Matt1271

Hey everyone got a 5.3 new cam new ls7 lifters new pushrods. I've got 50lbs pressure at idle on mechanical gauge.lifters are pumped up if I pull pushrod oil cones out of bottom but I'm getting no oil to both sides of valvetrain. Help plx

the_merv

iTrader: (88)

You are or you're not?

Matt1271

I'm not when I pulled old pushrods oil came out bottoms. They were all clear.people are saying wrong lengths pushrods

the_merv

iTrader: (88)

My head hurts from reading what you type. Makes no damn sense.

Wrong length Pushrods wil not affect oil coming through them to the top.

Matt1271

Sorry I have no oil to valvetrain.everything is new. I have 50psi at oil gauge

1FastBrick

iTrader: (16)

what kind of push rods did you use?

Matt1271

The factory 7.4 all were clear and clean.

the_merv

iTrader: (88)

How long have you had it running or are you just rolling it over to prime the oil system?

Matt1271

We drove about 100 miles and it's idled a lot in dw. I pulled a pushrod oil came out of the bottom of it so it's not reaching top for some reason.

1FastBrick

iTrader: (16)

Well they are not actually 7.4 they are more like 7.385
What is your lifter preload set at.

Matt1271

I get just under 1 And 1/4 to torque I have ls7 lifters and .553 lift 111lsa cam

01CamaroSSTx

iTrader: (3)

Oil is comng out of the bottom of the pushrods but not reaching the top with 50 psi of oil pressure makes no sense at all..Pull the valve covers and start the engine and see if the oil is coming up to the rocker arms. Cam and lifters get it first on the LS and I'm a betting man that the oil is getting up there.

Matt1271

It's not I pulled covers . Tried to post video wont let me. There was like just a tiny bit but with covers off nothing at idle. I'm gona change oil with something heavier see if that helps. Would pinched pickup o ring cause that?

01CamaroSSTx

iTrader: (3)

I wouldn’t do anything over a 10W30 and if you had a pinched o-ring you wouldn’t have the oil pressure you have now.

Matt1271

Ok think maybe lifters are all junk? What else could it be?

Matt1271

Was gona post video can't figure out how

the_merv

iTrader: (88)

Thicker oil won't travel as far as thinner oil and is harder to pump, so trying to figure out the logic behind that.

That is not how you check the preload in an LS Engine. You want .080" preload on the Lifters with the Rocker Tip in the middle on the Valve Stem.

As mentioned the Cam and Lifters get oil first. When pulling the Valve Covers are they covered in oil on the underside or are they dry?

Matt1271

Yea I went by the factory spec go to zero lash then 22ft lbs

Matt1271

They are dry when I run it nothing comes out. But there's oil in bottom of pushrods. I pulled couple out to see if worn. They are clear .

the_merv

iTrader: (88)

That is NOT it, that's just the fastener torque.
You measure with a Pushrod Length tool with the Rocker tightened at 22ft-lbs and add .080" to that length. Then find what Pushrod out there is close to that number.

This isn't a SBC.

Sounds like this is your first LS Engine and there's something not right with the Cam install. Possibly the front Cam Plate isn't sealing correctly.