1967 Mustang 289, Help with roller rockers - Ford Mustang Forum
 
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post #1 of 9 (permalink) Old 08-04-2010 Thread Starter
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1967 Mustang 289, Help with roller rockers

I have a 67 coupe with a rebuilt 289. I have about 2000 miles since rebuild. I have Pro form roller rockers that make to much noise for me. They have been adjusted and are a little better. Do the roller rockers just make noise or did I get the wrong ones, any suggestions?
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post #2 of 9 (permalink) Old 08-04-2010
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Quote:
Originally Posted by mlstang View Post
I have a 67 coupe with a rebuilt 289. I have about 2000 miles since rebuild. I have Pro form roller rockers that make to much noise for me. They have been adjusted and are a little better. Do the roller rockers just make noise or did I get the wrong ones, any suggestions?
they should have 0 valve lash which means there is always contact somewhere and there should not be any noise.

1968, 302 .030 / Comp Cams Magnum 270h #31-414-3 501 lift @ .050 dur 224/224
Comp Cams Magnum Lifters and Pushrods Comp Cams 1.6 Full Roller Rockers
Edelbrock RPM heads (2.02 / 1.60) / RPM Air Gap
Holley Street Avenger 670 carb
Edelbrock 110gph Fuel Pump
Cloyes Street True Roller Timing Chain / Professional Products Harmonic Balancer
MSD Pro billet Dizzy, 6AL Box, Blaster 2 Coil
Flowtech Long Tube Headers
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post #3 of 9 (permalink) Old 08-04-2010
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I am assuming they are making the traditional tapping noise that comes from rockers that are NOT tightened down enough. Make sure your studs are not pulling out from the head, which would act like a rocker not tightened enough. Also make sure the roller tip is centered (both ways) on the valve stem. Close is good, noise is not likely to accurr from being off center unless it's very close to the edge. This problem would be from the wrong size pushrods and/or the wrong rockers. Make sure the rockers where installed correctly. I know that some can be installed with the pivot section turned 180 out.

Ride On,
Noel

"I'll fix it or break it, Guaranteed!"
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post #4 of 9 (permalink) Old 08-04-2010
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go to the comp cams website and you can read thier tech notes on how to properly adjust the valve lash if that does not fix it you probably have a weak lifter or too strong of a valvespring.
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post #5 of 9 (permalink) Old 08-04-2010
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Cheaper roller rocker arms (like Pro-Form) tend to be noisy. I don't know why, they just are. As I see it you have three choices.

1. Live with it. Turn up the stereo.

2. Replace with comp cams steel magnum rockers.

3. Install a thicker cast alum rocker cover.

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post #6 of 9 (permalink) Old 08-04-2010 Thread Starter
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Thanks for the response I forgot to mention that they get louder after the engine is up to operating temp if that means anything. Starts out sort of quiet.
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post #7 of 9 (permalink) Old 08-05-2010
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I'm not trying to be snide, but most of the problem is your roller rockers being Pro Form. They are notorious for being noisy and many problems are associated with them. If you search around on the internet you'll see what I'm talking about. In fact, the company that built my long block refuses to use Pro Form parts, and if a customer insists, they will not warranty that engine (they normally have a 70,000 mile/7 yr warranty).

If you want an affordable, full-roller rocker, I'd suggest looking at Scorpion. They are a little cheaper than the others but are still recognized as a quality product.
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post #8 of 9 (permalink) Old 08-05-2010 Thread Starter
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Thanks for the response. I,ll get new rockers.
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post #9 of 9 (permalink) Old 08-05-2010
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Just mail me the Proform rockers....
They either need press-in studs or good locks on the adjuster nuts. There is nothing in the rockers to make noise.
send them to:

1966 Coupe
351W
Top Loader
rebuilt, rewired, modified for slalom and hill climb
No racing - just a fun car built by and for me.
Project in process
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