civlant

So what exactly makes it bad advice? I'm not trying to be a dick here just looking for explanation of what makes it such a bad method to do. I'm not alone on this either. Several of the heads/cam swap guides for the LSx online use this method (so it's not just my opinion either). I'm not saying they're all correct just looking for why you guys think its so bad when it's been proven to work.

DeltaBravo

Thanks to all for the advice. Since it doesn't take much more effort, I will nudge the engine over 4 times for removal and 4 times for re-installation. I don't like to take chances, and the extra time is minimal.

Dennis

Eric D

Because someone writes something on the web even if it appears in more than one place on the web doesn’t mean it is correct or proper. Even here on this forum you will find miss information because someone has read something somewhere and shares it. They might even believe what they are posting is correct because they followed the bad advice and got away with it or at least thought they did. The Corvette Forum in my opinion has a lot of sharp people that will usually catch and correct miss information.

As far as the method you were promoting, I’ll just point out one of the main reasons for it being a bad idea, for the rest do a search on the forum to find the others. While tightening the rocker hold down bolt with the lifter on the nose (high lift part of the lobe) there is minimum thread engagement in comparison to having the lifter on the base circle. This causes excess loading on the threads in the head. It doesn’t take that much more effort to rotate the engine to allow torquing the bolts on the base circle as the manual tells you to do.

leadfoot4

Furthermore, the heads are aluminum, although I don't know for sure if the holes for the rockers are heli-coiled or not. If they aren't, that's a LOT of torque you're applying to an aluminum thread, which is VERY risky. It might be easier to just slam them ALL in and go back later and re-torque them, but the ill effects could be costly.

99 vett babycar

we get a lot of that here.

civlant

^What you guys are saying makes sense. I wonder if there have been any ill effects (I haven't seen any on here or tech over the past several years). I do like to visit over here occasionally since there's far more vette-specific stuff obviously but it seems like the knowledgeable people are not as common IMO compared with the other board or maybe you guys just get tired of correcting everyone! Thanks for the clarification about the rockers. I wonder if it would be worth it to loosen and retorque them since I'm in the middle of a clutch swap and can rotate the flywheel pretty easily.

Eric D

The issue really has nothing to do with achieving the proper torque value; it is the risk of damage that can occur while torquing the hold down bolt while on the nose of the cam. The procedures in the repair manual and the engine assembly plant are developed with more engineering deliberation than most people would ever imagine. There are risk assessment studies that are part of the procedure development. There are many ways to accomplish a task, knowing the best way with the least risk takes a lot of work but well worth the effort. Following the manuals procedures gives you that advantage with little loss of anything other than maybe a little time.

81c3

These are the same guys who tell manual transmission owners the transmission fluid is lifetime and theres no need to change it. It makes you scratch your head sometimes....

civlant

Actually no, but thanks for stereotyping me into that group of dumbasses.

81c3

You took that totally the wrong way. I meant the GM guys are the guys telling us not to change our tranny fluid, not you. I find it intersting that so much R&D can go into the installation procedure of a rocker arm, then the same intelligent guys can tell us manual transmission fluid never needs to be changed.

civlant

Lol - I see what you're saying. It is ironic that GM might put a lot of thought into one thing and then tell you something like that about the trans fluid.

lucky131969

What's ironic, is that you require no justification for doing something the wrong way, provided you are in good company......


450 sheep jump to their deaths in Turkey
ISTANBUL, Turkey (AP) — First one sheep jumped to its death. Then stunned Turkish shepherds, who had left the herd to graze while they had breakfast, watched as nearly 1,500 others followed, each leaping off the same cliff, Turkish media reported.

In the end, 450 dead animals lay on top of one another in a billowy white pile, the Aksam newspaper said. Those who jumped later were saved as the pile got higher and the fall more cushioned, Aksam reported.

"There's nothing we can do. They're all wasted," Nevzat Bayhan, a member of one of 26 families whose sheep were grazing together in the herd, was quoted as saying by Aksam.

The estimated loss to families in the town of Gevas, located in Van province in eastern Turkey, tops $100,000, a significant amount of money in a country where average GDP per head is around $2,700.

"Every family had an average of 20 sheep," Aksam quoted another villager, Abdullah Hazar as saying. "But now only a few families have sheep left. It's going to be hard for us."

civlant

I don't think most people know when a guide is telling them to do it the wrong way. If I had known there was a better (safer for the threads at least) way to torque down the rockers then I would have done so. I've already admitted that you guys are right - what more do you want?

0HinsonSuperCars

The LS6 rockers are the same. This works with LS1/LS2/LS3/LS6/LS7/LS9 rockers.

Nothing special required, just basic tools and a torque wrench.

Seth

rustyguns

0HinsonSuperCars

These are finally off back order! In stock ready to ship.

sean.b

yella terra's dont have this issue, do they? kind of torn on if i need YT's with a mild head/cam car or if this would suffice..

VerTigo456

0HinsonSuperCars

No they don't. The stock rockers work great.

Thanks
Seth

0HinsonSuperCars

Thanks for your orders!