Visit to machine shop
So, I'm about to drop off my engine block at the machine shop for some work. This is my first rebuild, and I want to make sure I give them everything they need to do this correctly. I'd like to get some feedback on my service to do list. Please feel free to respond with other information I should consider including. This is an I6 4.0, completely stock. Note: I have already measured cylinder bores for out of round and taper (they are outside of specifications), but I still want the shop to double check my measurements. Here is what I plan on giving them:
- Hot tank
- magnaflux the block
- Check the deck for flatness
- Check the cylinders for out of round and taper
- Rebore 0.03" over and hone for cast iron rings (Mahle 51870CP.030 Piston Ring Set)
- Install new camshaft bearings
- Remove rods from old pistons
- Attach old rods to new pistons (Silv-o-lite 3241HC.030)
Last edited by ThomasXJ; Mar 16, 2025 at 03:36 PM.
The head is at the shop now getting valve work done. Crank comes next. But, I didn't know about rebalancing after changing pistons. Thanks!
Seasoned Member

Joined: Jun 2021
Posts: 447
Likes: 162
From: Ortonville, mi
Year: 97
Model: Cherokee (XJ)
Engine: 4.0
Let them install the cam bearings.If you're not a mechanical guy this is a no no for you to do yourself. You are having the head checked/ cut for flatness I assume?
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