Re: Rocker arms hold down kit and side play
[Re: Stanton]
#1352692
12/21/12 09:35 AM
12/21/12 09:35 AM
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Joined: Nov 2004
Posts: 340 Vitoria, Spain
Coke
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Quote:
Whatever you do, you want at least one shim between the rocker and the holddown to eliminate wear. You should also find that the spacing is equal for each pair of rockers and that once you find the combo, each set will have the same shim config. (the valves all have the same spacing as do the pedestal bolts). The holes in the holddowns are also usually large enough to allow some movement.
When I assemble mine I cut 2 .015 shims in half and used a half on each pair of rockers as I tightened the holddowns. When I reached the right torgue I took them out - VOILA, each set with very close to the same clearance.
Sounds like a very good idea so i cut two 0.015 shims and i,m doing the same. The only thing is that i had to remove two of the 0.015 whole shims that i had between the rockers and the spacers to allow one half shims on every couple of rockers.Huges recommends 0.005 to 0.015 side play, but being aluminium rockers,don,t like too much less than 0.015".
About the wear between the rocker and the hold down ,this kit come with a wide washers (0.122" or so) wich must go between the rocker and the holddown .You can add a shim for centering the rocker but you can,t remove this washer from that place.
Last edited by Coke; 12/21/12 09:36 AM.
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Re: Rocker arms hold down kit and side play
[Re: Cab_Burge]
#1352694
12/21/12 05:56 PM
12/21/12 05:56 PM
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Joined: Oct 2005
Posts: 8,873 Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,873
Ontario, Canada
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Quote:
About the wear between the rocker and the hold down ,this kit come with a wide washers (0.122" or so) wich must go between the rocker and the holddown
Really !?!?! Can you tell me which kit you bought. All the holddowns I've seen are wide enough that a .120 spacer would never go between the holddown and rocker!
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Re: Rocker arms hold down kit and side play
[Re: Stanton]
#1352695
12/22/12 06:08 PM
12/22/12 06:08 PM
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Joined: Nov 2004
Posts: 340 Vitoria, Spain
Coke
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OP
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Joined: Nov 2004
Posts: 340
Vitoria, Spain
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Quote:
Quote:
About the wear between the rocker and the hold down ,this kit come with a wide washers (0.122" or so) wich must go between the rocker and the holddown
Really !?!?! Can you tell me which kit you bought. All the holddowns I've seen are wide enough that a .120 spacer would never go between the holddown and rocker!
That is rare,cause the holddowns are Mopar Performance(#P5249714)and the rockers arm kit is from Hughes Engines and everything seems to be made for fitting .
I have taken a few pics.
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Re: Rocker arms hold down kit and side play
[Re: Coke]
#1352696
12/22/12 11:22 PM
12/22/12 11:22 PM
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Joined: Aug 2005
Posts: 4,799 ILL
MLR426
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master
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Posts: 4,799
ILL
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Quote:
Quote:
Quote:
About the wear between the rocker and the hold down ,this kit come with a wide washers (0.122" or so) wich must go between the rocker and the holddown
Really !?!?! Can you tell me which kit you bought. All the holddowns I've seen are wide enough that a .120 spacer would never go between the holddown and rocker!
That is rare,cause the holddowns are Mopar Performance(#P5249714)and the rockers arm kit is from Hughes Engines and everything seems to be made for fitting .
I have taken a few pics.
I've used that rocker system a few times and they are nice pieces. Be sure to check rocker to retainer clearance and clearance under rocker if needed.
MLR426
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Re: Rocker arms hold down kit and side play
[Re: fourgearsavoy]
#1352699
12/23/12 09:16 AM
12/23/12 09:16 AM
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Joined: Nov 2004
Posts: 340 Vitoria, Spain
Coke
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Wow! That before picture is very exagerated.I suppouse that kind of rockers are harder to center.
However ,what do you guys do for determining that it is correctly side centered? I mean on roller tip rockers.
Mine seems to be ok and i haven,t done anything.The valve stem is in the center of the roller tip,it can vary the 0.015 of side clearance,of course.
I use a magnifing glass to check it and seems to be ok.I don,t know any other method for this... Besides, in the Hughes instructions sheet,they say that centering is not mandatory and sometimes some offset can be allowed.
Last edited by Coke; 12/23/12 09:26 AM.
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Re: Rocker arms hold down kit and side play
[Re: Coke]
#1352700
12/23/12 01:47 PM
12/23/12 01:47 PM
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Joined: Dec 2004
Posts: 10,554 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
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Posts: 10,554
Rittman Ohio
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Yours are probably pretty close out of the box and may only need a small amount of shims to get it right.You can eyeball it to get it as close as you can.I am concerned about one thing in your original post though Did I read it right that the clearance changes when you tighten the hold downs? That is something you need to address before you go any further If it's not too late I would exchange the MP units for the Hugh's hold down kit with studs With aluminum heads rocker shaft studs are a better option. Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: Rocker arms hold down kit and side play
[Re: fourgearsavoy]
#1352703
12/23/12 06:06 PM
12/23/12 06:06 PM
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Joined: Nov 2004
Posts: 340 Vitoria, Spain
Coke
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Vitoria, Spain
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I think that i didn,t explain it very well I did mean that it changes depending how you tight the hold down because it can be moved side by side BEFORE to thight them,so you can vary the side play a lot. About the studs,i have been checking the Hughes page and they seem to be similar to the valve train parts that my old 906 heads had. [image] [/image] Using the hughes rockers i would need something to keep the distance between these and the studs.
Last edited by Coke; 12/23/12 06:23 PM.
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Re: Rocker arms hold down kit and side play
[Re: BSB67]
#1352707
12/24/12 12:18 AM
12/24/12 12:18 AM
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Joined: Dec 2004
Posts: 10,554 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
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Posts: 10,554
Rittman Ohio
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Yeah I scored a set of early 70's hardened pad rockers in a trade for some tranny work I done I sent them to RAS to correct them and have new bushings and hardware.I got them back and still had to have them machined even more.Good thing I got them for next to nothing because I have about 5 bills in them with the holddowns and shafts If I was doing it over again I would go with the HS rockers from Mancini with the bushings instead of the rollers Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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