Bad rockers upon removal, is uneven wear the culprit?
06-03-2013, 11:27 AM
#1
Bad rockers upon removal, is uneven wear the culprit? Well, I just recently removed a set of Comp Cams ultra gold 1.72 rockers, with the intent of selling them and getting some money back. After sitting down and giving them all a good wipe down, I noticed that four of the them seem to have bad bearings, as they do not move freely. Upon closer inspection, I've found some wear on one side of all four of the rockers, where they contacted the pedestal. The strange thing is that some of the other rockers show considerable marking on one side of the pedestal mount, but still function fine - the bearings are good. In fact, the rocker to the rear of the pic is fine. The one toward the front is seized up. Could this be a pushrod problem, or a design flaw? Let me know what you guys think. I don't want to have to pay 10 bucks a pop to have these rebuilt, if it was a manufacturing flaw.
By the way, I didn't check these until I got them home, so I couldn't determine whether these were on the intake or exhaust valves, or both.
Thanks!
By the way, I didn't check these until I got them home, so I couldn't determine whether these were on the intake or exhaust valves, or both.
Thanks!
Last edited by 98Zheadsncam; 06-03-2013 at 02:16 PM.
06-03-2013, 02:46 PM
#2
That looks like a rocker bearing problem to me, possibly from the bearings not being seated in the correct position.
I'd contact Comp Cams, and send them the same photo's. There's a good chance they'll do nothing, but you never know until you try.
Comp Cams: ph# 800-999-0853
I'd contact Comp Cams, and send them the same photo's. There's a good chance they'll do nothing, but you never know until you try.
Comp Cams: ph# 800-999-0853
Last edited by 99Bluz28; 06-03-2013 at 02:52 PM.
06-03-2013, 07:35 PM
#3
That looks like a rocker bearing problem to me, possibly from the bearings not being seated in the correct position.
I'd contact Comp Cams, and send them the same photo's. There's a good chance they'll do nothing, but you never know until you try.
Comp Cams: ph# 800-999-0853
I'd contact Comp Cams, and send them the same photo's. There's a good chance they'll do nothing, but you never know until you try.
Comp Cams: ph# 800-999-0853
I'm wondering if these four rockers being so hard to move would have been causing performance issues as well...
06-04-2013, 08:57 AM
#6
I would first hope for replacement by Comp.
Did the rest of the rockers show any wear in those areas?
First thing I would do is hold the rocker by the trunion between your thumb and forefinger and see is the rocker slides back and forth. There should be very little movement.
Next, I would use your calipers and measure the rocker bodies in that area and see if they are all the same.
Then I'd measure the OD of the stands in that area and see if they are all the same.
Obviously, the rocker body shouldn't be touching the stand.
Given that the bad ones are stiff, I think the bearing failed, allowing movement side to side on the trunion.
Ron
Ron
Did the rest of the rockers show any wear in those areas?
First thing I would do is hold the rocker by the trunion between your thumb and forefinger and see is the rocker slides back and forth. There should be very little movement.
Next, I would use your calipers and measure the rocker bodies in that area and see if they are all the same.
Then I'd measure the OD of the stands in that area and see if they are all the same.
Obviously, the rocker body shouldn't be touching the stand.
Given that the bad ones are stiff, I think the bearing failed, allowing movement side to side on the trunion.
Ron
Ron
06-04-2013, 09:04 AM
#7
I would first hope for replacement by Comp.
Did the rest of the rockers show any wear in those areas?
First thing I would do is hold the rocker by the trunion between your thumb and forefinger and see is the rocker slides back and forth. There should be very little movement.
Next, I would use your calipers and measure the rocker bodies in that area and see if they are all the same.
Then I'd measure the OD of the stands in that area and see if they are all the same.
Obviously, the rocker body shouldn't be touching the stand.
Given that the bad ones are stiff, I think the bearing failed, allowing movement side to side on the trunion.
Ron
Ron
Did the rest of the rockers show any wear in those areas?
First thing I would do is hold the rocker by the trunion between your thumb and forefinger and see is the rocker slides back and forth. There should be very little movement.
Next, I would use your calipers and measure the rocker bodies in that area and see if they are all the same.
Then I'd measure the OD of the stands in that area and see if they are all the same.
Obviously, the rocker body shouldn't be touching the stand.
Given that the bad ones are stiff, I think the bearing failed, allowing movement side to side on the trunion.
Ron
Ron
Also, as I mentioned in the first post, the rocker to the rear in the pic still rotates freely on the trunion. I guess it could be that it just hadn't failed yet.
