measuring for pushrods with a hydraulic cam

[jomoper]

Can someone please explain to Me how to properly measure for pushrod length with hydraulic lifters? should the plunger be fully depressed into the lifter?Thanks..

 

[SRT_DSTRHOLC]

use a solid lifter in place of the hydraulic if i remember correctly

 

[70aarcuda]

use a solid lifter in place of the hydraulic if i remember correctly

if you ever compared a hydraulic lifter to a solid lifter then plunger is at different heights...

that is why the solid lifter pushrods are generally longer...

 

[jomoper]

OK that just jogged My memory. I've seen where summit sells a solid lifter to use in place of a hydraulic lifter when checking pushrod length.That tells Me that The plunger should not be depressed.When I did a mock-up of My engine=360 with MP cam,edelbrock heads,the stock length pushrods seemed awfully loose when on the low part of the cam=valves closed.I'm wondering if this was just because the lifters were dry/no oil pressue ?

 

[crackedback]

I take it you are using non adjustable rockers?

If you are, and have a pair of old pushrods, you can make your own checking tool. Cut them in half and thread the center. Twist them until all the lash is gone and add whatever you want preload to be once measured.

Not that tough to do. You need a pretty big micrometer to measure your finished length.

Using adjustable rockers, you likely need a ball cup pushrod checking tool or your can fudge it with a ball/ball checking tool.

 

[DieWilde13]

I have the same Problem right now, but i think my rockers are very worn out.
I decided to use adjustable rockers now. Will see if it will work when i´m back home

 

[demon seed]

If you are using hydraulic lifters, before measuring for final pushrod length, you have to either varify that the lifter plunger is compressed the prescribed amount (.040-.065) or make sure that the lifter plunger is out against the circlip and use an adjustable pushrod. I use an adjustable lifter (Hughes Engines) that I set to the exact length of the hydraulic lifter then using an adjustable pushrod I determined the proper push rod length add .045" to that number that represents the lifter plunger compressed setting when engine running.

 

[moper]

I use checking pushrods. Bolt down the rockers with checkers in place, adjust so there's the right preload on them (depends on the lifters), and then pull it out and measure. I try to use "shelf" part numbers but there are times the only way is custom ones.

 

[mopar340dave]

I consider these guys, Manton, to be the best pusrods on the market!
http://www.mantonpushrods.com/Images/Manton_Catalog.pdf

http://www.iskycams.com/camshaft.php

http://www.4secondsflat.com/Pushrod Length.htm
the shiznit! this method is virtually foolproof...but requires that you purchase their pushrods...which are nice but pricey...

comps instructions are good...you don't really have to worry about the scrub area on the valve tip if you are running stock (non-roller) rockers.... http://www.compcams.com/technical/FAQ/ValvetrainGeometry.asp

 

[jomoper]

Thanks for all the great tips and suggestions !I'm getting My plan of action together.I gotta get this car on the road this summer !