Comp Cams Pro Magnum Roller Rocker issue - Reply to Topic

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Topic Review (Newest First)

  • 04-30-2008, 09:05 AM
    billet racing


    I've used the same rockers on my motor for nearly 8 years. On my second set because of some failures. I caught before any issues. Each time I went through the engine, I would roll them around in my hand and check for play or resistance. The needles wore through the sides of the rockers. Atributed most of the issue to watered down oil.. had a lot of that problem for a while.

  • 04-29-2008, 09:26 PM
    Pretty mean setup it sounds like, maybe you ARE over the limit for those Pro Mags. Sure sems like they are working out issues as you are not the first case of what I would call "high stress" use that I saw break them. I suspect the SS Hy-Tech's will be fine as they are the "upgrade" from the Pro-Mags. Hopefully since you broke the PM's, they give you the HT's at PM cost instead of charging you the roughly $150 difference.
  • 04-29-2008, 05:41 PM
    yes the wear is on the one edge of the roller i think that happen when it started to sieze cause the geomitry was pretty good when it was set up it wasnt off anywhere . we did notice a couple rocker arms have a twisting motion to them which is alot more then some of the others . i bought a set of Stainless roller rockers to replace them with since i heard they were better by my engine builder .. .

    as to what size cam . im running a solid roller cam 0.722 int./0.722 exh. lift , Duration at 050 inch Lift: 276 int./284 exh. (link to cam) .. guy that set my motor up use to work for the Kendall top fuel funny car team as a mechanic and said he set the springs alil on the lighter side so it wasnt so hard on them for the kinda boating i planned on doing but yes they are stout springs
  • 04-29-2008, 04:39 PM
    is me, or is the wear on the nose roller way more than I would expect forn 8-10 hrs, and way off center

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  • 04-29-2008, 04:36 PM
    Quote Originally Posted by DuaneHTP View Post
    They are.
    Mine have been great. "They're the shiat".
  • 04-29-2008, 04:33 PM
    Quote Originally Posted by IMPATIENT 1 View Post
    smokinlowrider will be here in a bit to tell ya why the pro mags are the shiat i'll keep runnin my crane golds, they've never let me down they's some big biatches, but them big biatches ain't gonna break either
    Actually, No, I won't, as I have never used them.

    I WOULD HAVE used them, on a moderate-lift hydraulic setup (.565"), but, found a set of Hy-Tech's instead (at a great price used), had them overhauled, and spent a bit less than a set of new Pro Mags.

    I don't think there is any way MY setup could possibly break them.

    Just how "high-lift" is the setup you put them in bildoe? RPM and how heavy a springs?

    The springs on a .650" or .700" roller cam are a damn sight stronger than mine, which are pretty darned stout for a Hyd. setup, but mild compared to a lot of other stuff.
  • 04-29-2008, 03:22 PM
    i hope the stainless version is better
    They are.
  • 04-29-2008, 09:32 AM
    just got off the phone with tech and they said take them off send them in and we will get our warranty dept to take a look at them . i ordered a set of stailess steel rockers so i can atleast have it on the water this weekend .. basically paid for a new set and when these are shipped back and they see there was a failure they will credit me i was told ... i hope the stainless version is better .
  • 04-29-2008, 09:27 AM
    If I've seen that once, I've seen it 20 times. I will NOT use those rockers. That has been my experience every tine I've used them; except they might be alright for a stock springed hydraulic cam set up. i personally think they are a waste of your hard earned money.
  • 04-28-2008, 11:05 PM
    This is Something that has happened in the last 6 mo. or so period ,everything we used prior to that in the last 15-20 years have had 0 Problems.
  • 04-28-2008, 10:55 PM
    Quote Originally Posted by Billdoe View Post
    im glad i posted this . i feel more relaxed as to what happen .. juss currious BlownJet13 . you send the set of rockers back they give you a new set or a refund / credit what they do for you???? . i dont have a problem sending them back and i Will not use this style again . while i was at the shop today having the engine checked the builder looked at the rockers and was wondering if they normally have side to side movement and i dont mean slideing on the pin back and forth was more of a pivoting movement like there was slop in the pins on some of the others with no pressure on them .. i think i will order the gold series of rockers crane makes so i at least be on the lake this weekend .
    I think we both use MMSS for our machine work. Some of my rockers also have this side movement you mentioned. Mine are much older and have been ran a good long time tho- without failure (for whatever thats worth) Which is not much IMO, as are they just now getting ready to come apart?. I aquired these on a motor I did not buy them per-say. I have always used the Crower Enduro's and have never had a problem in some fairly serious motors. I may just put those away and buy some Crowers for the new motor I am almost done with for my car. In some way I am glad this post came up, not for your trouble, but it makes good sense to shelf those I have for now.....................
  • 04-28-2008, 10:36 PM
    Quote Originally Posted by blownjet13 View Post
    I am by Know means tyring to bash or stick up for any body just stating, personal experience. they all in most part make very good products.
    we appreciate peeps stating personal experience here man, that's the best way to judge a product and the customer service attached to it
  • 04-28-2008, 10:30 PM
    I am by Know means tyring to bash or stick up for any body just stating, personal experience. they all in most part make very good products.
  • 04-28-2008, 10:19 PM
    Quote Originally Posted by blownjet13 View Post
    Been doing this along time and crane golds use to be all we used,
    had one break once Rocker was laying inside valve cover bearing broke and couldnt find needle bearings up top so had to pull motor apart to retreave them only to find out there wasnt any in the rocker in the first place. Found 3 others the same way. the differnce is had to fight like hell with crane, and never used them since. that was in 1997 customer support is Important. Not saying there bad, just every body has problems its how you handle them that keeps your customers, Yours.
    sure, i agree with ya. i don't run the spring pressures most guys do either, so i'm fairly easy on em and have never had a failure in 14yrs of using the line on different motors. prob would be turned off of them myself if i got stuck with a set by crane , but so far so good. i do use alot of comp products and its really nice to hear them at least be stand up guys and take care of their customers.
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