Adjustable push rods

Discussion of the 331-354-392 HEMIs.

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besty34
Posts: 4
Joined: Wed Sep 12, 2012 2:40 pm

Adjustable push rods

Postby besty34 » Thu Sep 13, 2012 7:24 am

I've bought a rebuilt 341 DeSoto with adjustable pushrods - the cam is reground by the looks of it , it's all ready to go but I just want check everything before I fire it up - does anybody know the clearances on the rockers ? Thanks

besty34
Posts: 4
Joined: Wed Sep 12, 2012 2:40 pm

Re: Adjustable push rods

Postby besty34 » Thu Sep 13, 2012 7:50 am

Sorry just noticed I put this in the wrong place - I will repost it

DHEMI
Posts: 100
Joined: Mon Mar 06, 2006 8:01 am

Re: Adjustable push rods

Postby DHEMI » Thu Sep 13, 2012 8:25 pm

I know it may seem odd to ask,but is it a solid or hyd.lifter ?

besty34
Posts: 4
Joined: Wed Sep 12, 2012 2:40 pm

Re: Adjustable push rods

Postby besty34 » Tue Sep 18, 2012 11:57 pm

They are hyd , so am I right in thinking that it's just a case of taking up the play , then readjusting after the lifters have pumped up ?

wayfarer
Posts: 77
Joined: Sun Feb 26, 2006 4:16 pm
Location: Central Ory-gun

Re: Adjustable push rods

Postby wayfarer » Sat Sep 22, 2012 7:50 pm

Most cam/lifter manufacturers will suggest 0.040" to 0.060" preload on the hydraulic lifter.
With the lifter sitting on the base circle (heel, back side, whatever) open/extend the pushrod until all slack is gone but the puck has not yet moved. Now, open an additional 1 2/3 turns (at 32tpi this gets you about 53 thou) and lock the nut.
Repeat 15 more times. Yes, it will be handy to bend a couple of end wrenches to better fit the space.
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besty34
Posts: 4
Joined: Wed Sep 12, 2012 2:40 pm

Re: Adjustable push rods

Postby besty34 » Tue Sep 25, 2012 6:50 am

Thanks for that

George
Posts: 625
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: Adjustable push rods

Postby George » Tue Sep 25, 2012 10:12 pm

On my 331 I just snugged them, any more it wouldn't run.


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