Nate's Z28 Project

[Dummybait]

Scott I do have true duals, same as Joels, except it has dual cutouts and X pipe. Could use a little tweaking though. Trying to sell it.

It will help me out and Nate out

I didn't know they gave tassels in college? Haha.

Thanks for the offer TJ, i kinda have my heart set on Tsp's setup though. I'll definitely give you a holler if I decide otherwise!

[nascarnate326]

Had Joel stop over and help me with adjusting the rocker arms. I think the drivers side are perfect but the passenger side makes a noise. There is also one rocker that shoots oil out much more than the others.

What causes this?

I had all of my lifters tested at the engine shop but thats all I think it could be?

Any help is appreciated.

[nascarnate326]

Also feels like my car has developed a vibration. Not RPM based but anything over 20ish mph it has a gnarly vibration. Cant tell if its front or rear.

How does a vibration start while sitting in a garage!?

[JoeliusZ28]

Nates car was very different than mine in terms of rocker adjustment. The first rocker i adjusted seemed to work like it should. Tighten to zero lash, then about 360 degrees after the valve started to open so we backed it off 180 and set it there. There were several lifters though acting like it was a solid roller or something though. An eigth turn past zero lash and the valve was starting to open. Even after running the engine to prime the lifters so we tried engine running method instead and got it close as we could but no matter what we did, one on the passenger side would make noise once the car warmed up... Did it after 3 adjustmemts. Im stumped, but i think the issue is lifters. Mine adjusted consistent across the board.

The lifter that was pumping 3x as much oil as all the others seemed odd to me too. Even at idle it was flinging it off onto the header while the rest just dripped. I suspect thats the one making noise but it never did it for us with the cover off in the garage, always after a few miles down the road.

[meissen]

Hrm that sounds odd... maybe try talking to the machine shop and see if they know what would cause that

[mcalus]

I think mine are still off, I'm not sure how much noise they should make.

[nascarnate326]

Something on my passenger side makes considerable noise. I don't feel like I should be driving it kind of noise

[Fox Slaughter]

Brand new LT4 springs correct?

[nascarnate326]

Brand new LT4 springs correct?

Correct.

15/16 squirt oil as they should, but one looks like its firehouse compared to the other garden hoses n

[TylerT/AZ28]

thats odd, could a lifter or something be too tight or loose that oil is coming up too fast? also just throwing this out here i have the oil hole clips for rockers if you need them they might help your spraying issue when your adjusting them if you want to borrow them.

[Fox Slaughter]

I know you said you have the lifters checked but maybe you collapsed the one during the install.

Did you clean the lifters?

http://forums.corvetteforum.com/c3-t...aying-oil.html

[JoeliusZ28]

Yeah id agree that damaging one or more would have been possible on the install. If it were me i think id start looking into a set of lifters. Sucks, but not worth wiping out a brand new motor over

[TylerT/AZ28]

did you replace lifters and pushrods?

[nascarnate326]

did you replace lifters and pushrods?

No, engine shop said they looked fine and would be alright for the hotcam kit.

Sucks that all but one are working fine. FAIL.

[JoeliusZ28]

No, engine shop said they looked fine and would be alright for the hotcam kit.

Sucks that all but one are working fine. FAIL.

I dont know if id even trust the others though. Could be the vibration you have if the valves arent closing all the way

Also if they were factory hardened pushrods those are fine to use with a cam kit, even the regular ones are probably ok on LT4 springs