[mlstang]

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?

[Pig Muffin]

Originally Posted by mlstang

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.

[Sick467]

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.

[silver69]

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.

[.boB]

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.

[mlstang]

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.

[Lizer]

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.

[mlstang]

Thanks for the response. I,ll get new rockers.

[PaulS]

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: