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Re: 413 with iron adjustable rockers [Re: NicksGarage] #2058156
04/20/16 02:26 AM
04/20/16 02:26 AM
Joined: Sep 2003
Posts: 4,127
Ramona, CA
NicksGarage Offline OP
master
NicksGarage  Offline OP
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Joined: Sep 2003
Posts: 4,127
Ramona, CA
Turns out the valve in question is really tight in the guide. Probably gummed up with varnish from sitting so long. Going to pull the spring and see if we can free it up. Ordered a set of new pushrods.

Can someone give me the instructions for adjusting the rockers? I know there needs to be a certain amount of preload on the lifters.

Thanks.

Re: 413 with iron adjustable rockers [Re: NicksGarage] #2058180
04/20/16 03:42 AM
04/20/16 03:42 AM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
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Bend,OR USA
On a stock iron block with iron heads with a small or stock cam I would bring the #1 cylinder to top dead center on the firing stroke and then reset the lifter preload on both valves. I would feel and try twisting the pushrod before starting,(set one at a time) if it moves or not then loosen the lock nut on the adjuster a little at a time and lift on the rocker arm towards the valvs until you get a little bit of slop(up and down movement) between the adjuster tip and the pushrod. Once you have a little clearance slowly tighten the adjuster up while spinning the pushrod to determine when the clearances are at zero between the adjuster tip and the pushrod cup(take your time to make sure it is at zero with no preload or clearances scope) When your sure and comfortable with the zero lash and zero preload add from 1/3 to 3/4 turn preload on the adjsuter and lock the lock nut down while holding teh adjsuter so it doesn't tighten up with teh lock nut tsk. Adjust the preload on both valves and then rotate the motor over 90 degrees in clockwise motion looking at the front of the motor towards the drivers seat and set #8. If you want to do one side of the motor at a time then use the firing order to do that side, IE #1 firing at TDC is 270 crankshaft degrees away from #3 firing at TDC, # 5 is 180 degrees from #3 and #7 is 90 degrees away from #5. On the passenger side # 2 cylinder is 90 degrees before #1, #8 is 90 degrees after #3 and # 4 is 90 degrees after #8. #6 is 180 degrees from #4 scope IHTH and doesn't confuse the real issue of setting the lifter preload properly thumbsBTW, you will hear any where from 1/8 to one full turn of preload depending on that persosn likes and dislikes shruggy

Last edited by Cab_Burge; 04/20/16 03:44 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 413 with iron adjustable rockers [Re: NicksGarage] #2058333
04/20/16 12:49 PM
04/20/16 12:49 PM
Joined: Jan 2003
Posts: 1,598
westerly, ri. usa
4
440lebaron Online content
pro stock
440lebaron  Online Content
pro stock
4

Joined: Jan 2003
Posts: 1,598
westerly, ri. usa
mopar performance pushrods hydraulic cam adjustable rockers
P4876392 set P4876391 ea.
gary


all parts are sold as is, all parts are considered used no warranties or returns
paypal/check/money order, shipping is from zip 02891, buyer pays paypal fees 24% IRS 1099A plus 3% of part price, check/money order preferred
site is not monitored 24/7 there might be a delay in response

Re: 413 with iron adjustable rockers [Re: 440lebaron] #2059205
04/21/16 06:50 PM
04/21/16 06:50 PM
Joined: Sep 2003
Posts: 4,127
Ramona, CA
NicksGarage Offline OP
master
NicksGarage  Offline OP
master

Joined: Sep 2003
Posts: 4,127
Ramona, CA
Originally Posted By 440lebaron
mopar performance pushrods hydraulic cam adjustable rockers
P4876392 set P4876391 ea.
gary


Mopar Performance shows these having a ball end on both ends.

Re: 413 with iron adjustable rockers [Re: NicksGarage] #2061205
04/25/16 02:45 AM
04/25/16 02:45 AM
Joined: Sep 2003
Posts: 4,127
Ramona, CA
NicksGarage Offline OP
master
NicksGarage  Offline OP
master

Joined: Sep 2003
Posts: 4,127
Ramona, CA
Got the car back together and running. Cleaned the sticky valve. Pushrods came from Comp Cams. Going to have to find the right heads and replace them later down the road. Someone tried their hand at porting but only on one port of one head. Then they used JB Weld or something to fill it back in. Removed all that and just ran with it. Crappy machine shop that would put out a product like that.

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