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LH6 5.3 to LY6 6.0 swap 09 Sierra

Discussion in 'High Performance Mods' started by sand man, May 16, 2012.

  1. sand man

    sand man going to reach 130F..so i practically live there.

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    as some of You know I blew the 5.3 and bought an LY6 6.0, well, today as I was cleaning the engine and checking the block/ rotating , I found that the pistons have some very low but noticable play when you push them from front to back,
    also the rod bearings look like they have a little ware , should i change that too?
    the last thing is that the first cam bearing have copper colored spots, change or leave?

    here are the pics:

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    here is the cam bearing

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    bore was smooth with no signs of ware

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    the block was in great shape acctulay very slight rust consdering its a 2008 and the junkyard was close to sea!

    [​IMG]


    so what do you guys think?
     
  2. Texas Jim

    Texas Jim Texas..It's a Whole 'nuther Country

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    Re: some notes from a biggenr, change rings or change pistons?

    If it was mine... since you already have it tore down...
    I would put new rings, inserts, mains and new cam bearings in it and maybe a high performance oil pump.

    That front cam bearing doesn't look good at all... :ohnoes:
     
  3. slims

    slims If you cant have the truck you love, love the truc

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  4. sand man

    sand man going to reach 130F..so i practically live there.

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  5. txab

    txab Don't get stuck on stupid!

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    Re: some notes from a biggenr, change rings or change pistons?

    Well you've got it apart. I'd break out the micrometers and the plasti-gauge. Check everything. New bearings would be a smart thing to do. Rings and oil pump too
     
  6. slims

    slims If you cant have the truck you love, love the truc

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    Re: some notes from a biggenr, change rings or change pistons?

    As much as you can. Rings and bearings for sure
     
  7. Bigredmariner

    Bigredmariner Administrator

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    Re: some notes from a biggenr, change rings or change pistons?

    All bearings need to be changed. They are cheap and you have it apart.

    Have the journals of your crankshaft polished by a machine shop and check the clearances before buying new main- rod bearings. In case the crank needs machining, which is doubtful but possible..

    Hone the cylinders and take measurements, honing is probably the only thing needed from the looks of the pics.

    If you end up having to bore the cylinders then obviously you'll need new pistons, otherwise, re-use the pistons and get new rings.

    Upgrade rod and main bolts to ARP fasteners while you have it apart. Head studs would also nice to upgrade at this time.
     
  8. sand man

    sand man going to reach 130F..so i practically live there.

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    Re: some notes from a biggenr, change rings or change pistons?

    and how much will that cost :ohnoes:

    im going to change cam bearings,rod bearings ,piston rings, connecting rod bolts, well use my arp head bolts from the 5.3 the ARP tech said that i can use them for 3 times or more if they arent stretched out or over torqued
     
  9. sand man

    sand man going to reach 130F..so i practically live there.

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    Re: some notes from a biggenr, change rings or change pistons?

    what do you think about sealed power stuff ??
     
  10. Bigredmariner

    Bigredmariner Administrator

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    Re: some notes from a biggenr, change rings or change pistons?

    I've used a ton of their stuff and never had any issues. :thumbs:
     

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