manifold rock

Patmo · Sunday at 11:44 AM

Hey guys and gals I have a major issue can anyone help ? I have a 360 bored and stroked to 408 I'm having a rock from front corner of the manifold to the opposite side rear with no gaskets on , the motor was not built by me I bought it that way I have had the manifold machined down because it was sitting too high on the heads I just verified the best I could the flatness of the manifold with 4 123 blocks on my glass top stove (only thing I have flat enough) and I get no rock there and this is just on the china wall part on the manifold ,should I take it to a machine shop to have it verified ? Or what could be another issue? I believe motor was decked that's why I had to have manifold machined, Leaving for work right now but when I get home I will set it up again and check angles with a protractor (just thought of this and I should have checked the angles ).
Thanks for any info !!!

missing linc · Sunday at 12:16 PM

Did you remove the pins from the china wall?

Patmo · Monday at 11:06 AM

no pins on china wall

mygasser · Monday at 3:22 PM

did they machine the parts of the manifold that sits above the china wall front an back or just the faces that bolt to the heads?
neil.

MOPAROFFICIAL · Monday at 3:47 PM

Patmo said:
Hey guys and gals I have a major issue can anyone help ? I have a 360 bored and stroked to 408 I'm having a rock from front corner of the manifold to the opposite side rear with no gaskets on , the motor was not built by me I bought it that way I have had the manifold machined down because it was sitting too high on the heads I just verified the best I could the flatness of the manifold with 4 123 blocks on my glass top stove (only thing I have flat enough) and I get no rock there and this is just on the china wall part on the manifold ,should I take it to a machine shop to have it verified ? Or what could be another issue? I believe motor was decked that's why I had to have manifold machined, Leaving for work right now but when I get home I will set it up again and check angles with a protractor (just thought of this and I should have checked the angles ).
Thanks for any info

The heads move around a little bit on the dowels. You might want to try pushing the heads towards the valley as you snug and tighten them up just before torquing them. The other thing could be they didn't machine the block correctly, or the intake is tapered from front to back. In any case if you put gaskets on it and it doesn't Rock and if you torque it down and it doesn't leak, I wouldn't worry too much about it

Patmo · Tuesday at 12:46 PM

Found the issue and it was staring right at me I was showing my neighbor and he pointed out a casting bump on the area under the water port front left if your at the front of car and yes it was hitting the china wall totally obvious and didn't even notice it . I ground the casting bump down and low and behold its good now , I feel like such an idiot .
Thanks

dr dodge · Tuesday at 12:59 PM

Patmo said:
Found the issue and it was staring right at me I was showing my neighbor and he pointed out a casting bump on the area under the water port front left if your at the front of car and yes it was hitting the china wall totally obvious and didn't even notice it . I ground the casting bump down and low and behold its good now , I feel like such an idiot .
Thanks

good deal! sometimes just talking about things help you solve them
and extra eyes on something help, too

manifold rock

Patmo

Member

missing linc

Loose nut behind the wheel

Patmo

Member

mygasser

Well-Known Member

MOPAROFFICIAL

If it has tits, it's a liabilititty.

Patmo

Member

dr dodge

Well-Known Member

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