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756puller

D282

8 posts in this topic

I've got a 706 with a282 engine I've had apart a few times for scoring valve guides. I installed a new oil pump and have 35 psi oil pressure. I can get the oil up to the rocker arms but it doesn't seem to have enough volume to run down the rocker arms to the valve guides. Can anyone point me in the right direction? I can't think of anything else to try

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More info please , what has been done to engine ?  how many hours ?  any info you have we need

Just a wild guess , if the major bearing surfaces are worn , ie rod,main, cam, etc etc   the oil pump will not

be able to maintain enough flow /pressure to push oil to the far reaches of its journey . A flow diagram would be nice to have

Valve guides don't really need a flood of lubrication , usually residual splash and oil vapor will suffice , Is it possible

they are getting set up a bit tight ??

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maybe 40 hours on major overhaul. had the head off twice not for gulled valve guides and bent pushrods on #4 cylinder. just installed a new oil pump and oil and filter. just doesnt  seem like i can get the flow of oil to ride on the valley of the rocker arms to get to the valves

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what is the oil pressure when running? are the passages to the  rocker stands clear. Does the head gasket have the right holes in it to allow oil flow up? Maybe no big enough. I am building a 236 right now. W

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Any signs of aeration in the motor oil ?   Had a cummins once (555)  would not push oil to the top end

or the turbo , ended up being crack in pickup tube flange

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Are you using valve guide seals years ago IH had a service bulletin out warning to never use valve guide seals on those engines, do you have plenty of oil dripping out the rocker arm bushings?

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I had the machine shop fix the head for me. I have 38 psi oil pressure at probably 900 RPM. Im sure it has guide seals. I think I do have quite a bit of oil coming out of the rocker shaft for the rocker arms. I just cant get anything to the valves themselves. oil will pool in the rocker arms just wont follow the valleys to the valve guides. I know the rocker rams and supports are assembled right.

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I did have the machine shop install the cam bearings for me. Could it be possible that the bearing that oils the head is off just a bit and not letting full flow of oil go to head?

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