1G Need to replace piston, need some insight

[Chaoticdopey]

ok well i need to replace the piston in cylinder #1 as i dropped a valve, when i unhook the rod, do i have to put new rod bearings or just leave the original in? and what if the bearing moves, will that affect anything when i put it back together, im ordering just 1 Ross 8.3:1 piston as the rest looks fine and i got a new head with evo 8 springs and retainers so i shouldnt worry about valve float anymore... i just want my car to run again.

 

[donniekak]

You are going to have to hone that cylinder for new rings and match the piston weight to your other three.

From what I've seen single pistons are sold much heavier than matched sets. This is so you only have to remove weight from one piston instead of three.

 

[Chaoticdopey]

You are going to have to hone that cylinder for new rings and match the piston weight to your other three.

From what I've seen single pistons are sold much heavier than matched sets. This is so you only have to remove weight from one piston instead of three.

so i might as well just get a full set of Ross pistons then? and hone all 4 cylinders? what about the bearings

 

[motomattx]

Not necessarily, if you can still see the weight marked on the bottoms of the pistons or if you have the original sheet that came with the pistons, but yes on the new rod bearings and yes on honing the walls carefully as not to get any hone grit onto the crank or anywhere else and clean it up super, super, super good when finished honing.

 

[Chaoticdopey]

ok well 1 last question, if im going through all this trouble should i just get new rods also? as the ones i have are stock shot peened, and im guna have my friend who has a engine machine shop to reasemble it all as im scared to get grit in the cranks and im guna have hot tank it as well

 

[gdb1039]

If you have the funds why not get new rods. Good piece of mind knowing that they are upgraded and one less thing restricting your build later on.

 

[bling5tatus]

As others above mentioned, i wouldn't mess with replacing a single piston unless you're quite experienced with this kind of work. It's much easier to buy a set of matched pistons and new bearings. I wouldn't reuse old bearings, it's like reusing a used clutch from the junk yard, yes it still works but it's service life is very limited in comparison to new parts with no wear on them.