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Old 05-10-2003, 11:02 PM   #1 (permalink)
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Installing pushrod guide plates

I need to install a set of pushrod guide plates on my C9TE 302 heads. I think that I will be using a set of plates made by Crane, out of Summit. Will I need any type of machine work done to the heads, in order to install them? The heads have already been tapped for screw in studs. Is there any advantage to the "raised" type as opposed to the normal kind?
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Old 05-11-2003, 06:06 AM   #2 (permalink)
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Installing pushrod guide plates

In most cases you have to machine the mounts down at least the thickness of the plates. What happens is the thickness of the plates plus the bolt head thats on the stud make it tight to bolt down the rocker. The rocker will bind on the taper just before the bolt when you go to install the rockers. So you have to lower the whole assembly to get the proper clearance under the rocker.

Hope I said this right I just got up.

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Old 05-11-2003, 07:59 AM   #3 (permalink)
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Installing pushrod guide plates

When i do the screw in stud and guide plate job on frod heads i mill .25 off the pad and have never had any complants. nHave done several this way.
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Old 05-11-2003, 05:19 PM   #4 (permalink)
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Installing pushrod guide plates

Just so I am clear on this..Must I shave off some metal on the head itself, to compensate for the thickness of the screw in stud's "nut" or whatever its called thickness? This is so that the stud doesnt sit too high? Is this right?
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Old 05-11-2003, 06:16 PM   #5 (permalink)
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Installing pushrod guide plates

Each boss that holds a screw in stud needs to be milled down .25 of an inch or just a little over 6mm. Not the deck face.
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Old 05-12-2003, 12:14 AM   #6 (permalink)
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Installing pushrod guide plates

Thanks, I just wanted to be sure...Oh one other thing, how exactly do O.E.M. heads keep the pushrods centered on the rockerarm, without the use of guide plates? I understand that the older heads like my 65 289's were slotted, so you didnt need guideplates. But before these 69 heads were tapped out for studs, they just have a round hole. Wouldnt this let the pushrod move all over the place. Am I missing something?
And earlier I made a comment about cutting down for the thickness for the "nut" or whatever. I should have said the thickness of the guideplate. My brain must have shut down, making me come up with that stupid line of reasoning.

[ This Message was edited by: BBCFORD on 5/12/03 12:18pm ]
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Old 05-12-2003, 02:17 AM   #7 (permalink)
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Installing pushrod guide plates

Quote:
On 2003-05-12 00:14, BBCFORD wrote:
Thanks, I just wanted to be sure...Oh one other thing, how exactly do O.E.M. heads keep the pushrods centered on the rockerarm, without the use of guide plates? I understand that the older heads like my 65 289's were slotted, so you didnt need guideplates. But before these 69 heads were tapped out for studs, they just have a round hole. Wouldnt this let the pushrod move all over the place. Am I missing something?
And earlier I made a comment about cutting down for the thickness for the "nut" or whatever. I should have said the thickness of the guideplate. My brain must have shut down, making me come up with that stupid line of reasoning.

[ This Message was edited by: BBCFORD on 5/12/03 12:18pm ]


early heads use what is called a "rail type" rocker arm. The tip of the rocker has two "edges" or rails, that surround the valve stem, keeping the rocker inline, and hence limiting pushrod side-to-side movement.
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Old 07-27-2009, 08:45 AM   #8 (permalink)
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Re: Installing pushrod guide plates

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Originally Posted by coolfalcon View Post
Each boss that holds a screw in stud needs to be milled down .25 of an inch or just a little over 6mm. Not the deck face.
What studs are you refeering?...

Ive got non roller rocker arms for 3/8" diameter studs. Because of this Ive purchased to Summit, an ARP 134-7101 (3/8" Chevy set), instead of 134-7104 (3/8" roller rockers SB Ford) or 100-7101 (7/16" SB Ford).

http://img195.imageshack.us/img195/8646/arpr.jpg

I think If I mill down .25 of an inch, the top of stud remains very down. What do you think about this?

Please, I live in Argentina where SB Ford was not made. There arent parts, here.

Thanks in advance!

Guillermo
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Old 07-27-2009, 10:58 AM   #9 (permalink)
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Re: Installing pushrod guide plates

first the chevy rockers are wrong . why buy the chevy when the Ford part was there ? once the pressed in studs are removed , Tap them , use a 7/16 UNC bolt to mock it up , this will show how much that has to be milled
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Old 07-27-2009, 12:30 PM   #10 (permalink)
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Re: Installing pushrod guide plates

Dan he just bought rocker stud for chevy. Not Rockers .
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Old 07-27-2009, 02:46 PM   #11 (permalink)
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Re: Installing pushrod guide plates

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Originally Posted by DanH View Post
first the chevy rockers are wrong . why buy the chevy when the Ford part was there ? once the pressed in studs are removed , Tap them , use a 7/16 UNC bolt to mock it up , this will show how much that has to be milled
I bought Chevy studs because the Ford option was 7/16" non roller rockers or 3/8" roller rockers, while Chevy studs was 3/8" non roller rockers, but there are a little short.
Ive got stock Ford non rail rockers to install in D8OE heads, which had fulcrum non adjusting rockers.

My question is how much I mill the pedestal to install guideplates, using Chevy studs instead of Ford studs.

Thank You!
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Old 07-27-2009, 06:21 PM   #12 (permalink)
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Re: Installing pushrod guide plates

Post is 2003?
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Old 07-27-2009, 06:42 PM   #13 (permalink)
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Re: Installing pushrod guide plates

SO ? Just shows me Tang did some homework and searched for what he/she wanted info/help with . Old post do get brought back up from time to time . I wish I knew the answer for him/her but I don't .. sorry Tang .
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Old 07-28-2009, 07:40 AM   #14 (permalink)
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Re: Installing pushrod guide plates

OK! Thank you!
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Old 07-28-2009, 08:48 AM   #15 (permalink)
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Re: Installing pushrod guide plates

Quote:
Originally Posted by tang302 View Post
I bought Chevy studs because the Ford option was 7/16" non roller rockers or 3/8" roller rockers, while Chevy studs was 3/8" non roller rockers, but there are a little short.
Ive got stock Ford non rail rockers to install in D8OE heads, which had fulcrum non adjusting rockers.

My question is how much I mill the pedestal to install guideplates, using Chevy studs instead of Ford studs.

Thank You!
lets start by the rockers that will be used . if stock you got a problem with 3/8 studs
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