Rocker Arms/lifters Ticking--help!!!

Discussion in '1965 - 1973 Classic Mustangs -General/Talk-' started by 68 COUGAR XR7, Sep 23, 2013.


  1. 68 COUGAR XR7

    68 COUGAR XR7 New Member

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    I have a 67 Cougar XR7 with a 1969 351w that only has about 2000 miles on the motor. It has a roller cam with tie-bar roller lifters. I'm having an issue with the lifters/rocker arms ticking and I can't get it to go away. It seems to tick once the engine is warmed up, but upon initial start-up I don't seem to notice it. The hotter the engine gets, the more they tick.
    I had the rocker arm nuts turned 1/2 turn, so last weekend I tightened them another 1/4 turn to make it a total of 3/4 turn. Still ticking. So last night I tightened the nuts another 1/4 turn, for a total of 1 full turn. I drove the car and now I noticed the engine popping through the exhaust AND the rocker arms/lifters are still ticking. So I back it off 1/4 turn, back down to a total of 3/4 turn. It runs strong with no popping through the exhaust at this setting, but the lifters still tick.

    Does anyone know what the problem is? Why do the rocker arms/lifters tick no matter how tight I have the rocker arm nuts? The oil pressure is 50#, so it's not low on pressure. I can't imagine the lifters are bad since they are pretty new (they have been doing this since the engine was rebuilt). It's not just one lifter/rocker arm ticking, they all tick. I took a picture of the rocker arm pattern on the valve and it seems the pushrod may be a little long, as the wear pattern starts in the center of the valve and rolls to about 3/4 the way across the far side of the valve (I attached a picture). But I doubt push rods being a little too long will cause ticking lifters/rocker arms. Am I wrong? I'm at a loss of what the problem could be. Any ideas guys???? Thanks for the advice....
     

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  2. rbohm

    rbohm Founding Member

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    it seems to be standard equipment on ford V8s. i have rarely gotten rid of a valve tick on any ford V8 engine i have ever had.
     
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  3. horse sence

    horse sence Please don't call me Mom SN Certified Technician

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    i had a 69 torino fast back that i put a 351 cleveland in .it ticked constantly to the point that i could no longer stand it and i sold it .i tried new lifters,adjustable rockers,oil pump they both ran a 45 pounds. i was told by the machine shop the cam bearings were probably installed incorrectly either causing an internal leak or a plugged passage and the lifters were not pumping up fully
     
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  4. valley82

    valley82 Member

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    Yep, I have slight valve tick with my new 340hp ford racing 302ci. I have had it looked at by a mechanic that is a "ford" guy, his diagnosis was to turn up the stereo.
     
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