rebuilt 360 smokes
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Joined: Jan 2004
Posts: 867
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From: Eastern Pa
My sons' has the same problem. It has a few thousand miles on it now and it has gotten a little better. We Pulled the intake 3 times and had the same oil situation as you in the back cylinders. Replaced the intake and still did it. We used the stock seals and went without the stock seals and just a silicone bead, no difference. Got bolts that were a little shorter and know that they are not bottoming out. In the beginning he woul have to pull the back plugs every week and clean or replace them cause they foul. We pulled the head on the drivers side which is the worst and could not find any problem there. While the head was off we paid particular attention to the cylinder bores and noted a very fine line in the back one shich was just the way it was when we put it together. The machinist, who I won't go back to, said it was too minor to be of concern. Live and learn. While trying to figure out our problem I came across something that I can't find now, that if crank and rod clearances are on the loose side as some racers would use them, the extra play would cause the oir to get slung up into the cylinder bores and thus use some oil. But as I said his problem has gotten better with mileage but it is still there.
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Joined: Oct 2005
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I think I've got it licked, I had some old valve covers laying around and cut the top off one of them, put it on and watched the oil flow through the rocker assembly. Even though I had put the #90 holley jets in to restrict the flow, it was still flooding the back two cylinders. I ended up using #64 holley jets and so far no smoke. It is still oiling good. There is one question that I'm gonna ask my machine shop though, did they give me a high volume oil pump?
Thats the only thing I can think of that cause the oil flooding.
I've just got the truck on the road legally and driving it every day, so far so good. I wanna thank everyone for all the info!
Thats the only thing I can think of that cause the oil flooding.
I've just got the truck on the road legally and driving it every day, so far so good. I wanna thank everyone for all the info!
Elder User
Joined: Jan 2004
Posts: 867
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From: Eastern Pa
Interesting. In my case the rockers and shafts are brand new from DSC, and I'm using a high volume Melling pump. I think I'll give your solution a try. Any one know how small I dare make the restriction without affecting the oil to the rockers?
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Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
It has always been my understanding (from my machinist) that the rocker arm restriction is not only so that the valve covers do not flood with oil at high RPM, but also to keep pressure down below at the main/rod/cam bearings where it should be, in case the rockers/shafts wear a lot later in life.
I wonder, do you have the right oil-feed bolt in the right spot? Are you using the splash-shields under the rocker stands? Any chance the rocker stands aren't flat on the bottom so the one with the oil feed is leaking around it's base?
I wonder, do you have the right oil-feed bolt in the right spot? Are you using the splash-shields under the rocker stands? Any chance the rocker stands aren't flat on the bottom so the one with the oil feed is leaking around it's base?
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