jaybuller

Hello yall, i am currently in the proccess of building my 2004 LQ4 6.0. I called the sponser on here texas speed.....they said because i have the new style coated stlye pistons with the floating pins they cant get the stock size replacment rings for it. I thought that the rings were the same for all the 6.0 lq4 engines? im just looking for some moly rings for a stock size bore and stock pistons. not looking to spend 350 odd bucks for the gm replacments either. if yall know of a good place to get them let me know. ALso does the new style 6.0 pistons have different rings then the older style? thanks for any help.
Jay

Rtzracer

iTrader: (8)

Does your pistons have rings on them to get a measurement? Yours should be:

Bore size: 4.000" (101.60 mm)
Compression Ring: 1.5mm
Compression Ring: 1.5mm
Oil Ring: 3.0 mm

In that case, any 99-04 LQ4/LQ9 Piston Rings would work.

jaybuller

yes i do ill go measure the rings right now. so do the 2005 and up lq4 have differnt thickness rings? thanks

v8pwr

iTrader: (19)

I'm not sure if they're available in 4.000 bore but Mahle has some really great ring sets that are very affordable. I bought them for use in a backup LS1 engine. They feature a steel top ring w/ plasma moly coating and a napier second ring. Check out p/n 41858CP to see if it fits your pistons, Mahle says it fits 2005-2007 6.0L. I purchased them through Summit.

streetknight2

iTrader: (10)

Mine had a 1.2 mm top and a 1.5 mm 2nd. Not sure what year my block was, but I think 02'

Let me know if your top is thinner than the 2nd, I have part #'s at home for Mahle's

Rtzracer

iTrader: (8)

If you had 1.2mm top rings then it's a 05-08. And yes 05 and up are different and are not compatible.

jaybuller

thanks guys... soon as i get home i will check them with the micrometer. My engine deffinatly came out of a 2004 silverado 2500... i pulled it myself. it also does have full floating piston pins and coated skirts. not sure if those style pistons ever came with the old stlye ring setup.... ill let you guys know tonight.

jaybuller

yes my 2004 lq4 with the floating pin coated pistons and ls2 style rods uses the same rings as the old stye lq4.... 1.48mm top 1.48mm second and 3.2mm oil controll(with all three peices together,,,,

chrisfrost

iTrader: (8)

RockAuto would be You're cheapest route and their stock rings are pretty good for $50-60

jaybuller

thanks but i went with texas speed since there a sponsor on here... i went ahead and got the speed pro moly coated rings in standard size. my bore specs were dead nuts on spec so i just told the machine shop to deglaze and throw her in the washing machine then install the new clevite cam bearings. thanks yall for the help.