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Piston installation

Tiny
LL-MARK1-LL
  • MEMBER
  • 2002 CHEVROLET SUBURBAN
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 115,000 MILES
I'm trying to do a junkyard project with LM7 engine. I assembled the piston and the rods without marking the numbers on them but I still know which one is right side and left side. My question is, can I put them in any order? If that's not possible what is my option? Because if I need to buy a new one do I need also to buy a new crank shaft?By the way I'm trying to add a small Turbo and 50-100shot Nitrous. Not too crazy ^_^.
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Monday, August 31st, 2020 AT 3:58 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

You are entering the world of high performance with a turbo and nitrous.

In order to do that, you need to replace the crank, rods and pistons with steel construction due to the high amount of pressure from the turbo alone.

That will require stripping to a bare block and having it bored out and fitted with new pistons, steel rods and a steel crank.

Right now, you have cast iron crank and rods. If you leave them in, the crank will snap in half and the rods will bend and most likely take out the block as well.

Roy
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Monday, August 31st, 2020 AT 4:09 AM
Tiny
LL-MARK1-LL
  • MEMBER
  • 1 POST
Didn't answer the question about the piston installation.
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Friday, September 11th, 2020 AT 1:34 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Hello, I can give more information this video shows the engine being disabled and it tells how the pistons are numbered and how to tell where they go:

https://youtu.be/RvBYxpRC464

Please run down this guide and report back.
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Friday, September 11th, 2020 AT 1:36 PM

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