Hydraulic lifters

[5.7 hemi]

Can you adjust hydraulic lifters with the motor running, assuming adjustable rockers?

 

[miller]

Good question!

Personally, wouldn't think so. Solid lifters need a gap, to allow valves to fully close. But, hydraulic lifters need a pre-load on them, with the plunger set .010 - .030, or there abouts.

 

[lewtot184]

not with the screw and jam nut adjusters. very difficult with the old interference thread adjusters; i know from experience. best answer is: don't.

 

[Cranky]

You can do that with stud mount rockers but not shaft mount.....

 

[5.7 hemi]

Thanks guys!!!

 

[Jackpot50]

Yes, but why?

 

[5.7 hemi]

I asked because if they are not TOTALLY correct from the get go, and you have a few that are clicking, then using a cut valve cover one could adjust the lifter(s) and be bang on correct. So that is why I posed the question.