Harland Sharp guys.... inside please
Thread Starter
Staging Lane
Joined: Mar 2004
Posts: 79
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Harland Sharp guys.... inside please Hey all....
Had heads & cam put on my '99 Z28 last night by my local F-Body performance shop. They have not done a set of HS rockers before, but have done many others.
I have the 1.7 non-adjustable's. I though they'd be a nice upgrade from stock. They were not able to see any clearance/ interference issues. The preload was perfect. They went right on no problem.
However, they are noisy noisy noisy....
So noisy in fact, that they put back my stock ones. After the swap, all was quiet again. He said the only noise after the swap was the sound coming out of the exhaust, not the motor
. They didnt want me to pick up my car tonight and say "Why'd you break my car?"
Theyre stumped... I paid a few hundred bucks for them and now I'm not sure what to do
The stock one's have almost 80,000 on them. I was afraid with the higher RPM the motor will see, that I may drop needle bearings. I was gonna do a set of new stock replacemants but when researching before purchase, the guys who put on HS's didnt mention any excessive noise and beyond MAYBE having to grind the outermost rockers, they seemed like the ticket.
My guy even offered to put only the center rockers back on this morning to see if it was a clearance issue with the outermost ones. But wouldnt they have seen the clearance issue while bumping the motor over with the valve covers off? They said there was none. And I don't think there should be an issue with valve cover interference with '99 and up style valve covers.
Comments? Thoughts?
Thanks,
Glenn
Had heads & cam put on my '99 Z28 last night by my local F-Body performance shop. They have not done a set of HS rockers before, but have done many others.
I have the 1.7 non-adjustable's. I though they'd be a nice upgrade from stock. They were not able to see any clearance/ interference issues. The preload was perfect. They went right on no problem.
However, they are noisy noisy noisy....
So noisy in fact, that they put back my stock ones. After the swap, all was quiet again. He said the only noise after the swap was the sound coming out of the exhaust, not the motor
. They didnt want me to pick up my car tonight and say "Why'd you break my car?"Theyre stumped... I paid a few hundred bucks for them and now I'm not sure what to do
The stock one's have almost 80,000 on them. I was afraid with the higher RPM the motor will see, that I may drop needle bearings. I was gonna do a set of new stock replacemants but when researching before purchase, the guys who put on HS's didnt mention any excessive noise and beyond MAYBE having to grind the outermost rockers, they seemed like the ticket.
My guy even offered to put only the center rockers back on this morning to see if it was a clearance issue with the outermost ones. But wouldnt they have seen the clearance issue while bumping the motor over with the valve covers off? They said there was none. And I don't think there should be an issue with valve cover interference with '99 and up style valve covers.
Comments? Thoughts?
Thanks,
Glenn
I use Harland Sharps with Comp R lifters. Took me a few trys to get the preload set correctly. They were a little noisy until I got the preload figured out. My heads are cut .030 and I run shorter pushrods and I ended up using a shim to get it all set. Another thing I did was completely clean the rockers with mineral spirits then soaked them in a coffee can full of oil. That way they are not 'dry' during the initial startup.
Any full roller rocker is going to be more noisy that the stockers but it should sound like a quiet sewing machine when it is all set right. Bigger cams cause the valvetrain to be more noisy also.
Any full roller rocker is going to be more noisy that the stockers but it should sound like a quiet sewing machine when it is all set right. Bigger cams cause the valvetrain to be more noisy also.
Thread Starter
Staging Lane
Joined: Mar 2004
Posts: 79
Likes: 0
Originally Posted by NO CATZZ
I use Harland Sharps with Comp R lifters. Took me a few trys to get the preload set correctly. They were a little noisy until I got the preload figured out. My heads are cut .030 and I run shorter pushrods and I ended up using a shim to get it all set. Another thing I did was completely clean the rockers with mineral spirits then soaked them in a coffee can full of oil. That way they are not 'dry' during the initial startup.
Any full roller rocker is going to be more noisy that the stockers but it should sound like a quiet sewing machine when it is all set right. Bigger cams cause the valvetrain to be more noisy also.
Any full roller rocker is going to be more noisy that the stockers but it should sound like a quiet sewing machine when it is all set right. Bigger cams cause the valvetrain to be more noisy also.
The heads were only cut the minimum... .010 I think. I'm using a stock length pushrod, which was recommended for my setup.
The shop said the preload set up as expected.... I can't think of the exact procedure at the moment... you know... the "tighten to 22 ft lbs with less than x turns"...
From zero lash (rocker just dragging on the pushrod) it should be between 3/4 and 1 1/2 turns til you get 22LBS. Every setup is slightly different and should be checked to be sure.
Thanks Nate
Thanks Nate
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Thread Starter
Staging Lane
Joined: Mar 2004
Posts: 79
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Yes, 5.3 heads from TEA....
There were no clearance issues. Rockers did not hit the heads at all. Preload was set correctly to 22ft lbs.
I spoke to TEA and they said they've been direct bolt on replacements when they've used them. No grinding necessary. And they havent been excessively noisy.
I've already decided to just sell them and put on a set on new stock replacements. For Sale: HS 1.7 Rockers :-(
I got to listen to my car in person last night and the valve train is quieter now with the new heads and cam then with the stock stuff. It sounded really good. I think I must have had a lifter or 2 that were bad, causing some tick.
Thanks guys....
There were no clearance issues. Rockers did not hit the heads at all. Preload was set correctly to 22ft lbs.
I spoke to TEA and they said they've been direct bolt on replacements when they've used them. No grinding necessary. And they havent been excessively noisy.
I've already decided to just sell them and put on a set on new stock replacements. For Sale: HS 1.7 Rockers :-(
I got to listen to my car in person last night and the valve train is quieter now with the new heads and cam then with the stock stuff. It sounded really good. I think I must have had a lifter or 2 that were bad, causing some tick.
Thanks guys....
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Thread Starter
Staging Lane
Joined: Mar 2004
Posts: 79
Likes: 0
Originally Posted by White_Hawk
Don't the HS rockers require new pushrods? I thought their add in Hotrod this month actually says that. It sounds to me like you need some that are a little longer.
-Geoff
-Geoff
If the length was an issue, I doubt the shop would have been able to set up the preload correctly, which they were.
