2004 Pontiac Grand Prix GTP Comp G Supercharged Series III and I spun a bearing and all my parts are good except the block and the pistons /rings they are shot. I was wondering if I bought a non supercharged 3.8 Series III (low miles) and used only the block and pistons and cam and replace the other parts with my parts would this work?
Have you built engines before? Not mocking, serious question. Because you need to really, really know what you are looking at to do a mix and match build and make it work correctly.
The easier and cheaper option would be finding another supercharged 3800 and doing a full replacement. You rebuild it and miss one little damaged component or something, you wind up having to tear it down again.
I've got the basic skills I'm not a master. I've done 2 other engines before with help. I've read topics in other places that say yes you can but only the block and then other people say no you can't so I'm kind of lost. I read a topic in Motor Trend about the Series II that said yes the blocks are interchangeable as long as you use the heads made for the supercharger. I've read so many different things I just figured ask someone and why not ask Scotty since I watch tons of his videos. And if anyone can get me in the direction of getting my girl back on the road I'm open to all help.
Mod_Man by no means do I take it as mocking perfectly respectable question.
Ok well that's good. Some people don't like being asked about their skill set, but when you get into engines it is more than changing the oil as you know. You CAN use the block as they are interchangeable. You do need the heads for the supercharged engine. The reason is the supercharged 3800 uses different heads than the standard 3800. It makes a little less compression, which is what you want in a boosted application. If you can find quality parts to use (there are a LOT of 3800 series parts in junkyards, etc. so it shouldn't be an issue), it is possible to rebuild the motor and reuse just the block itself. Of course, realize it sounds easy to type that but it will be a lot of work to assemble everything and get the tolerances correct. Even guys who build engines all the time make mistakes here and there, so if you decide to tackle it be sure to take your time. You will likely find out that you can get a replacement engine cheaper than rebuilding what you have, plus that is a lot easier to do than a rebuild. But that depends on what you want to do. If I were in your shoes, I would get my parts list together, figure out how much it will cost to purchase everything needed for a rebuild, get a price on a used engine, and then do the math to see which is the better option. Good luck with whichever way you decide to go though.
Thank you Sir!