Shims for rocker arms

• May 20, 2012

• #1

5.7 hemi

FBBO Gold Member

FBBO Gold Member

Local time

4:34 AM

Joined

Dec 21, 2008

Messages

17,588

Reaction score

19,324

Location

TEXAS

My dad is putting together a stroked 440 (505) and has a question on the shims for the rocker shaft/rockers. They fit over the shaft and we dont know where to use them. We know the big spacer goes between the rocker arms but the shims have stopped the build for the day. If you have pics that would help.

 

• May 20, 2012

• #2

5.7 hemi

FBBO Gold Member

FBBO Gold Member

Local time

4:34 AM

Joined

Dec 21, 2008

Messages

17,588

Reaction score

19,324

Location

TEXAS

So no one knows what the shims on the rocker shaft are for? Looks like I'll be doing more diggin' on the net.

 

• May 20, 2012

• #3

I

IQ52

Well-Known Member

Local time

3:34 AM

Joined

Aug 2, 2011

Messages

1,824

Reaction score

2,540

Location

Idaho

Which rocker system are you using? The thinner spacers are used to center the rockers over the valve tip and to keep the rocker from riding directly against the holddown clamp..

 

• May 20, 2012

• #4

'67Satellite

Well-Known Member

Local time

5:34 AM

Joined

Jun 16, 2011

Messages

636

Reaction score

146

Location

Southern California

I tried to post some pictures but it's not letting me. Anyway, mine came with a few different thicknesses and i set up each rocker individually to get it centered on the valve stem and get the end play nearest zero i could, without interference.

 

• May 20, 2012

• #5

5.7 hemi

FBBO Gold Member

FBBO Gold Member

Local time

4:34 AM

Joined

Dec 21, 2008

Messages

17,588

Reaction score

19,324

Location

TEXAS

Thanks fella's, you guys confirmed what I found.

 

• May 20, 2012

• #6

Satellite65

Well-Known Member

Local time

5:34 AM

Joined

Aug 22, 2010

Messages

480

Reaction score

10

Location

Long Island NY

Are you taliking about the shims that go underneath the rocker shafts between the shafts and the pedestals? Those are used to raise the entire rocker shaft assembly to correct for valve train geometry problems. Centers the rocker arm over the valve tip in forward/aft position as opposed to the spacers between the rocker arms, which center them in the side-to-side position.

 

• May 20, 2012

• #7

3

383man

Well-Known Member

Local time

4:34 AM

Joined

Jul 19, 2008

Messages

4,794

Reaction score

3,664

Location

Md

This is the only pic I have of my rocker shafts on my 440 based 493. These are Hughes rocker arms and shafts. The spacers are all from Hughes also. Ron

 

• May 20, 2012

• #8

5.7 hemi

FBBO Gold Member

FBBO Gold Member

Local time

4:34 AM

Joined

Dec 21, 2008

Messages

17,588

Reaction score

19,324

Location

TEXAS

I'm talking about the round shims that fit around the rocker shaft.

 

• May 20, 2012

• #9

69Bee

FBBO Gold Member

FBBO Gold Member

Local time

2:34 AM

Joined

Nov 17, 2009

Messages

4,400

Reaction score

4,391

Location

Whetstone, AZ

thin-L-ring-R-wide-L-ring-R-thin-L-ring-R-wide-L-ring-R-thin

thin = thin spacer
wide = wide spacer and long bolt
R = right rocker arm
L = left rocker arm
ring = circular rings

 

Last edited: May 21, 2012