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valve adjustments

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jonlyjayman:
By roller tappets-I mean when valve covers are off, and I mess with the rocker arms-there are small rollers that push down on valve stem. I emailed the guy I bought car from and he said they are hyd. lifters--not solid lifters. Am I using the wrong phrase? I remember an old v8 I owned-72 Grande 302...and it had no roller on rocker arm....just metal on metal pushing down valve stem. What do I have?   Thanks Steve...........Jay

lovehamr:
You've got roller rockers and flat hydraulic tappets.  There are several types but that really doesn't matter right now.  What is holding them on the stud?

Steve

jonlyjayman:
   the rocker arms are held on with a half-circle looking thing, then a nut on top of that.........the half circle thing is sitting inside the hollow part of rocker arm.  Thanks for your help steve, I really am not a huge car guy--just love mustangs.

jonlyjayman:
    Also Steve....Should I drive the car to get oit all warmed up before adjusting the valves?   Or is cold engine OK<  Thanks,  Happy ThanksGivin'     Jay

lovehamr:
First, cold is fine.  Is there any way that you van post a pic of your rockers?  Or do they look like one of these:



or one of these?



The ones on top should have this type of nut with lock;


And the lowers would look like this:

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