1Hotbird

iTrader: (5)

I need some help! I have rebuilt my ls1, The short block is basically stock, new rings and bearings. I installed Patriot Performance #2013 Heads, Gm Hot cam (Yes I know but forgive me I'm new to the ls1),New Comp lifters, Hi tech 7.325 Pushrods, Hartland sharp Roller rocker arms, SDPC Ported oil pump, New o ring, I have read alot about valve train noise but I think My noise is louder than normal. I have 45-50 Psi Oil pressure cold 30-35 Psi hot. The noise sounds like 1 or more of the lifters is colapsing. I have heard about the o ring causing this but I did install a new one. Should I have better oil presure than this? Any help you can give me would be greatly appreciated!!!!!!!!!

cenTX-LS1

iTrader: (1)

30-35 at idle is ok. Does it rise when you hold the revs up?

1Hotbird

iTrader: (5)

Yes it jumps to 45-50 if you rev it up! the noise also gets louder as you rev it up until 2500 rpm when it fades but dose not go compleatly away, at about 3500-4000 rpm it comes back pretty load again??

John02SS

iTrader: (47)

The motor should hold around 40 hot. Sounds like the o ring didn't seal good. Also the 7.325 is a pretty short pushrod, any reason you used that short a pr? The heads would have to be cut ALOT to warrant anything shorter than a 7.35. This could cause the noisey valvetrain as geometry could be off.

John

1Hotbird

iTrader: (5)

I just measured my preload on my lifters and i am getting .050" Of lifter preload! that is why I went with 7.325 pushrods

1Hotbird

iTrader: (5)

Also when I run the engine with the valve covers off the oil just slowlly trickles onto the rocker arm should it flow faster?

1Hotbird

iTrader: (5)

I should also mention there are a few air bubbles on the dip stick, but I see no air bubbles coming out of the pushrods! Any help would be greatly helpfull!! Thanks

1Hotbird

iTrader: (5)

Anybody have any ideas??????????????????????????????
Thanks so much!!!!!!!!!!!!

1FST99Z

iTrader: (9)

i am with john02ss. i dont see why you would use a shorter push rod unless the heads are milled a bunch. just my .02 hope this helps

98A4LS1

iTrader: (1)

30-35 psi hot idle is fine. 45-50 psi cold sounds about right too.

Honda Nick

iTrader: (1)

I'd say your oil pump gasket is letting air bubbles into the oil, you should try replacing it.