Finally, a nice, warm day in Atlanta! I used it to tie up some loose ends on projects from last year, and investigate a noisy something under the valve cover that has developed in the pas few weeks.



Now I have a adjuster screw wearing on #6 intake, which is the rocker on the left!







All three of my valvetrain related problems has been on the driver side head. Chuck is to blame for one of them. Oh well. I wish the new stuff would stop breaking so I can focus more time on other areas.


Lawrenceville, GA

Charlie - What relationship does this adjuster have to the earlier pushrod cup problems? Same position or another?

 
 Steve Metzger       Tucson, Arizona

No relation I can tell other than having all occur on the same head. The first failure was #5 exhaust. The second was #8 exhaust. This one is #6 intake.


Lawrenceville, GA

I had the same problem with my roller rockers.It seems like my rockers  werent getting any oil.I ended up putting the roller rockers on the shelf and switched back to ECG rockers.Any body know why?I think the oil holes dont line up with the oil holes on the shaft?I remember an article in YBM that talked about modifying the shafts?,cant find the article.

55 fairlane gasser 312 /c4, 57 f100 292/c4, 52 mainline gasser 302/t10 4speed

They're getting oil. I made sure of that after the first failure.


Lawrenceville, GA

Nathan, ted showed that grinding angled slot on rocker shafts helped with oil flow to rockers. i had same problem as you and charlie and took them off also. best regards bill.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Here’s a link to a thread with a picture showing the rocker shaft mod.  This angled cut helps to align the groove in the rockers with the oil feed hole in the shaft.

http://www.y-blocksforever.com/forums/Topic10464-3-1.aspx

Lorena, Texas (South of Waco)

Charlie - Try to find find a machine shop that has a little "PTC Instruments" hardness tester - makes a punch mark and measures the scar diameter. Check a "good" adjuster" against a failed one on the hex flat - maybe you'll find them soft. If so use the tester to sort out the replacements - assuming you can get some... 

Without a PTC set-up handy - I've used a Browning spring loaded punch, a magnifier, and a small dial caliper.

This looks more like a hardness problem than a lubrication issue to me. Lube failures often result in "scoring" - your parts look polished.

 
 Steve Metzger       Tucson, Arizona

Thanx for the link.I remember reading about this problem,I even did the shaft mod just like in the article in YBM,but still had some oiling issues with the Dove set up.Thanx Ted for the articles and work on the Y.I ended up giving up on the roller rockers,from now on Ill stick to the stock style rockers.Is John still offering the Blue Thunder rockers?

55 fairlane gasser 312 /c4, 57 f100 292/c4, 52 mainline gasser 302/t10 4speed

Charlie - I had a 223 "six" rocker arm in my junk here at work - the Ford adjuster screw checks over 50 Rc (with the PTC).

The aftermarket arms ought to match that.........

 
 Steve Metzger       Tucson, Arizona