New build,Stealth heads,Mancini roller rockers. I have primed the motor(COUNTER CLOCKWISE)
turned crank to several locations and have oil pressure to my gauge but not to the rockers. Spun motor over with starter without spark plugs in and still no oil pressure to rockers but 25 psi on gauge.
Is this most likely a plug missing under the timing chain
Thanks Mike

Improperly installed camshaft bearing in the block.

wrong rotation position of the cam
or
upside down/backwards rocker shafts

First thing to check is to remove one of the rocker arm shafts and then slowly spin the oil pump shaft by hand using a speed wrench. If you don't get oil then the cam bearing is installed wrong. If you do get oil then you don't have a problem.

You have to have the camshaft in the correct location to feed oil to the cylinder head.

You need to find those two spots where the oil holes are in line perfectly at 4th cam journal and prime away at those two spots. You should see oil.

I agree

"First thing to check is to remove one of the rocker arm shafts and then slowly spin the oil pump shaft by hand using a speed wrench. If you don't get oil then the cam bearing is installed wrong. If you do get oil then you don't have a problem.

Andy I already took off one of the shafts and turned over the motor with the starter with the oil pump shaft in place and saw no oil. That should have done it don't you think???

Also,isn't there a possibility there is a plug missing under the timing chain cover somewhere? I remember reading about this in a search on the subject. Do I have to take the timing cover off to see or can I see up there with the oil pan removed?
I also had a hard time priming this motor if you remember from a previous post. It would not prime until I remover the oil filter and ran the drill with the filter off . It then primed . Do you think it could have anything to do with the oil filter?


"You need to find those two spots where the oil holes are in line perfectly at 4th cam journal and prime away at those two spots. You should see oil. "

Would it not hit those spots while turning the motor over with the starter?





Thanks Mike

rocker arm shaft oil holes down and to the outside, small oil holes are slightly offset from the larger hold down boltholes.

You have stated that you have oil pressure on the gauge.
If you had a missing plug, it would just be dumping oil internally, and you wouldn't be getting pressure.

Better find out what's what before ya fire it. It's worth getting a 5/16 allen rod or priming tool, whatever and spin it good with a decent drill. It will put a good load on your wrist assuming all the galley plugs are in place. I've seen over 60 psi on hand held gauge with standard speed elec cord type whimpy drills.

turn dampener slit to TDC #6 compression & preoil (I forget which bank that is) then backup the crank 3/4 turn CCW till #8 is firing & preoil some more. cut a strip of newspaper 17 and 1/16" to use as a ruler on the dampener back from the TDC slit to get to #8

Pull the cam and rocker shafts. Stick a piece of wire through the oil passage from the head side and see if it makes it through the cam bearing from both heads.

Shouldent he be spinning clock wise

I was able to run a piece of welding rod down the hole in the head and by slowly turning the crank i found where the hole in the cam lined up. I had a problem between the crank and cam that was plugged and machine shop that put it together missed. He did take care of it. I did this on both sides to check the cam bearing alignment.

CCW on a BB (he mentioned Stealth heads) and no need to pull the cam, when you hit the sweet spot (for each side) the rod will drop thru the cam bearing significantly & into the cam, Cant miss it/you'll feel it drop when you get there

" Pull the cam and rocker shafts. Stick a piece of wire through the oil passage from the head side and see if it makes it through the cam bearing from both heads."

Going to try this tonight!
Mike

p.s. Can someone please answer my question that if I turn the motor over with the starter should that align the holes in the cam bearing and feed oil to the heads? I have 25 lbs. of pressure on my gauge when I do this.

What type & weight of oil are you running & standard or high volume oil pump.

With the HV pump and a good battery mine kicks right up to 50-60psi cold. If my car's been sitting for more than a month or so, I pull unplug the dist. wire and roll it over to prime it.