What would cause this rocker arm damage?

Cheapskate207

The left one hangs a little lower

5 Year Member

Jan 12, 2020

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Feb 16, 2024

#1

• Feb 16, 2024

• #1

I have a set of crane golds that I took off my car. I didn’t set these up, they were on the car and adjusted when I bought it. A few years ago I was in the engine, saw the damage and replaced them. Yesterday I was cleaning the garage and came across them. It has me wondering, what would cause this damage? And are they junk?

 

KZGUNS

I can swing up to 11”

5 Year Member

Jul 23, 2018

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chardon, Ohio

Feb 16, 2024

#2

• Feb 16, 2024

• #2

Possibly the rocker stud is bent or crooked or valve stem.

 

Cheapskate207

The left one hangs a little lower

5 Year Member

Jan 12, 2020

761

541

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Maine

Feb 16, 2024

#3

• Feb 16, 2024

• #3

KZGUNS said:

Possibly the rocker stud is bent or crooked or valve stem.

Click to expand...

I should’ve mentioned they are pedestal mount.

 

KZGUNS

I can swing up to 11”

5 Year Member

Jul 23, 2018

1,002

588

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chardon, Ohio

Feb 16, 2024

#4

• Feb 16, 2024

• #4

Cheapskate207 said:

I should’ve mentioned they are pedestal mount.

Click to expand...

Something can still be out of alignment on that rocker/valve. Throw a good one on and rotate the engine and see if it walks the roller over to that same side. Hit the top of the valve with a sharpie and see how the contact patch looks. You sure those are designed to be pedestal mount?

 

Cheapskate207

The left one hangs a little lower

5 Year Member

Jan 12, 2020

761

541

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Maine

Feb 16, 2024

#5

• Feb 16, 2024

• #5

Yea they are pedestal mount. I did end up putting some other rockers arms on. At the time I shimmed them correctly, having a good contact patch, preload, etc. There were actually quite a few like this, though I can’t remember how many off the top of my head. Maybe the previous owner set the lash wrong?

 

manicmechanic007

5 Year Member

Sep 26, 2017

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Roy, Utah

Feb 17, 2024

#6

• Feb 17, 2024

• #6

Those aluminum rocker arms simply wear out
Crane are some of the better ones IMO

 

AeroCoupe

lube between the nut and the face. I know my lubes

Founding Member

Oct 28, 2001

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Claremore, OK

Feb 17, 2024

#7

• Feb 17, 2024

• #7

https://www.corral.net/threads/roller-eating-into-side-of-rocker-arm-source-of-clacking.572902/

Kato knows his stuff.

 

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