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Discussion Starter · #1 ·
I'm thinking wayyyy ahead of myself here, but after reading about quite a few piston failures even on stage 1 cars I started wondering how big of a job it would be to swap in a set of forged pistons. Can it be done without removing the block from the car? Can it be done purely from the bottom of the engine without removing the head? Just curious. . .
 

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Nope.

Pistons/rods are assembled then installed from the top of the engine and pressed down into place onto the crankshaft. The rod caps secure the rods onto the crankshaft and are accessed from the underside of the engine.

Way too much to attempt with the engine in the car.

Proper way is to pull the engine & mount it to an engine stand.
 
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Nope.

Pistons/rods are assembled then installed from the top of the engine and pressed down into place onto the crankshaft. The rod caps secure the rods onto the crankshaft and are accessed from the underside of the engine.

Way too much to attempt with the engine in the car.

Proper way is to pull the engine & mount it to an engine stand.
What he said! It would be much easier to assemble everything on a engine stand than to fight all the constraints of working under a car.
 

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It could be done. I do in frame overhauls all the time. Granted the engines are made with a whole lot more serviceable parts than our engines. Here's one I'm doing now
Engine Auto part Vehicle Automotive engine part Mountain

I was entertaining the thought of if I had to do it I could do it on my car too. I looked and it would be fairly straight forward as long as the cylinder walls are okay. Me personally if I was just going to swap in some forged Pistons and take measurements. I would probably at least try it in chassis first, but as easy as it is to drop the engine out of this car. It's always easier to build an engine outside of the chassis.


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It could be done. I do in frame overhauls all the time. Granted the engines are made with a whole lot more serviceable parts than our engines. Here's one I'm doing now <img src="http://www.focusst.org/forum/attachment.php?attachmentid=98151"/> I was entertaining the thought of if I had to do it I could do it on my car too. I looked and it would be fairly straight forward as long as the cylinder walls are okay. Me personally if I was just going to swap in some forged Pistons and take measurements. I would probably at least try it in chassis first, but as easy as it is to drop the engine out of this car. It's always easier to build an engine outside of the chassis. Sent from my iPhone 6 using Tapatalk.
Is that a maxxforce?
 

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Is that a maxxforce?
Yeah. It's a 2013 Maxxforce DT in a 4300 Chassis. Under warranty cylinders 2&5 slap ass wore out, absolutely no compression, the other 4 were fine. Warranty is only covering replacing those 2 cylinders and the cam.


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Yeah. It's a 2013 Maxxforce DT in a 4300 Chassis. Under warranty cylinders 2&5 slap ass wore out, absolutely no compression, the other 4 were fine. Warranty is only covering replacing those 2 cylinders and the cam. Sent from my iPhone 6 using Tapatalk.
Nice I thought I recognized that motor!! See those quite a bit lol
 

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Old thread but if you were still wondering. Many many dealers will leave the engine in a car to re-ring pistons. Pull the head and pull the pan and go to work.
Is it possible? Totally. Can even hone it in the car.
Yes it will be easier to pull the engine but if space is a factor it's totally do-able. Tons of guys do it.
 
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