help on lm7 block
Thread Starter
Staging Lane
Joined: Oct 2013
Posts: 77
Likes: 0
help on lm7 block just got the 862 heads off and noticed there was water in a couple of the cylinders and now theres rust... looks like its gonna have to be boared.. where can i get a set of pistons and use stock internals? this was supposed to be a budget build.
Minor surface rust won't kill an engine, see if you can wipe the rust off with brake cleaner..
And how much water?
Could be when you pulled the heads some of the coolant went in
Post some pics
On The Tree
Joined: Oct 2010
Posts: 175
Likes: 4
From: PHX, AZ
Agreed, and to expand on your original question, look into some "Junkyard Dog" pistons from WISECO. They are forged units and will work with the stock connecting rods .945" wrist pins.
Thread Starter
Staging Lane
Joined: Oct 2013
Posts: 77
Likes: 0
motor has been out in my shop for 3 months.... i bought it off craigslist. No telling how long they had it out. I will try the pic thing
Thread Starter
Staging Lane
Joined: Oct 2013
Posts: 77
Likes: 0
tried to clean. sligthly pitted. If i bore to 3.950 any idea what piston i can use with my stock internals?
Thread Starter
Staging Lane
Joined: Oct 2013
Posts: 77
Likes: 0
any part #s or links to for pistons? Im new to the ls world, dont know much about them, trying to learn. could i use a ls6 piston with my stock internals?
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Look at either Wiseco or Mahle. They should have a piston with the right diameter and compression height that will fit the stock wrist pin. Bore and hone should be around $250 and another $200ish to balance rotating assembly. Before that though I would try a ball hone and see if it cleans up them check your piston to cylinder wall clearance and see if you could still use them being it is a budget build. I was in your shoes a few months ago but just bit the bullet and went ahead and bored it out.
