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Old 08-27-2005, 02:37 PM   #1
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Rocker arms wont stay tight

I have the comp cams pro magnum rocker arm and when I turn the engine over the ones that I just adjusted come right off the valve and pushrod but the nut is tight. What could be wrong?
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Old 08-27-2005, 04:11 PM   #2
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Re: Rocker arms wont stay tight

Lifters collapsed or your not adjusting them correctly.
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Old 08-27-2005, 04:41 PM   #3
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Re: Rocker arms wont stay tight

$hawn, I have done this may times, if you want I could stop by and see if I can help you figure out what the problem is. You still have my cell # right?
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Old 08-27-2005, 06:34 PM   #4
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Re: Rocker arms wont stay tight

Hears the deal, I put new heads and thinner head gaskets, so at first I used stock lenght pushrods, there too long but I had them adjusted fine, then I put some shorter pushrods in and the car woudnt stay running. Figured out that the rockers arent staying tight after I adjust them, I turn the motor over and the ones I did are real loose. The lifters I cant push in with the pushrods by hand so they seem to be pumped up, I think.
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Last edited by $hawn; 08-27-2005 at 06:39 PM.
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Old 08-27-2005, 06:40 PM   #5
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Re: Rocker arms wont stay tight

You should not change pushrod length unless you have determined that you need it to maintain proper geometry.
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Old 08-27-2005, 07:04 PM   #6
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Re: Rocker arms wont stay tight

Right, I used a pushrod lenght check, I didn't mean for it to sound as if I just put in some shorter ones laying around.
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Old 08-27-2005, 09:24 PM   #7
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Re: Rocker arms wont stay tight

Quote:
Originally Posted by $hawn
Right, I used a pushrod lenght check, I didn't mean for it to sound as if I just put in some shorter ones laying around.
Good. It's always helpful to have all the info.
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Old 08-28-2005, 07:43 AM   #8
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Re: Rocker arms wont stay tight

What's the part number of the rockers you used?
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Old 08-28-2005, 09:04 AM   #9
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Re: Rocker arms wont stay tight

The 1305, 1.6 7/16 non self aligning.
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Old 08-28-2005, 09:23 AM   #10
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Re: Rocker arms wont stay tight

I used the same ones. Did you get the guide plates? I had no issues with mine. You ought to have colin91Z come over and help you out.
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Old 08-28-2005, 06:18 PM   #11
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Re: Rocker arms wont stay tight

So do you have guide plates?
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Old 08-28-2005, 07:55 PM   #12
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Re: Rocker arms wont stay tight

Yes I have guide plates, once I pulled my head out of my butt, I got it, I think the problem was I didnt adjust some of them at tdc, and once I turned the motor over they were loose, but I got some help to watch the valves this morning and got it figured out.
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Old 08-29-2005, 02:19 PM   #13
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Re: Rocker arms wont stay tight

Not to beat a dead horse but you did get hardened pushrods to use with the guide plates didn't you?
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Old 08-29-2005, 10:54 PM   #14
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Re: Rocker arms wont stay tight

Yes sir.
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Old 08-30-2005, 06:42 AM   #15
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Re: Rocker arms wont stay tight

I understand that the standard SBC guide plates aren't properly spaced for LT1's and will cause the roller rocker to ride offcenter on the valve stem. The ones to use are the GMPP p/n 14011051.

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Old 08-30-2005, 06:42 AM
 
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