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Post by Deleted on Sept 3, 2009 16:58:30 GMT -5
I'm still figuring out these olds engines and have run into an issue. Normally on hydralic lifters you tighten nuts until the pushrod does not spin and then give it another half turn or so but some told me that on the olds engines you just torque them down(except he did not know the torque spec) and move on. I'm not sure what to believe but the half moon spacer in the rocker arm is bottoming out so the old half turn more routine is not working. Any engine experts out there?
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Post by RAM Z on Sept 3, 2009 17:58:12 GMT -5
There is a torque number on those rocker arm nuts. You get the valves in their closed position, and torque the nuts, something like 20lbs.
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Post by Big Mike on Sept 4, 2009 10:30:41 GMT -5
The CSM says 25 ft lbs for the rocker arm retainers, and 35 ft lbs for the rocker arm studs.. Of course the CSM doesn't cover 400's, but they do not make a difference between the 330 or the 425, the torque specs are for all V-8's so it's got to be in the ball park.
The CSM also states the same info as Jasen posted, always torque with the valves closed.
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Post by bubbasz1 on Sept 4, 2009 13:09:02 GMT -5
Tight would be sufficient if your like me and seldom use a torque wrench. Also Big Mike, is that little dig at the IRS telling us a story, not meaning to pry but usually when something like that comes around it is for a reason. Jeff  |
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Post by Deleted on Sept 4, 2009 13:14:50 GMT -5
if your running roller rockers then do exactly what you said. tighten whilst spinning the pushrod until it bottoms out and then give your polylock another 1/2-3/4 turn to get your lifter pre-load (about .020" i believe). stock ones i would probably just torque them, but sometimes that doesnt always work... i have never heard of anyone adjusting roller rockers with a hydraulic cam any other way...
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Post by bubbasz1 on Sept 4, 2009 20:18:44 GMT -5
Well, this is where I got a little overboard. My engine as a whole but when putting on the roller rockers on I brought the piston up on TDC on the compression stroke and adjusted the rocker to just a touch on the push-rod. Installed a dial indicator and adjusted another .025 into the hydraulic lifter and locked it down. I know a little overboard but what the hell, you know what they say, if you got them, you might as well smoke them. ;D
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Post by Deleted on Sept 4, 2009 21:01:33 GMT -5
Correct me if I'm wrong.
[MODIFIED] Just to clarify, those of you that have adjusted a preload on your rockers are using an adjustable valve train like in the Chevy. Meaning you have probably milled the rocker stud area on the head and redrilled the stud holes to 3/8" or 7/16".
[STOCK] While on the other hand those of you torquing your rocker studs are using the original stock studs that depend on the top of the valve stem to be at the correct height to achieve the correct preload when torque is applied.
I think that sums it up. BTW mine are modified by Mondello
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Post by Big Mike on Sept 4, 2009 21:07:36 GMT -5
Also Big Mike, is that little dig at the IRS telling us a story, not meaning to pry but usually when something like that comes around it is for a reason. So, it's like this. I don't do my own taxes, and before anyone gets one here and goes on about how easy it is, mine aren't and even if they were I still wouldn't do them.  I used the tax guy my Dad always used and back in 2004 he retired, sort of. He moved away and he still did y taxes by mail. Well it didn't work so well and my taxes got messed up in '04. I found a new person who did my redid my '04 taxes and the my '05 taxes and this person was just plain stupid and totally screwed them up. Then to make matters even worse, the knucklehead that handled my grandmother's estate screwed up and it required us to amend our 2001 -2002 taxes. Now things are really in the sh*%$r. So I just said to hell with taxes and didn't do them for '07 & '08. Well that didn't go over so well as you can imagine. So I have now been trying to get everything put together to finally once and for all get all my tax crap straightened out, but it has been a real PITA!  So hopefully in a matter of a few weeks it wil all be over, but until then, the picture speaks for itself. |
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Post by bubbasz1 on Sept 4, 2009 21:21:16 GMT -5
Yep just as I suspected, another happy customer of the IRS. I wish they would just put a straight tax on everybody, collect it from everybody and close the IRS doors for good. I've been lucky as far as they go so far, but I also have mine done, too deep for me to even want to fool with. H&R Block gets my money every year to handle them and that's one check (to H&R) that I don't mind writing.
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Post by Deleted on Sept 5, 2009 9:18:37 GMT -5
Also Big Mike, is that little dig at the IRS telling us a story, not meaning to pry but usually when something like that comes around it is for a reason. So, it's like this. I don't do my own taxes, and before anyone gets one here and goes on about how easy it is, mine aren't and even if they were I still wouldn't do them. I used the tax guy my Dad always used and back in 2004 he retired, sort of. He moved away and he still did y taxes by mail. Well it didn't work so well and my taxes got messed up in '04. I found a new person who did my redid my '04 taxes and the my '05 taxes and this person was just plain stupid and totally screwed them up. Then to make matters even worse, the knucklehead that handled my grandmother's estate screwed up and it required us to amend our 2001 -2002 taxes. Now things are really in the sh*%$r. So I just said to hell with taxes and didn't do them for '07 & '08. Well that didn't go over so well as you can imagine. So I have now been trying to get everything put together to finally once and for all get all my tax crap straightened out, but it has been a real PITA! So hopefully in a matter of a few weeks it wil all be over, but until then, the picture speaks for itself. I had the same situation from the late 80s to the early 90s. I hired the largest CPA firm I could find and they saved me $1000s. Ever since my taxes were straightened out I have used them until 2 years ago. Now I just use Liberty (it's a chain). I've even been audited in the early 80s. That wasn't fun. The first question they ask is what bank I use and what are the account numbers. When I left, I emptied the accounts and left $40. The took everything except for $15 which was required to keep the accounts open. So you see, they can steel your mortgage payment if you let them. |
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Post by Big Mike on Sept 5, 2009 11:47:22 GMT -5
 Not wanting to get the "Off Topic" police upset so this will be my last comment. But there is nothing worse than getting one of those IRS letters in the mail. Your heart rate and blood pressure goes up before you even open the darn thing! It just sucks.  I'm with you Jeff, I want a straight tax for everybody, period. It would work out so much better.  |
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Post by Deleted on Sept 7, 2009 11:40:52 GMT -5
Correct me if I'm wrong. [MODIFIED] Just to clarify, those of you that have adjusted a preload on your rockers are using an adjustable valve train line in the Chevy. Meaning you have probably milled the rocker stud area on the head and redrilled the stud holes to 3/8" or 7/16". [STOCK] While on the other hand those of you torquing your rocker studs are using the original stock studs that depend on the top of the valve stem to be at the correct height to achieve the correct preload when torque is applied. I think that sums it up. BTW mine are modified by Mondello Back 2 the valve train question... Yes, my heads are milled for the pushrod guides and I have them drilled and tapped for 7/16-14 studs. They are C heads. I have harland sharp 1.7 rockers and 9.800" manley 3/8 hardened pushrods. |
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