oiling failure ?

[Nacho-RT74]

what could cause a lack of oiling on front cilinders area at rocker shafts ?

the cilinders 1 and 2 rockers began to fail, and I got a charcoal layer al around, from burnt oil.

[elacruze]

plugged rocker shaft holes, or low oil pressure.

[metalstorm440]

You can prime the system and check the flow to that area and i think you can remove the rocker shafts and put a coat hanger in the rocker stand and check for blockage down to the cam hole and blow air in there also.
ps: maybe the cam baring moved and closed the hole some or all the way.

[firefighter3931]

ps: maybe the cam baring moved and closed the hole some or all the way.

That's a good theory and the same thing i'm thinking....the #4 cam bearing has shifted and partially closed off the oil supply. Coincidentaly, the 2 most affected cylinders are also the two furthest away from the top end oil supply. 


Ron

[Nacho-RT74]

yeap, I'm aware of that's the last area to get oil.

[Nacho-RT74]

what about the lifter fails making the oil not reach enough to the rockers ?

[metalstorm440]

what about the lifter fails making the oil not reach enough to the rockers ?

And that area would effect what?:Both ends of the pushrod and the contact area and the pushrod would be shorter,discolored and the rocker likely to have a hole in it fast from no oil.The valve springs will get weaker also from more heat.

[BSB67]

what could cause a lack of oiling on front cilinders area at rocker shafts ?

the cilinders 1 and 2 rockers began to fail, and I got a charcoal layer al around, from burnt oil.

Show pictures please.  Is anything turning blue?  If so, exactly where. 

[Nacho-RT74]

nothing blue, just the rockers bushings getting worn, then with play on rocker shaft now. Rockers got some of the brass from the bushing.

No pics, sorry, I had to reassembly the car. Readjusted everything with the new rocker play temporally

it looks logic now the lower PSI on cilinders 1 and 2, right ? ( do you remember my PSI readings BSB67  ? ) maybe they were opening later  and closing earlier and with less duration due a bigger play with rocker

worried now if the camshaft bearing moved

[Nacho-RT74]

what about the lifter fails making the oil not reach enough to the rockers ?

And that area would effect what?:Both ends of the pushrod and the contact area and the pushrod would be shorter,discolored and the rocker likely to have a hole in it fast from no oil.The valve springs will get weaker also from more heat.

Dumping out part of the oil pressure maybe ?

but I never have got less than half of gauge reading though

[BSB67]

it looks logic now the lower PSI on cilinders 1 and 2, right ? ( do you remember my PSI readings BSB67  ? ) maybe they were opening later  and closing earlier and with less duration due a bigger play with rocker

That would create higher cylinder pressure.

[Nacho-RT74]

really?