broke a harland sharp 1.5 big block rocker arm today.

the roller lifter has come apart in the valley, the puck where the pushrod goes, has popped out of the lifter assembly. Is this lifer bad?
Or can the "puck" be reset into the lifter?
Comp 829-1 roller lifter.

I notice during a cleaning slight air pressure will pop those right out. So they should be good to go, after a clean bill of health for the rollers is determined.

It's common. I have had some pull out by the suction effect of just pulling a pushrod out of the lifter body.

The o-ring on the "disc" holds it together, but it doesn't take too much to get them to come apart. I attempted to buy some spare o-rings from CC, but they don't sell them. I didn't have anything that matched, but I am sure they aren't some oddball size. Check everything thoroughly for damage and clean the parts. Use some loctite or a bit of epoxy to put it back together.

They are a good product, but it would be a little more comforting if these had a better design for retention of the seat.

MB

You should check that lifter very closely for damages to the needles in the roller wheel and on the axle, rub the lifter across your palms several times and see if you can feel any roughness or tight spots or lock ups as you roll it, press hard also you can also use your thumb or fingers to roll the wheel of the roller and feel for roughness or flat spots on the needles or axle. Clean them in solvent and dry them first

Thanks for the info, I am going to try to use a 4 finger graber to retrieve and re-set the puck in the lifter.With the intake still on, as it is a stage vi intake that is Yamabonded on. ( hard to remove).

If not, I will have to pry the intake off..then a check of the needle bearings would be in order.

Also if one rocker broke, is it just a matter of time before the rest start to break?

Todd;

Might be an optical illusion from the pic, but it looks like your pushrods may be too short(adjuster sunk into the locknut)??

MB

Looks to me like the rocker broke accross the hole, there's not that much sticking out the actual original bottom. Question is why did that one break? What are the springs like? What cam? ANy cahnce the valve is bouncing on the seat? Did the roller pop out of it's bore?

I wish I new why it broke, About 8000 street driven miles on used rockers. 3 years in service.
Idles @ 800rpm in gear. (this may be too low)

A custom Dwayne spec. comp solid roller with mild ramps. 200lbs on the seat 650lbs open spring pressure. comp 999 springs..630" lift.

Funny thing is I have never had to adjust the lash after initial setting. I check lash at least 2 times a year. .024" cold lash.

Rocker broke while @ 30 mph ,light throttle 1300rpm.

Valve train has always been very quiet.

The lifter did not pop out of the bore.

You should at least pull all the rockers and look for cracks where the one broke. It starts with a small crack that grows until there isn't enough material to handle the load, then it breaks.
Cory

Things break and you said you got em used so who knows. I`ve been running my harlands on the street for over four years and have over 150 passes on em w/200-210 seat and 525-540 open pressures and they looked good when I changed springs but now that I stepped up to 235-240 and 580+ maybe now the`ll let go also.

Like Brad.. I'd say time for new rockers. I don't think I'd go Harlands for 650 lbs open stuff. With that much, the valve ain't bouncing... that's for sure. But I think it's time.

"A custom Dwayne spec. comp solid roller with mild ramps. 200lbs on the seat 650lbs open spring pressure. comp 999 springs..630" lift."..

Are you saying you have a cam with .630 lift? That seems like a lot of spring pressure for .630 lift, if that's what you have. An old super/stock racer taught me years ago that too much spring pressure kills horsepower...but then that's another post discussion..

Dwayne did not spec out the springs. These were again used springs that came with the used heads.
Dwayne did a valve job and flowed a few ports.

Cam specs.int 4149 lobe 260*
ex 4020 lobe 266*
lobe sep 114*


I double checked comps web site for 999 spring info. 196 lbs. closed and 608lbs@.650" lift.
I am sure the pressure is lower, with as many of miles.

I did check all the rockers for signs of stress cracks. Looks ok?

I feel lucky for as little damage that appears.

New rocker will be here friday.