Top end oiling

Discussion in 'Street/strip 400/430/455' started by 41speciman, Apr 21, 2017.

  1. 41speciman

    41speciman Well-Known Member

    Hello any help appriciated
    I have a 70 455 that is rebuilt stage 1 heads kenne bell mk 113 cam rhoads lifters and kenne bell roller rockers and shafts all new parts my oil pressure is 60 to 70 at start up cold and hot drops to 35 to 40 at idle the rockers on cylinders 5 and 6 let oil come out great but the rest are oiling but very little I have asked TA perf some buick guys I know in my area and cant seem to figure out what is the problem has anyone had this happen. I went to 69 rocker shafts and it helped on the other rockers oil better but should be all oiling the same up through the push rods all lifters fit the block good not loose have put 400 miles or so on it no serious top end noise
     
  2. RG67BEAST

    RG67BEAST Well-Known Member

    Are you running a hi volume oil pump?
     
  3. Mark Demko

    Mark Demko Well-Known Member

    I'm not familiar with how Rhoads lifters oil the valve train, BUT I do know they bleed off oil at low rpm.
    Maybe that's the issue, maybe its not an issue at all.
    Somebody that uses Rhoads lifters could better answer.
    Why are you using a '69 rocker shaft? Doesn't that have an oil hole that aligns with the feed hole in the #1 rocker tower?
    The '69 rocker shafts oil the rockers VS the '70 and up that oil thru the pushrods.
    That could be an issueo_O
     
    41speciman likes this.
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    You say you are running roller rockers, but then you say you are using 69 rocker shafts. Are you running stock rockers or roller rockers?
     
  5. john.schaefer77

    john.schaefer77 Well-Known Member

    455's do not have the hole to feed the shafts on the passenger side. This was eliminated for pushrod oiling. The remaining hole was there for machining purposes on the driver's side. If you are using 67-69 shafts with solid pushrods in a 455 the passenger side (#2, 4, &6) would not get any oil through the shaft. I also remember the 400/430 rockers use a different sized end than the 455, so they are not able to fit correctly. This is why T/A has the "hybrid" pushrods for using 430 rockers with "through the pushrod" oiling.
     
  6. 41speciman

    41speciman Well-Known Member

    First I installed a set of kenne Bell roller rockers on KB shafts useing 70 pushrods so it oils up through the pushrods and and number 5 and 6 oil great on intake and exhaust and all the others barely oil up and run down push rods and not to the roller side thats when I put 69 shafts on as they are hollow and the 5 and 6 fills up the shaft and helps oil the other rockers while 5 and 6 still oil like crazy as KB shafts are solid. It is a 1970 block so does not oil like a 69 430 up through the front rocker stand. i have the thin TA plate intalled as my KB hi volume pump with larger gears has never worked after priming it with vasiline more than once and why I cant figure out. So now I have KB rockers on 69 shafts 70 pushrods to help oil rockers but why are only 2 oiling on each side oiling better than 1 3 7 and 2 4 8 with good oil pressure. I tried new melling lifters and still the same problem. As with the roahds this is not my first BBB to rebuild but first to have top end oiling issues hope this helps more guys if not shoot more questions thanks to all jeff
     
  7. RG67BEAST

    RG67BEAST Well-Known Member

    I have kenne bell shafts they are not solid. There is oilIng holes for each rocker. Like the 400/430. For the best bushing life you need chromed shafts like the kb.'s.
    Also if the adj. screws are down too far on the rockers the oil will not flow through the oil channel in the rocker to lube the bushing/shaft. Propper adj if original nuts/adj. are used is two threads showing above the nut. If you screw one out (go down not up) you will see once apart. Then buy the propper 455 length pushrods for the lifters recommend preload.
    Ray
     
    Last edited: Apr 25, 2017
  8. 41speciman

    41speciman Well-Known Member

    Im aware of the adjustment for the pushrods on the rockers and 2 to 3 threads are visable. It has no top end noise maybe to solid rocker shafts are stage 2 as ordered alot of stuff from KB in 1985 86 and finally put to use in 2015 I put in the smallest cam the 113 as the other 4 cams I have increase up to a mk7 way big for the street would the prelode cause just some to oil good and the others to only trickle out oil as all rockers are set the same maybe pushrods not the right lentgth ? When and if I get the car out again I will video whats going on and post it just dont want to damage anything more if I have thanks again
     

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