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Old 04-15-2017, 02:31 PM
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Thumbs down Metal in SBC question.

I was running the crappy rocker arms by proform and the locking nuts backed off. They basically gacked the hell out of the self aligning ridges and some of the actual arms. Do you think I should have to do a rebuild or just put a magnet plug in the oil pan? It was idling while I was trying to diagnose the noise so it was probably running like this for 5 minutes. Also revved it up 2 times to see if the noise was relative to the rpm. (If your wondering why it was running that long like that is because I could barely hear it with open headers.) I have pictures but my signal is bad where I'm at so I'll post later if you need then

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Old 04-15-2017, 05:31 PM
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You know you have chunks and slivers inside the motor, but you're hesitant to pull the motor apart and clean it? Okay, fine, let's just drive it until a chunk gets between the oil pump gears and let that make your decision for you. No problem.
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Old 04-16-2017, 01:20 AM
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Easiest solution is pull the engine, remove the intake and oil pan and clean out...check the oil pump pickup while your there.

You could do it halfway but thats a gamble.
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Old 04-16-2017, 06:40 AM
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TI and Chuck are correct - it should be torn down and it's a gamble if you don't.

If you're a gambler then stick a couple of rear end magnets on the oil pan, change the filter a couple of times in the next 200 miles and watch the oil pressure at idle when hot.

But more important in making this decision is the value of your motor. If it's a used $300 unit with some upgraded rockers, cam, intake and some eye candy chrome, then fine. But if was a recent full performance rebuild, then I'd be onto removal, disassembly and cleaning. The proof of the damage will be in the bearings - if they are not contaminated, then the cleaning will consist of some gaskets and your time.
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Old 04-16-2017, 06:52 AM
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if its aluminum?? magnets wont help...
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Old 04-16-2017, 07:21 AM
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Quote:
Originally Posted by JJLT1 View Post
if its aluminum?? magnets wont help...
I assumed it was the self aligning section, but good point, I wasn't thinking of the aluminum :/
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Old 04-16-2017, 10:14 AM
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I'd change the oil and not worry about it.
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Old 04-16-2017, 03:18 PM
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Does this change anyone's opinion or you guys still think it's too much?
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Old 04-16-2017, 03:27 PM
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Quote:
Originally Posted by JJLT1 View Post
if its aluminum?? magnets wont help...
If a chunk finds its way between the oil pump gears, it won't matter if it's unobtainium, there's gonna be a problem.
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Old 04-17-2017, 09:24 AM
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Quote:
Originally Posted by ICLUITCH View Post
I was running the crappy rocker arms by proform and the locking nuts backed off. They basically gacked the hell out of the self aligning ridges and some of the actual arms. Do you think I should have to do a rebuild or just put a magnet plug in the oil pan? It was idling while I was trying to diagnose the noise so it was probably running like this for 5 minutes. Also revved it up 2 times to see if the noise was relative to the rpm. (If your wondering why it was running that long like that is because I could barely hear it with open headers.) I have pictures but my signal is bad where I'm at so I'll post later if you need then

These would have used locking nuts that are a design where the outer nut is adjusted to set the lash. Then when held in that position with a wrench the inner Allen head screw is tightened to jam the nut and rocker stud together. This has two requirements to work properly:


1) The end of the rocker stud needs to be dressed to provide a flat surface for the Allen screw to set against, failure to do this will most always allow the set screw to loosen.


2) There is not a specified torque value for the set screw but what you can get with a T handle seems about right which would be about 10 inch pounds. The poly locks are made from high carbon steel they are easy to crack or bust, this is anybody's not just Pro Form.


Bogie
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Old 04-17-2017, 11:47 AM
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you have to ask yourself. DO I FEEL LUCKY.
I did a complete rebuild because of this. waste of money? maybe, maybe not


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Old 04-17-2017, 02:32 PM
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Check your valve locks. If there is not enough clearance, the locks will contact the self aligning aluminum rocker nubs and can wear them away. Ten degree valve locks can contact self aligning rocker rails. You can solve the ten degree lock problem by using recessed locks designed to fit lash caps but self aligning rocker arms cannot be used with lash caps.

The best self aligning roller rocker arms have valve stem aligning rails on the steel rollers, not on the aluminum rocker arms.

You should toss the self aligning aluminum roller rocker arms and use standard stamped steel self aligning rocker arms. The major advantage of roller rocker arms is they reduce side to side loading on the valve stem guides when you have high camshaft, more than .550" valve lift, I would consider using roller rocker arms. Self aligning rocker arms cannot be used with some valve spring retainers, if the center of the retainer is recessed to much.

Last edited by MouseFink; 04-17-2017 at 02:46 PM.
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