Need help with this.i have a 03 Dakota 4.7. I had tore my engine apart to change out the headgasket. Then saw a bad piston..how much would it cost to replace it an do it myself an should I do it or just sale the truck..o yeah same thing with my 06 ram 1500

 

You like blowing holes in pistons?

How bad is the piston? Then again, it likely doesn't matter, no matter how you look at it, you are going to need to tear the engine down completely, and thoroughly clean it. That will also tell you what parts you are going to need....... It ain't gonna be cheap, and it ain't gonna be easy. If you haven't rebuilt an engine before, I think you would be further ahead just finding a replacement motor, and dropping it in there. Bear in mind, the 4.7 went thru a LOT of changes over the years, and they are NOT all interchangeable.

 

No sir I do not like to blow Pistons LOL I had bought that Dodge Ram real cheap because of that today I'm about to pull a motor out the Pistons am I Dakota pretty bad I'll see if I can put some pictures up right now is raining pretty bad so I'm going to have to wait to see if the rain will stop

 

Wow. That's bad...... Why so much rust on the cylinder walls? Has the engine been open for a while?

 

Looks like it was ran lean and/or low on crankcase oil and/or with a plenum oil leak for a long time, leading to hot cylinders, detonation, and ultimately mechanical failure.

 

Ok I got the block out.now question .should I just replace that one or all of them.plus should I get them on Amazon or on eBay if not where would be a good place. To get them.

 

Think I would go thru the whole motor.......

 

I think I'd go a bit further than that. That's a pretty hefty chunk of metal missing from the deck in that picture of the bad piston. If it were me, I'd not trust that block.