How do you find out if they are LQ9's, or LQ4's. I have two short blocks and one has a dish piston with valve relief, and the other is just a dish.

 

what year is the block/engine out of?

Here's a LQ4 piston, but LQ9s are a flat top.

 

Don't know the year. That piston is what one of the engines looks like, and the other is like that but has valve reliefs in them. Also, one engine had the long head bolts, and the other engine had the shorter ones. The one with the longer head bolts is the one that does not have valve reliefs on top of the piston. Is there a number on the blocks that I can get that might tell me the year?

 

Yeah, there's a serial No. on the side of the block. Write it down or call Scoggin Dickey, and they can tell you.

Do you have the heads for both blocks? The heads should be aluminum, if not then they're the 99-00 blocks, and those have the longer crank that you do not need . . . unless you're running a 4L80e

 

i never seen no flattops with valve reliefs or dished with v/r neither. weird

 

Hmmm. LQ9's are flat tops and short head bolts started in 05 I know but it could have been 04?? Kinda thinking it was 05 though.

 

Yep, have the heads, and both sets are aluminum. I just can't figure out why one has the shorter head bolts but still has dish pistons. Weird!! Gonna get the number off of the block and call Scoggin, see what they say. Thanks for the replies guys.

Austin