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Author Topic: 428CJ lifter clatter  (Read 4553 times)
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TLea
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« Reply #15 on: July 11, 2016, 07:54:30 PM »

Is the oil pump hi volume? FEs are notorious for slow oil drain back from heads. HV pumps put to much oil up top and starve lower end

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RIP OTIS  2015
robert campbell
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« Reply #16 on: July 11, 2016, 08:18:15 PM »

Amount of lift has nothing to do with valve lash on your motor. The base circle of the cam is the deciding factor.  As Randy said lots of variables.  Did you have any head work done?  Is the gasket crush the same on you new head gaskets as the original?  Did you have a valve job that they may have ground on your valve tips to "clean up the tip"?  Do you have old valves on new seats that may have reduced the valve tip height?

The base circle or lowest point on the cam if less than stock, could cause valve top to rocker arm tapping.  I would follow Randy's advice and install adjustable rocker arms.  Either aftermarket (Dove, Sig Erson) or stock 427 pieces.  Then you can adjust to any cam base circle and ensure a perfect valve lash for your engine.  I never trusted non-adjustable valve train on any engine.

Also put a mechanical oil gauge in place of the sensor to determine true oil pressure.  My guess is your motor is just fine oil pressure wise.

Rob

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GrouperTrooper
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« Reply #17 on: July 14, 2016, 07:54:17 PM »

Thanks all. Oil PSI is not the problem. I'll install adjustable rockers and let everyone know how it went.

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Jayson

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« Reply #18 on: July 15, 2016, 10:36:03 PM »

At this juncture, you might as well go roller rockers. You'll have to change your pushrods and rockers, and they'll be new.

                                            -Keith

                           

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