Will RB rockers Fit on LA motors?
When i compared the shafts the two with all there parts on them and noticed the differences. i notice they are about the same width but the length is quite noticeable. the reason i bring all this up is i used a BB rocker spacer to center no.1 exhaust rocker arm. on my LA 360 head...
i had a slight noisy no 1 cylinder head the exhaust side when i pulled the rocker cover i noticed the rocker was not centered on the valve stem so i pulled it and then i noticed a slight nick with a tiny chip on the valve stem i wonder now if the rocker damaged the valve enough to have to replace it?
or should i get some type of cap?

 

Nope.

 

Hm...

You cant switch the rockers with the big blocks. I have used other make / models on SB with stud set up many times. Not on shafts.

Question is how did that stem chip? Side loading the guides will cause them to walk and actually move the seat and oblong the guide. But chip? Maybe a defect..

You can add a stem cap but need to make sure you have room to adjust the length on the PR side. Since the shaft is not adjustable the PR length needs to be remeasured.

.080 is popular size cap thickness in 3/8. Use a small dab of grease under the cup to hold it during mock up... those suckers are small and can get away from you quick.

 

Yea that's what i said.
i have never seen a chip before
7.550 is my push rod length.
i see no sighs of heat or oil starvation
Let me start at the beginning .
i started hearing a small tap valve tap not a header leak
so i removed the cover and the # 1 x-haust rocker was not centered on the stem i double checked made sure i didn't have a rocker reversed, when i removed the shaft the stem has a small chip almost like a nick like something hit it i don't remember damaging it when we assembled it... but anything is possible.
What's troubling the situation now is the valve noise there is a tick in there
other than the nick there is no serious damage or wear to the rocker or valve stem.
i am assuming the rockers have to have some lineal travel or would it be better to fix them with spacers like the B.B. rocker shafts?

Do you think i should replace the valve?
do you think a lash cap would stop the tap i'm assuming the lash should be increased.
462 482 is the lift on the cam
7.550 push rods
stock rockers/shafts
318 /360 heads
cam is a matched kit/springs included
vacuum test shows no valve flutter smooth steady reading 13 hg

 

Hands will be dirty on this one.

Pull the rockers off. Stuff that cylinder with rope with piston at TDC. Pull the spring and check the side play on the valve guide to valve.

Measure retainer to guide clearance with micrometer.

If she isnt sitting square on the rocker she may be walking the seat on you and pulling guide out of round. Or that valve is bent maybe.

Its it a voodoo cam? What springs are you using?

 

i wish it where a voodoo cam but live and learn...
it's a comp cam...good runner i'm satisfied. 275 284-462-482 D. L.
for a quick note i run a zinc additive in the oil.
the cam is a kit from comp, my initial inspection of the springs locks retainers is all normal.
i have a air injection fitting to pressurize the cylinder.
Spring spec. hope this posts right...
O.D. Dia. 1 I.D. Dia. 2 Damper Seat Load Open Load Coil Bind Rate (Lbs./In.) Titanium Retainer Steel Retainer Cup Seat Shims
1.494 1.080 Y 101 @ 1.650 242 @ 1.250 1.100 353 730 740, 743, 744, 1730 N/A 4754

 

That's a good cam. And the correct spring.

I would def pull that spring and check the guide play. You will see the discoloration on the upper part of the stem if its heating / galling.

Inspect the pad / step to see if you are losing contact or walking the springs. You will see transfer material or witness marks.

And lastly measure you installed heights to recheck open and closed pressures. When seats are recut or different valves are used it can dramatically change the spring rates.

 

Thank you PK1 i will let you know what i find...