HT817R lifter quest.???

[gotbuick]

Is the HT817R Chevy lifters anti-pump ups or standard Hyd.

Also, what is procedure for adjusting valves with intake on. (Have adj. rockers) Specifically with these lifters?

[Kerry s.]

Hi Jerry,

From what I've been told (and read).........The "R" at the end of the part number denotes them as "Anti pump-ups".

These lifters have the "cup disk" that the pushrod sits in .050" lower than our Buicks do. What have your block and/or heads had milled from either/both of them? If nothing then purchasing .050" longer than stock pushrods should be ordered IMHO.

Hope that helps........ :)

BTW.......Do you have a source where you can currently get these lifters from or have you had your set for awhile? If you do have a current source please e-mail me off-list. Thanks!:TU:

[gotbuick]

So if they are "anti-pump ups" they should be set around zero lash, correct?

Thanks,
Jerry