604 issue with no oil to rockers arms

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  • bmchone
    Senior Member
    • Jun 2007
    • 141

    #1

    604 issue with no oil to rockers arms

    Im currently not getting any oil to the top of the heads.. have 40lbs of oil pressure at idle.. but no oil is coming to the rockers arms.. I just had a new set of lifters put in.. I had both Valve covers off and no oil can be seen coming on to rockers...what could be happening??
  • brad hibbard
    Senior Member
    • Oct 2007
    • 974

    #2
    how long did you prime it?

    it takes a while to bleed the air from the lifters-----they will bleed out better without pre-load

    we prime all of our engines with the posilocks removed until oil is flowing from all the lifters and then adjust the valves with primer still running

    sometimes it takes up to 20 minutes to get good oil flow

    Brad
    Race-1 offers competitive pricing on Chevrolet Performance 602, 604 & 525 sealed circle track racing engines. Race-1 specializes in the GM CTC engines and we offer a wide variety of services specific to the 602 & 604 crate engines. Your source for Stealth Racing Carburetors! Learn from Brad's expertise in teaching, too!

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    • bmchone
      Senior Member
      • Jun 2007
      • 141

      #3
      Oh ok.. well definitely not that long.. but we have ran 2 25 lap races and never heard what we are hearing now in the valve train.. Sounds just like the rockers are loose. I went through all the valves last night and set the lash. Some were loose but when we started the engine back up, still heard the sound of rockers being loose. So we took valve covers back off and actually started the engine up and no oil came up to the top of the head. I mean none on either side... we ran the engine for about 45 seconds to a min.. and I know it takes a little time to get the oil up there.. Also the engine did run hot that last race.. Water Temp up to 240-245...we run Renegade Synthetic Blend 10-30.. should I run thicker oil to keep lifters pumped up? Do I need to change rockers now since I don't know how long top end been with lack of oil? I do have the old style rockers with new beehive kit.. If I get the new rockers, do I have to re-shim the springs, etc? Any advice is greatly appreciated. Thanks..

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      • brad hibbard
        Senior Member
        • Oct 2007
        • 974

        #4
        if you ran a race with NO oil to the top the pushrods would be welded to the rocker arms
        so the fact that they are not showing noticeable damage tells me that you are getting some oil

        here is what I would do
        take all the rocker arms off
        inspect the pushrod seat in them for metal transfer do to lack of oil
        leave all the pushrods laying in the lifter---the head gasket will keep them straight
        remove the distributor
        install a drill driven PRIMER---NOT a rod an actual primer---they are about 20 bucks and fairly easy to find
        run the primer and verify that oil is or is not coming up the pushrods

        if you have any questions you can call or text me at 330-540-7223
        its OK to call at night--I understand that's when your working on the car---if I don't answer leave a message or send a text

        1 more thing
        you should definitely get a half set of new style rockers and install them on the intakes----you are just asking for a failure if not
        lets make sure something else is not wrong before we start buying parts though

        Brad
        Race-1 offers competitive pricing on Chevrolet Performance 602, 604 & 525 sealed circle track racing engines. Race-1 specializes in the GM CTC engines and we offer a wide variety of services specific to the 602 & 604 crate engines. Your source for Stealth Racing Carburetors! Learn from Brad's expertise in teaching, too!

        Comment

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