition was on and not running).
1hr later and the tow truck was there and dropped it off at my shop. After checking all the normal stuff (spark, fuel etc..) i pulled the #1 spark plug and when it came out, the head was smashed flat. () I pulled the left side valve cover and found that the 2nd valve was stuck down and i was able to wiggle the rocker. ()
When I removed the piece that holds the rockers down the 1st valve was sticking up much higher than all the others. so i figured the next step was to pull the head to see whats going on.
So after unbolting everything from the top and pulling the intake manifold, I got the awesome view of push-rods that are supposed to be straight and now the #2 pushrod looks like the letter "S". Good news huh! Well then, exhaust manifold comes off, and head is unbolted, once I wrestle the heavy "sob" out of there I see that the head of the #2 valve is sitting on the piston head. (GREAT) after feeling around the cylinder walls to feel for gouges, and feeling nothing i go to grab the valve head, well it seems as if it is pressed into the piston head. with a little force and wiggle, it popped out and now i have a huge hole in the #1 piston. not a good thing.
So I figured, the local Vintage Cadillac parts store, has a "good running" 500 motor that I can purchase and put in there. He said i would need to change the oil pan and oil pump, and it would bolt right over.
My questions are:
Would that be all I need to do? (as far as getting new parts) I know id replace the normal stuff while the motor is out but i dont know if i would need anything to do the swap.
Also are the exhaust manifolds the same or will i have to change them too?
Will i still be able to bolt the factory a/c compressor back in to the same location?
This is going to be my first motor swap and I have knowledgeable mechanics to help, just not Cadillac guys. So any help would be appreciated.
I also want to keep the 472 that comes out, and slowly build it in my garage and then replace it when that one is finished. Maybe build it up with a nice cam and nice heads. That is for the future though
Here is the only picture I have of the damage so far and its from my iPhone so its not the best quality.