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Re: Rocker arm spacers/shims-who uses them? [Re: ahy] #2106247 07/08/16 01:03 PM 07/08/16 01:03 PM
Joined: Jan 2003 Posts: 1,123 State, country, etc. G gss OP super stock
gss OP super stock G Joined: Jan 2003 Posts: 1,123 State, country, etc.	Originally Posted By ahy On my BB, the hold downs needed milled then shims to get the rocker tips and valves lined up just right. It is very likely your will need the same. Suggest you take a little extra off the hold downs to give clearance for alignment then use the shims. I got the shims from Mancini. Yes I have done that. They are all set at 0.012 now and aligned with valves. Seems a little tight. As ccdave mentioned, he goes 0.030-0.040. I think I will stick with the 0.012" as some of the pushrods are pretty close to rubbing. I don't want thing moving around too much.

Re: Rocker arm spacers/shims-who uses them? [Re: jbc426] #2106254 07/08/16 01:23 PM 07/08/16 01:23 PM
Joined: Mar 2007 Posts: 3,328 West Coast, USA jbc426 master
jbc426 master Joined: Mar 2007 Posts: 3,328 West Coast, USA	Originally Posted By jbc426 Originally Posted By gss I can grind my shaft hold-downs to provide the proper clearance to the rocker arms. Should I go further and make room for some .015 or .030 shims? This is a big block with Edelbrock heads and Comp steel rockers. I am using the billet hold-downs from Hughes but I think they are made by Edelbrock also. Got the stud kit as well. Any tips or tricks to dressing the hold-downs? I am going to finish the sides with 400/600/1000 grit after grinding them to the proper dimension. Maybe bevel the corners slightly so they don't dig into the rocker arms? I took the pushrods out so the shafts would sit on the heads without tightening down the hold-downs to make fitment easier. It looks like it will be interesting getting the nuts started on the studs with the pushrods in place. Is that ever a problem? Thanks! I like the one piece fitted spacers T&D uses. I've had the thin shims come apart and end up in the oil pools in the heads. They must have worn through, broken up and ended up in small bits in the motor. This was with clearance measured and adjusted using the thin shims. No bueno. Disregard this. The problem was elsewhere. 1970 Plymouth 'Cuda #'s 440-6(Stock drivetrain in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's & EFI. 1968 Plymouth Barracuda Convertible Paxton Boosted 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 3.91's (closest thing to an automatic 5 speed going)

Re: Rocker arm spacers/shims-who uses them? [Re: gss] #2106316 07/08/16 04:05 PM 07/08/16 04:05 PM
Joined: Jan 2003 Posts: 1,807 Mopar Country, Mi ccdave The Ultimate
ccdave The Ultimate Joined: Jan 2003 Posts: 1,807 Mopar Country, Mi	I would loosen them up to .015 at a minimum..

Re: Rocker arm spacers/shims-who uses them? [Re: ccdave] #2106341 07/08/16 04:49 PM 07/08/16 04:49 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Originally Posted By ccdave I would loosen them up to .015 at a minimum.. On the single shaft system I never had any issues at .015 for each pair... I run the single shaft on my econo W-2s which are TD rockers... luckily they line up very well but I wanted shims between all the alum on them so a little milling on the hold downs it ended up with .015 clearance.. the rockers touch the nylon spacers which to me would wear.. I didnt like that and I had to cut a couple of the spacers... .015 shims and .015 clearance.. this is how they were without changes but on my first set of them the spacers never really wore Last edited by MR_P_BODY; 07/08/16 04:50 PM.

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