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post #1 of 14 (permalink) Old 11-22-2006, 01:31 AM Thread Starter
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adjusting valves

does anyone know how to adjust valves, i need to do this soon on my new motor and also do the rockers again. any play by play instructional is appreciated.


thanks in advance!!!

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post #2 of 14 (permalink) Old 11-22-2006, 05:48 AM
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do you have stock rockers? if so there is no adjustment except for aftermarket shims but those aren't needed unless you had more than .010 shaved off your heads.
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post #3 of 14 (permalink) Old 11-22-2006, 11:08 AM Thread Starter
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i have aftermarket 1.73's and my heads were P/P by SSM.

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post #4 of 14 (permalink) Old 11-22-2006, 01:19 PM
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are they adjustable RR's by harland sharp or Non-Adjustable.

Brad
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post #5 of 14 (permalink) Old 11-22-2006, 04:45 PM Thread Starter
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there from SCP. they say they are non adjustable but there noisy. here's the link.

http://supercoupeperformance.com/par...px?category=54

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post #6 of 14 (permalink) Old 11-22-2006, 08:18 PM
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Yeah if I was you I'd probably get used to that noise. All the rockers sold for the 3.8/4.2 are all based off the 351C rockers and of of the wrong geometry for the engine (arent yah glad they told yah that when yah bought em!)

Anywho,, I to am one of the ones who was fooled so dont feel bad.. its kinda the reason I'm on a crusade to find a better rocker.

If you are using a reground cam and those rockers the pushrod legnth is most likely wrong.

what you want to do is get the rocker tip to move as lil as possible threw rest and full lift positions. this of course takes time and trial and error.

What you need is a adjustable pushrod and a series of shims.
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post #7 of 14 (permalink) Old 11-22-2006, 08:22 PM
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post #8 of 14 (permalink) Old 12-02-2006, 06:43 PM
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Comp Cams makes roller rockers specifically designed for the 3.8 now. The market is improving. I have the Harland Sharp roller rockers, which were one of the first on the market. I havent had any problems with them at all. But if you're using a reground cam you will need longer pushrods. Adjustable pushrods are meant for measurement purposes only. I had to get mine off Summit because everyone around here carries Chevy length adjustable rods. And you can buy custom length pushrods off of Summit also. But if your cam was reground you wont need shims, you'll need longer pushrods.
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post #9 of 14 (permalink) Old 12-04-2006, 03:48 PM
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got the part number for the comp cams units?
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post #10 of 14 (permalink) Old 12-05-2006, 01:39 AM Thread Starter
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i think ill just get used to the sound!\

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post #11 of 14 (permalink) Old 01-12-2007, 01:00 AM Thread Starter
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ok the sound is getting annoying. whats the part number for the correct length pushrod?????

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post #12 of 14 (permalink) Old 01-12-2007, 11:58 AM
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unfortunetly,, there is no single part number,, pushrod length is different for every reground cam,, you need to figure out the proper valvtrain geometry with a adjustable pushrod and a solid lifter.

Its a pain in the arse and reground cams are so a waste of money,, I also learned the hard way. cant wait to get rid of my regrind.
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post #13 of 14 (permalink) Old 01-12-2007, 09:41 PM Thread Starter
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post #14 of 14 (permalink) Old 01-12-2007, 11:04 PM
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What I'm trying to say is that each reground cam has different measurments (duration/lift/etc) so if they reground a 207/215 cam off a stock cam then they remove a certain amount of material to achieve that...but if they ground a 224/232 then they have to remove more material.

there is no magical number that fixes all... pushrod legnth is a science/art so to speak. each motor is individual unless its a production motor then they machine everything the same.

You need to be able to mark the tip of the valve with a permanent marker and what your trying to achieve is the least amount of travel of the rocker accross the valve tip.

This saves the rocker from undo side loading and causing the valve guide to wear prematurely.

do a search on Google for ROCKER GEOMETRY and start readin
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