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Excessive rocker arm chatter.

Discussion in 'General Discussions' started by Paul lynch, Apr 30, 2021.

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  1. Paul lynch

    Paul lynch Junior Member

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    2014 ram and I've rebuilt the top end with Jay's .5 cam kit, ( cam, lifters, pushrods, springs) It runs great and I'm happy with it but for the life of me I can't get rid of the chatter from the rockers. Never had it before. The chatter is coming from both heads. I have did some research and came across some info about to many shims could cause excessive play in the rockers. When I installed the new springs, it did come with easy instructions, basically stating stock shim first and then the shim and locator that came in the kit next. I followed the instructions precisely. Could this be to many shims? What if I were to pull a shim out? I have a new intake and exhaust rocker arm rail coming in the mail and I'm going to install them on the drivers side and see if that helps. However, I don't see that being the problem.
    I've tried a couple different oils
    I did make sure pushrods are in the correct placement lol. I find it funny when someone asks if I installed intake rods in the intake side and visa versa. I imagine someone has though. So, wouldn't the removal of a shim tighten the valve train? I got to thinking about the head gasket set I used too. I'm wondering if they were to thin. They were multi layer and they looked like good head gaskets. However, I did get them from ebay, along with a complete engine gasket set. I told myself to buy the mopar head gaskets but they look good. Any thoughts?
     
  2. Dodge 1500 4X4

    Dodge 1500 4X4 Senior Member Supporting Member

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    Did you have the Heads resurfaced on both sides, depending how much material ( Aluminum ) they removed you will have a greater distance between the rocker arms and the valve stem, Are the shims for the rocker arm Assembly in this case I would remove them on one side and see if that helps, And
    Felpro makes a good head gasket and factory Mopar would be a thicker gasket, was any work done on the Valve seats?
     
  3. Brian2081

    Brian2081 Senior Member

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    Ok, been pulling wrenches for 40 + years, haven't played with to many Mopar's, but correct me if I'm wrong but the shims you are talking about are between the valve spring and head.
    Adding shims helps the valve spring prevent valve float at higher ram. Milling the heads makes the rocker arms, pushrods and lifter lash tighter depending on head gasket thickness and pushrod length.
    By the sounds of it, the rockers are on a common rail. So I would verify pushrod length. How much were the heads milled, how thick is the new head gasket when torqued ? Then start doing the math.
     
  4. Paul lynch

    Paul lynch Junior Member

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    No sir, the (aluminum) heads was not resurfaced. The shims and locators are for spring raise, I would imagine considering the new springs was shorter. Also, no work to the valve seat. I just don't understand how removing shims would help but I heard it would.
     
  5. Paul lynch

    Paul lynch Junior Member

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    Same here. I've done plenty of work to chevy and ford engines. This is the first hemi but it might be one of the easiest engines I've worked on, aside from my issue . Correct. The rockers are on a rail. That's what I figured the shims was for so I'm not sure how removing one would help. The heades were not resurfaced and the new push rods are the same as stock, just chromoly. I just got the new rocker rails today so I'll be installing them on the drivers side tomorrow. I just don't trust them head gaskets from ebay. I might have to tear her down again. I should have know better to use head gaskets from ebay but they look good.
     
  6. Brian2081

    Brian2081 Senior Member

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    Valve springs are shorter than what you removed ?, if so how much and what are the spring rates of the old compared to new ?
     
  7. Paul lynch

    Paul lynch Junior Member

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    Okay, get this! I pulled the tires off and fender covers and fired it up and both damn header flanges had a crack in the welds. How is that even possible? Nearly same locations on the flange welds. Not sure if I prefer the valve train problem or this one. BBK shorty headers. WTH!
     
  8. ram1500rsm

    ram1500rsm Senior Member

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    When i did the cam in my 06 Pontic GTO and 09 Pontiac G8GT, i had to get longer pushrods. those are old pushrods engines, but i'd think since you're replacing your cam with a little more agressive lobe that perhaps you need longer pushrods as well in the Hemi ?
     
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  9. Brian2081

    Brian2081 Senior Member

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    Well cracked header flanges sure will make some unerving noises..lol. I'll take the cracks over valve train anyday and twice on Sunday.
     
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  10. 1SloRam

    1SloRam Senior Member

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    You’re not the first to have issues with BBK shorties, headers alone will also make the engine tick louder, thinner walled headers. But you probably already know that from wrenching experience. Use this as an excuse to go long tube so that cam can breathe better and see the full benefits.
     

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