chevybayboy

iTrader: (6)

Ok so I was finishing up my build put my heads on spun motor by hand everything seemed fine tried to fire her up won't start... So I was thinking maybe I installed cam off by a tooth took off over cam is perfectly aligned I tried to spin motor this time it gets to a certain point then seems like its stuck I turn counter clock wise get to a certain point then feels stuck I'm stumped and don't know what to do anyone know what the first thing I should do??

thepitstop2010

What are your cam specs? Sounds like a ptv clearance issue but without know what cam it's hard to tell.

chevybayboy

iTrader: (6)

Torquer v2

Z284thgen

iTrader: (46)

back all the rockers off and try n spin it over again

chevybayboy

iTrader: (6)

Ok I'm going to do that now

chevybayboy

iTrader: (6)

Took off rockers on driver side now it spins free ptv problems with the torquer?

David Q

I didn't have any issues with the TV2 and a set of milled 5.3 heads.

snyousef

iTrader: (11)

Motor specs? What heads?

trans_am7935

iTrader: (15)

i have not seen PTV problems with the Torquer V2, although possible, it is more likely that your cam is not installed correctly, or your pushrods are to long. did you do a rocker swipe test?

chevybayboy

iTrader: (6)

I have untouched 243s but I was just reading somewhere when installing the aftermarket rockers each set you install that cylinder needs to be tdc and the motor is a 98 ls1 with 02 243s 7.4 pushrods

chevybayboy

iTrader: (6)

Cylinder 1 tdc dot to dot everything spun fine until prs... I also have the brain tooley spings

chevybayboy

iTrader: (6)

Went over everything ply thing I can think of is the prs being to long and of course I can't find my pr checker so I have to order another

Possum Boggs

iTrader: (19)

good luck figuring it out man,im in the process of assembling my motor as we speak and im going with the same cam and pushrods,and stock 241's,i'll be following this thread!

chevybayboy

iTrader: (6)

Get a pr checker I think the 7.4 are to long with the ls7 lifters but every motor is diff I thought I was going to be ok but I guess you still always gotta check my rookie mistake

Ferocity02

iTrader: (60)

You may need shorter pushrods with the LS7 lifters, I had to go 0.050" shorter to get the right preload (~0.070). Not sure if this is directly causing your problem or not.

MM98

iTrader: (13)

Did the motor just turn over when you tried to start or did it make any popping or backfire noise? Also your car is a 98, if you're still using the 98' coil harness, you have to make sure the the LH & RH harness are not swapped.. The car will not run if they are.. The pin-outs are different from 99-02 models that can be swapped. If you still have your factory rocker arms, I would throw those back on & try again.. I can't see 7.4's being to long on un-milled 243's.. I run 7.425's on my 243's with a much larger cam.

chevybayboy

iTrader: (6)

Yes it did make a. Backfire noise I don't have my stock 1s anymore I'm using the ls7 lifters with these rocker arms the only thing I can think of is prs to long... Are you using stock rockers?

MM98

iTrader: (13)

Yes, I'm running LS7 lifters & my cam is 236 on intake duration using longer 7.425 pushrods.. Are you still using ur old 98 coil harnesses? Make sure the coil leads are in this order.

1. PPL
3. LT BLU
5. BRN
7. DK GRN

2. RED
4. DK GRN/WHT
6. BRN/WHT
8. LT BLU/WHT

chevybayboy

iTrader: (6)

Ok thanks ill make sure.. I'm putting each cylinder tdc then doing the rocker on that cylinder to see if this is where the ptv problem is then I will use this make sure each harness is on the right side

superbean

if it backfired its sounds like its popping through intake.. so perhaps a valve is stuck open. (from rocker adjusted too tight, too long of pushrod)