Rick Speed

iTrader: (55)

Ok now I know the LQ4 is dished and LQ9 is flat top.. Question is how big of a dish? I have a 6.0 new that I'm putting in a 99TA and with a borescope I can see a small ridge around the edge of the piston and its fly cut also. Is that a LQ4 style? or is it the higher compression LQ9 that required valve reliefs.

shortturn

The Lq9 is totaly flat no ridge

Rick Speed

iTrader: (55)

Thats what I thought.. the valve reliefs threw me a little. I wonder why they put those on a dished piston

NemeSS

iTrader: (127)

someone either cut them in, or the valves were hitting the piston.
to date ive never seen a stock lq4 with vr.

LT194CamaroZ

iTrader: (15)

is it maybe the ly6, i think i read that they had valve relefs, but also i thought they were flat top

Soul TKR

iTrader: (4)

here's my LQ4 pistons

AINT SKEERED

iTrader: (2)

in my research on my lq4 , it seems they are 7cc dish.

Rick Speed

iTrader: (55)

Yeah they look like that but have valve reliefs.. weird huh

GMCtrk

iTrader: (23)

No LQ4 ever had valve reliefs to my knowledge.

ramdaspadhye

iTrader: (3)

Same here. My LQ4 doesn't have them. Did this motor have a larger cam in it to your knowledge?

SweetS10V8

iTrader: (4)

My LQ4 has a dish and valve reliefs.... I cc'd everything, but dont have my math here. Ill see if I can find a picture, if I took one, also.