Jspeller

99 FRC vette I just finished head, cam, intake, headers upgrade and motor will not turn over by hand. My heads are 243s milled 30 and torqued to spec. Should I start at removing the rockers and pushrods and give it a try? If that doesn't work what's my next step? Motor ran fine before upgrade. Thanks a lot guys.

A.R. Shale Targa

iTrader: (2)

What cam. What head gaskets, push rod length ????
Did you reuse the original lifters ??? What rockers ??
Did you check piston to valve clearance ???

Jspeller

Comp cam 242/244 112 max lift about 625. Stock head gasket. 7.4 pushrods, stock lifters. I did not measure ptv

Jspeller

Stock rockers as well, I would've used ls7 lifters but they got lost in the mail!

1FastBrick

iTrader: (16)

How did you install the cam?

Did you verify the cam spun over after installing the plate and cam gear?

Did you support the lifters between pulling the old one out and installing the new one?

Jspeller

I did not

1FastBrick

iTrader: (16)

Sure you didn't drop a lifter?

Jspeller

I'll pull the trays tomorrow to verify

A.R. Shale Targa

iTrader: (2)

I'm about 99% certain that a 242 intake lobe barely clears un-notched with unmilled heads. Yours being whacked thirty most likely is your locked engine issue

Jspeller

think a .075-.080 head gasket will even it all out??

farmington

iTrader: (14)

Pull the rockets and pushrods and see if it will roll over with a wrench on the balancer bolt

Jspeller

I pulled the rockers and pushrods no change. The motor turns counter clockwise and clockwise and stops at the same spot. I'll have the heads off to inspec the pistons for marks tomorrow.

1FastBrick

iTrader: (16)

Look and see if you droped a lifter...

tug686spd

iTrader: (11)

Definitely measure piston to valve clearance when apart even if no marks. Cam specs are pretty similar to my old Vindicator and with 243's milled a little more than .030" my fly cuts were .100" intake and .080" exhaust if I remember right.

JakeFusion

iTrader: (7)

That PtV clearance will be too tight with those heads and that cam...

Jspeller

I'm pretty positive I didn't drop a lifter.

whatsa347

iTrader: (6)

Are you sure those are the right pushrods as well? .30 milled heads would use a different length than a stock pushrod size I would imagine?

Jspeller

what were your cam specs? Do you remember what your ptv was and how much you took off your heads?

jimmyp3353

iTrader: (3)

Well, You are using a stock pushrod length with a milled head which tells me you didn't measure. Also, .030 with that much lift I would imagine would require a fly cut due to PTV issues unless you use an oversized head gasket.

Aaron at SDPC

I believe its possible you may have some PTV clearance issues. Especially considering the duration of the camshaft listed and the amount of material removed from the heads.