Need HELP! please please!!g5x4

SSdimension · 10-26-2009, 06:57 PM

I got Ls6 heads stock, a g5x4 cam, and stock pistons. The heads are not milled, ported, or deck'd. They are stock. The pushrods I bought from Trick Flow on the Tick Performance website and the pushrods are harden. The spec of the pushrods are 7.400 and .080. But the piston is kissing the valve. The springs on the Ls6 heads are aftermarket handling up to .650 lift. Can someone diagnose the problem???Thank in advance and your response will be GREATLY appriciated. Antonio.

teke184 · 10-27-2009, 07:51 AM

isn't that the cam that lgm lists as "secret"?

if so...how the hell are we supposed to know anything about diagnosing it.

SSdimension · 10-27-2009, 01:04 PM

Quote:

Originally Posted by teke184

isn't that the cam that lgm lists as "secret"?

if so...how the hell are we supposed to know anything about diagnosing it.

I know and it sucks.

I hate to put the Ls1 cam on, I have not driven my car in 9 months and it will be sad to see it only with bolt ons. Does anybody out there have a g5x4 cam. If so what size pushrod? Thanks in advance. Antonio.

tim99ws6 · 10-27-2009, 01:34 PM

You need to call LG

RSbeast · 10-27-2009, 01:38 PM

Possibly how it is degreed?

tim99ws6 · 10-27-2009, 02:08 PM

a cam that size with the cam degree off by one tooth definitely would cause problems.

SSdimension · 10-27-2009, 03:50 PM

Quote:

Originally Posted by tim99ws6

You need to call LG

Got a number for LG Motorsports or where I can find it? From a logical guess its a .609/.612 or something like that. Some g5x4 owners said its almost identical to the t rex cam.

tim99ws6 · 10-27-2009, 03:53 PM

Quote:

Originally Posted by SSdimension

Got a number for LG Motorsports or where I can find it? From a logical guess its a .609/.612 or something like that. Some g5x4 owners said its almost identical to the t rex cam.

If it's similiar to Trex, it's considerably larger than .609/.612, and i'd assume its the duration that is busting your chops as much as the lift!

LG Motorsports
http://www.lgmotorsports.com
Phone number: 972-429-1963
1211 S Highway 78
Wylie, TX 75098

DCsLS1 · 10-27-2009, 03:57 PM

you might need to go back to the dot to dot part make sure they are perfectly straight up and down when you line them up and then turn it over by hand one time and make sure they line up again at the right point if it is off even a little it could cause this

tim99ws6 · 10-27-2009, 03:59 PM

Quote:

Originally Posted by DCsLS1

you might need to go back to the dot to dot part make sure they are perfectly straight up and down when you line them up and then turn it over by hand one time and make sure they line up again at the right point if it is off even a little it could cause this

Yep...one tooth is a considerable amount of advance/retard on a cam that was already designed to BARELY fit dot-to-dot

SSdimension · 10-27-2009, 05:16 PM

Called. Only problems it can be is the head gaskets clearance or to fly cut the pistons. Any suggestions???

tim99ws6 · 10-27-2009, 05:31 PM

What head gasket did you use? You shouldn't need to flycut pistons on that dude. Did you talk to Louis@LG??

JPH · 10-27-2009, 05:39 PM

Its a 240/244 113 cam. It should clear, but just by slim margins aslong as everything else is stock! And how are you checking it? Soft spring method or what?

txh0tb0i972 · 10-27-2009, 05:43 PM

you cant reuse head gaskets or bolts is the problem

Minshall · 10-27-2009, 06:18 PM

Ive got the same cam but im still using my LS1 heads. If the heads are milled, thinner head gasket or etc.. then youll run into the ptv issues. As long as your using stock head gaskets, re check the cam timing.

SSdimension · 10-27-2009, 10:54 PM

Quote:

Originally Posted by tim99ws6

What head gasket did you use? You shouldn't need to flycut pistons on that dude. Did you talk to Louis@LG??

How many LG stores in Texas. I dont know who I spoke to in the store in Wylie, TX.

Quote:

Originally Posted by JPH

Its a 240/244 113 cam. It should clear, but just by slim margins aslong as everything else is stock! And how are you checking it? Soft spring method or what?

Seeing it from one of the holes from the headers.

Quote:

Originally Posted by txh0tb0i972

you cant reuse head gaskets or bolts is the problem

I know now..thnx

Quote:

Originally Posted by Minshall

Ive got the same cam but im still using my LS1 heads. If the heads are milled, thinner head gasket or etc.. then youll run into the ptv issues. As long as your using stock head gaskets, re check the cam timing.

Heads are stock. Bought them from txhotboi972. Says they are stock and I believe they are. Gasket Brand is EnegineTech. The parts stores said it stock replacement.

If I order stock gaskets from all the parts stores will they all be the same size?

LSX Truck · 10-28-2009, 01:38 AM

great cam! make sure u have the accessories to go with it

tim99ws6 · 10-28-2009, 09:34 AM

You need to go to GM, and get a set of "MLS" head gaskets. Just ask for head gaskets for a 2002 Camaro Z28 and they should sell them to you. Or buy them from a distributor/sponsor---> I prefer Speed Engineering.

Don't run crappy auto-parts stores version of head gaskets, and make sure you get a new set of bolts. They are stretch-to-yield. Once they are used once, they will never work again(as you already know now).

Slow 346 · 10-28-2009, 09:51 AM

A stock replacement gasket from the parts store dosent necessarily mean its the same thickness as a stock GM one. Get a stock GM gasket to be safe.

ws6_bandit · 10-29-2009, 03:36 PM

I have g5x4 and stock heads. Installed mine dot to dot and no problems. PTVC is very close tho. Im pretty sure valve drop between ls1 and ls2/ls6 is pretty much the same. You must be off a tooth or you have the wrong head gasket.