Gene;
Moroso makes a rocker arm oil deflector for stamped rocker arms, that mounts
on the
studs, that is designed to solve your problem and at less than $25, cheaper
than new
covers
Ed
Gene Halvorson wrote:
> Thanks to those who have sent me suggestions on troubleshooting my valve
> train problems on my big block chuby. I have not yet completed the
> diagnostic workup so there is more to come. However, I might add that the
> usual issues such as valve to piston clearance, spring bind, correct pushrod
> length for geometry are things I did when I assembled the motor. I have no
> reason to suspect a change, other than abnormally worn or broken part. And
> the motor has given me about 1500 miles of good use with numerous high rpm
>spins
> (after a lengthy break in period.)
>
>
>
> Now, the good doctor has found some new clues:
>
> 1. When I first pulled off the valve cover I
> smelled the inside of the cover. I didn't like the smell.
>
> 2. As I was looking at the valve train I noticed
> that the rocker that was completely off and the two that were either loose or
> had bent pushrods had nuts that were a different color than the rest.
> I used the nuts that came with the Competition Cams stamped steel roller
> rockers. They are kind of a anodized gold color. But those that had
> a problem were black.
>
> 3. Upon further inspection of the problem rockers I
> noticed there was a lot of black carbon deposit on the outside lower part of
>the
> rocker, around the area that the pivot ball is located. I was surprised to
> see carbon deposits on an engine that has so few miles on it.
>
> 4. Inspection of the pivot balls show galling and
> even discoloration of the matting surface of one rocker. It almost
> looks blue.
>
> 5. Oil up through the pushrods is not the
> problem. The last time I played with the lash while the engine was running
> and the covers were off it looked like I just dumped a quart of oil all over
>the
> engine compartment. I had to stop because the smoke was too thick to see
> through. Even with the clips on the rockers. And, I did check each
> and every rocker to make sure it was getting oil.
>
>
>
> By now the pieces of the puzzle were falling into place and I already
> suspected the source of the problem but I had to call Comp Cams and run it
> by them anyway. After I explained the symptoms and my observations the
> first question the guy asked me was "Are you running tall valve covers?"
>
>
>
> When I bought the engine it had on a set of chrome Edelbrock valve
> covers that are just a bit over stock height. That is what I
> still run. They're real purdy lookin! But sure enough, a closer look
> underneath reveals the lack of a drip rail.
>
>
>
> I agree with the Comp Cams guy when he says there isn't a problem
> at low speed but at continues high speed, the oil isn't flowing into the
>rocker
> cup but is getting flung off onto the cover and is running across the top and
> down the side. The springs are probably getting lots of oil but the pivot
> ball is not getting enough at high rpm. At least it's obvious that the
> rockers are not getting enough oil. And I don't think it's the fault of
> that Melling high volume pump. I don't use restrictor plugs as I would
> rather pump more oil for a few HP than have happen what is happening.
>
>
>
> Anyone have a set of valve covers for sale? I
> do!
>
> --- Gene Halvorson
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