Bullet hydraulic roller
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Bullet hydraulic roller

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    Default Bullet hydraulic roller

    I have a buddy of mine that has a 69 z28 camaro with a bored 60 over 396 closed chamber domed pistons with a set of oval port heads, it has a bullet hydraulic roller set up in it in the 600 lift of so. The motor has around 150 miles on it heres the problem the lifters are making some noise they tap like they are not pumping up until the motor warms up is this normal or is there a problem it has 70 psi of oil pressure sitting idle when its cold. You would think if the lifters were bad it wouldnt quit tapping. I have them adjusted with 3/4 turns down from zero lash like bullet said. The motor run great other than this problem

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    Quote Originally Posted by matt wheeler View Post
    I have a buddy of mine that has a 69 z28 camaro with a bored 60 over 396 closed chamber domed pistons with a set of oval port heads, it has a bullet hydraulic roller set up in it in the 600 lift of so. The motor has around 150 miles on it heres the problem the lifters are making some noise they tap like they are not pumping up until the motor warms up is this normal or is there a problem it has 70 psi of oil pressure sitting idle when its cold. You would think if the lifters were bad it wouldnt quit tapping. I have them adjusted with 3/4 turns down from zero lash like bullet said. The motor run great other than this problem
    Who's lifters and what weight oil?
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    Default bullet cam

    They are bullet lifters if i remember right he is running 10-30

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    Quote Originally Posted by matt wheeler View Post
    They are bullet lifters if i remember right he is running 10-30
    If they are Bullet, then they're probably Morel. They have a break in period of a few hundred miles or however-many-hours. There is a small ball and check valve that take time to seat fully but after some run time this should stop.
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    Default lifters

    I just got off the phone with him the motor has around 350 miles its 3 years old he starts the motor once a week and drive it around the block about 10 to 15 times a year. I pulled the intake and valve covers off and noticed one thing thats bad you can move the rocker from side to side almost off the tip of the valve it has the wrong guide plates on it im changing them tomorrow, do you think that could be unloading the lifter somehow or bleeding pressure off the lifter. My buddy is loaded and will buy anything it take to fix his car just dont want him to buy a set of lifters for no reason. I know morels are a good product but do you think he could have got a bad set everyone has failure every now and then. The lifters look like a real nice quality piece but from the outside you cant really tell anything about them can you. Im thinking maybe buy a set of cranes or something and see if the noise stops a little if it doesnt then i know its something else like not enough oil pressure to them.

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    First, you need to change the guide plates out YESTERDAY! Like Steel asked, what TYPE/BRAND and wt oil is in this thing.



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    Default lifters

    Guide plates getting changed in the morning i have a set laying around. He runs Valvoline 10-30 i was thinking about stepping up to a little thicker oil probably wouldnt hurt

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    Quote Originally Posted by matt wheeler View Post
    Guide plates getting changed in the morning i have a set laying around. He runs Valvoline 10-30 i was thinking about stepping up to a little thicker oil probably wouldnt hurt
    No, the thicker oil will probably only make the problem worse. First see if it changes after the guide plate change.



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    Default lifters

    K thanks guys i kinda figured you guys would agree on changing the guide plates first

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    Quote Originally Posted by matt wheeler View Post
    K thanks guys i kinda figured you guys would agree on changing the guide plates first
    Thats assuming you have 3/8 PRs and 7/16 guide plates. If it has 3/8 guide plates and 5/16 PRs, I'd be changing the PRs



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    Default pushrods

    Im not sure whats in it yet just got it apart this afternoon going to check it out a little bit better in the morning. I think they are 3/8 with 7/16 pushrods

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    Quote Originally Posted by matt wheeler View Post
    Im not sure whats in it yet just got it apart this afternoon going to check it out a little bit better in the morning. I think they are 3/8 with 7/16 pushrods
    I think you have that backwards. 7/16 PRs won't even fit into a 3/8 guide plate.



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    Default pushrods

    Yep sorry gn7 its been a long day you know what im saying

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    Quote Originally Posted by gn7 View Post
    I think you have that backwards. 7/16 PRs won't even fit into a 3/8 guide plate.
    It would be rare to have factory 7/16 guide plates, and just as rare to have aftermarkets on there by mistake...but...stranger things have happened.
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