I need some one to answer a question for me. Is it normal to have carbon deposit build up on the part of the intake valve thats up inside of the head. I took my intake off and looked down inside the head and it looks like what the exhaust valves would look like. Also the intake manifold runners are some what black. I can't see as to how this is normal. If it's not, what's wrong and how do I fix it. Thanks Ricko No:
I had that too I had that both on my 430 heads and on my 455 heads. I just cleaned them of with a wire brush. When I did my garage porting! will
Typically, those deposits are caused by excessive oil going past the valve guides. I have never seen an iron head, that did not need guides.. The other possibility is that your sucking oil thru the PCV system, or thru the intake/head flange. With an oily intake, I might look at the PCV setup first.. see if there is oil in the hose from the carb to the valve. JW
Thanks for the opinions, I just got back from the machine shop and found out why I was getting blow by and why I have alot of carbon build up on my intake valves :af: My cyclinders are out of round so my rings didn't seat :ball: So now I'm getting it bored from 30 to 40 over with a tourqe plate. I've now got a set of 30 over Poston hyperutectic 2 pistons for sale if any bodys interested, $200 gets them. Rick
