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Inspect Connecting Rods and Pistons

27:30
48:11
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At 27:30 in

LSXcalade Returns: Late Model Engines Tears Down The 427 & Explains EVERYTHING (LSX Engine Tech!)

What happens here

The connecting rod caps are unbolted and removed from the crankshaft journals. The rod bearings are then extracted and meticulously inspected for any signs of unusual wear, scoring, or material degradation. Similarly, the pistons are removed from the cylinders and examined, focusing on the skirt condition, ring lands, and overall dimensional integrity. The team discusses the importance of ensuring sufficient piston-to-wall clearance and notes that minor scuffing on the pistons is typical for a high-horsepower engine (1700 wheel horsepower). While the current pistons show normal wear, excessive wear might necessitate replacing them with larger ones to maintain proper clearances.

Goal: Assess the condition of connecting rods, bearings, and pistons for reuse or replacement.

Tools and materials

  • Air Engraver — To mark components for reassembly, if needed
  • Connecting Rod Bearings — Friction-reducing inserts for the connecting rods
  • Connecting Rod Caps — Components holding the connecting rods to the crankshaft
  • Flashlight — To illuminate piston skirts and ring lands for detailed inspection
  • Pistons — Components that move within the cylinders
  • Shop Rag — To clean components for inspection
  • Sockets — Used with the torque wrench for bolts
  • Torque Wrench — Removing and installing connecting rod cap bolts

What they say

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anyway back to the video theoretically light up faster and have more nut when you're you know don't have the boost controller on and that kind of stuff just like we're measuring the chamber volume of the cylinder head we can do that to the piston as well and actually we'll clean all the carbon out of it and we'll know exactly what that volume is so they've right in the cylinder number on there just numbering the number in their eyes i always wonder what tool made those little things yeah it's a little air engraver piston it looks like it's wearing pretty well so that contact patch right there is pretty you know is normal and looks good i mean you got a little stuffing but that's kind of nature of the beast you know 1700 rear wheel they're gonna they're gonna have some wear on them ultimately uh but that looks that looks promising um the bearing there's there's a little scuffing there uh from you know you could say that maybe a little lacquer lack of oil but it's not definitely not wiped out it looks actually pretty clean like a lot of times you'll see these bearings are like a tri-metal bearing like this it's a very soft fabric material on the face so that allows uh foreign material to get embedded they call it the inventability of the bearing and that allows the material to be embedded into the face of the bearing and not stay on the surface so it kind of just like heats them keeps that debris up and keeps on going whereas a factory bearing like today's factory bearings are a harder an aluminum bearing yeah and it's not as soft as this babies material so you know all of your like h series racing bearings are a babbitt which has better embed ability so but you'll see like if there's a lot of trash run through the engine you'll see like a bunch of speckles um you don't see that here uh maybe a little bit of lack of oil like we were talking about uh from the from the scuffing there but all in all pretty decent here's the here's the uh the half end so this this is seeing all of the uh cylinder pressure you know the rod side uh the beam side is seeing all the cylinder pressure where this is kind of seeing your you know the uh when the piston is coming back down catching it from going through the head yeah exactly so all in all not too bad there and this is the one where you had the head gasket issue right yeah obviously because it's you know clean clean um but uh then as far as the rings go second ring is wearing well it's a it's a tapered ring so you'll see…

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