Aluminum roller upgrade question

[chermik1999]

Guess I should be more vigilant. Enough said...case closed. Sell em and move on. And thats just Google AI..damn.

 

[Geoff 2]

Don't use Profail again!
Heli Coiling removes metal in a very stressed area of the rocker, leaving it 'thin'. I would not do it.

 

[Mopar Hunter]

I just have a tough time spending $1400CAD for rockers. If I could beef up the $400 ones to be better than new, worth a shot.

What about these?

Ductile Iron Adjustable Rocker Set - 1.5 Ratio

store.440source.com

 

[dvw]

Don't use Profail again!
Heli Coiling removes metal in a very stressed area of the rocker, leaving it 'thin'. I would not do it.

Tap drill for 3/8 x 24 is .328". For a 3/8 x 24 Helicoil is .390" Thats .031" material removal. I doubt if that would bother anything. At worst the rocker you already own breaks. What do you have to lose by trying?
Doug

 

[Cranky]

I've had aluminum (Crane gold, Mopar Performance blue) rockers on my street cars for over 20 years. Not daily drivers. But never an issue. If the adjuster was tight and the threads stripped there is a hardness issue. My racecar cracked a T&D rocker in the thread area last year. They had over 1100 runs at 810 psi open pressure. Bought them used in 2012.
Doug

I know some that have had very good results with aluminum but know some that haven't had good results. I've had good results with certain things that others didn't. It's a strange world....

 

[chermik1999]

Tap drill for 3/8 x 24 is .328". For a 3/8 x 24 Helicoil is .390" Thats .031" material removal. I doubt if that would bother anything. At worst the rocker you already own breaks. What do you have to lose by trying?
Doug

I agree. But the damaged one is beyond repair. I was more after future proofing, but how many times do I want to risk putting more aluminum debris in the system.. lol. There's lots of meat so thinning isn't really a problem i would think.

 

[chermik1999]

I guess going forward one has to spend the time to inspect every adjuster for looseness and binding before moving forward. As the AI said, be possibly prepared for a failure. So for a budget low lift build, maybe. But definitely not an all out race. If you spend the $$ for good parts, dont skimp on the rockers is the lesson.

 

[chermik1999]

You know. Im not as experienced as many on this forum are. Actually nieve enough to install parts straight up. But these last 2 builds have me really learning something.

The 440 went pretty good with the exception of 1 bad rocker adjuster. Did a helicoil and the rest went well.

As some of you were involved with this SB build from last year's posts, starting with a new head that had a core alignment shift drilling the oil galley to the rocker shaft. It was drilled into the water jacket. Then the repIacement heads had a few non sealing valves. Spent 2 weeks trying to figure it out. Finally one fellow insisted I check out the core shift. Some suggested tests and found it. Not after 5 qts of oil was in the floor, 2 sets of head gaskets and loads of frustration thinking I had a cracked block. Then the rocker issue.

With more experience I may have caught these things before they happened.

So bottom line. Today with the race to offer product at a cheaper price mostly from overseas, the money saved has to be spent in closer inspection and testing or pay more. The old days of a straight up cam installs are behind us. Unfortunately I had them all in 2 builds...lol. looking forward to better days ahead.

Thanks guys...been awesome support.