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325 Poly rocker arm resurfacing.
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local2Ed
Posted 2020-03-31 2:41 PM (#596293)
Subject: 325 Poly rocker arm resurfacing.


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1957 Dodge Sierra 325 poly engine.

Some of my rocker arms, intake and exhaust, show some wear from the valve stems. 

Can these be resurfaced? 

Are these a hardened surface?

Anybody know the best way to do them?

One machine shop told me it can be done with a 4.5" grinder and a flap disc.

Anybody ever do this? 

Thanks.

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Powerflite
Posted 2020-03-31 2:54 PM (#596294 - in reply to #596293)
Subject: Re: 325 Poly rocker arm resurfacing.



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Yes you can do that as long as you don't go overboard. Take off as little as possible. It is best to use adjustable pushrods afterward.
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57chizler
Posted 2020-03-31 3:06 PM (#596297 - in reply to #596293)
Subject: RE: 325 Poly rocker arm resurfacing.



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In order to correctly resurface the valve stem contact pads, it has to be done so that the degree of arc and parallelism are maintained; kinda hard to do freehand by eyeball.

http://www.rockerarms.com/
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local2Ed
Posted 2020-04-01 8:30 AM (#596325 - in reply to #596297)
Subject: RE: 325 Poly rocker arm resurfacing.


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57chizler - 2020-03-31 3:06 PM

In order to correctly resurface the valve stem contact pads, it has to be done so that the degree of arc and parallelism are maintained; kinda hard to do freehand by eyeball.

http://www.rockerarms.com/


Thanks for the link.
I'll have to give them a call when I'm ready.
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mikes2nd
Posted 2020-04-01 2:37 PM (#596338 - in reply to #596293)
Subject: Re: 325 Poly rocker arm resurfacing.


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couldn't you find new ones? low mileage?
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local2Ed
Posted 2020-04-04 3:27 PM (#596437 - in reply to #596338)
Subject: Re: 325 Poly rocker arm resurfacing.


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mikes2nd - 2020-04-01 2:37 PM

couldn't you find new ones? low mileage?


The places like Rock Auto and Napa that show they have them don't appear to be the correct one's for a 325 cuin. Poly engine.

I didn't post here looking for good used ones or contact Big "M" because I haven't been able to get to looking at all of them closely and getting an accurate count of what I need.

I haven't called the above link yet.
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local2Ed
Posted 2020-06-08 6:09 PM (#599429 - in reply to #596293)
Subject: Re: 325 Poly rocker arm resurfacing.


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I found a machine shop that has the correct fixture to hold the rocker arms in the correct position, as stated in 57 Chizlers post above. I only had two that showed wear but let them touch up all of them.
They also cleaned and polished the shafts, sized the rocker arms. What was difficult to remove the rocker arms off the shafts is now sliding on perfect.
The cost for both shafts and 16 rocker arms done was $216.00.
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