Jrp1978

iTrader: (10)

Ok The Motor Is Back Apart Valve Cover Of I Mean . And On The Drivers Side There Are 2 Pushrods That Are Tightend All The Way Down But Have A Ton Of Play In Them .100 One Intake And One Exhaust. They Are The Ls7 Lifters Do You Thinkn One Of These Collasped. I Am At A Lost Jason Said He Would Send Me Out A Smaller Cam 224 /228 To See If That Would Help Piston To Valve Clearance As The Set Now The Ptv Is.007 Intake And Exhaust. The Cam In There Now Is 231 / 234 . So Much For My 430 Hp With Ls6 Heads Stg 2.5. Any Ideas?

rocksws6

iTrader: (4)

If the Pushrods are all the same length then there are 2 things it could be: 1- The lifters 2- The cam. That's it, I would pull out one of the pushrods that seems to be fitting right and measure it compared to the one that isn't. If that's not it then your going to have to start digging. Check the cam first and then you get to go after them lifters. Have fun and I hope you get it fixed.

JPH

iTrader: (2)

your ptv is not going to be the same on both intake and exhaust. how are you checking it anyways? are you using the soft spring method or clay? what was your wipe pattern and geometry like, when you mocked it all up? tell me your set up, and i see what i think might be wrong.

Jrp1978

iTrader: (10)

I am using the tsp ls6 stg 2.5 heads with 202 157 valves. 64 cc Tourqer v 3 cam shaft stock head gaskets and 7.4 length pushrods with ls7 lifters. We used the soft spring method to check ptv .

JPH

iTrader: (2)

have the heads been milled?

Jray67

Did you pull the pushrods out to see if they are bent?

Jrp1978

iTrader: (10)

tsp says no on the milling and no the pushrods are not bent.

JPH

iTrader: (2)

no milling of the heads. hmm? honestly, no offense i would say something in your set ups wrong or you did not check ptv correctly. That cam with those heads should clear fine, especially on the exhaust side, with the intake being a little tight. what do the TSP guys say? I've done alot of h/c swaps with lots of milling, and by the looks of your combo, you should be fine, unless i'm missing something somewhere in your combo. Question for you: when you use the soft spring method, make sure there is no preload(valve spring not compressed) when the valves are closed, you just need to turn the rocker bolt untill 0 lash, you know when you are the, because rocker gets tight and just starts to depress valve,(but don't depress it) just turn it so all lash is takin away. check exh. 10* BTDC, and int. 10* ATDC, during overlap cycle.

Jrp1978

iTrader: (10)

The machine shop next to pdr auto is who came over and did the check . Why would there be two loose rocker arms . And why was i able to drive fot 20 miles with it purring like a kitten and them bam all the sudden this happens?
Is it at all possible that this cam is off somehow? i mean i want this combo bad i dont want to go down in cam size at all. Also when they where turning the motor over with valve covers off is it normal for the valves to snap like that is that something i higher lift cam does?

JPH

iTrader: (2)

2 bad lifters maybe? valves close rapidly, due to cam/ramp profile(it's normal). are they int. or exh. rockers that are loose? bolts come loose? wait, when they checked ptv, did they use your LS7 lifters or solid lifters?

Jrp1978

iTrader: (10)

They use the ls7 lifter. Could something just up and happen to the cam ?

Jrp1978

iTrader: (10)

1 intake and one exh. There where side by side. #1 intake and #3 ex both were loose as hell. .100 play and the rest of the rockers move side to side fairly easy is that normal?

JPH

iTrader: (2)

where they the valves that your machine shop buddy checked ptv with?

JPH

iTrader: (2)

doubt it.

Jrp1978

iTrader: (10)

The checked different ones

quick346

iTrader: (4)

.007 is like 2 peice's of paper thickness. that can not be right. .07 but not.007 def something wrong