Gene, Shoot some oil into the other six clyinders and see if they don't
come up to over #200. Check into buying yourself a leak down tester.
They are a great tool.
Doug Odom in big ditch
Gene Halvorson wrote:
>
> Now comes the interesting part:
>
> I also just did a compression check. Just to
> see how things are doing in there.....
>
> Six of the cylinders build compression between 180# and 185#. I think
> this is a good thing.
>
> One builds 235# (number 2 cyl) and another 245# (number 4 cyl). I
> think this is not such a good thing in comparison.
>
> By the way, it's a BBC.
>
> So I believe I have a camshaft/valve train problem. I never did
> a compression check right after building the motor. It now has about 1500
> miles on it. Compression ratio is around 9.8 to 1.
>
> The cam is a Isky "Mega" series hydraulic. I haven't done much else
> yet but I suppose I should start checking lobe duration and lift at the
> valve. I can't think of any other reason two cylinders would build such a
> significant difference in pressure. I suspect valve timing. I'm not
> sure of what the usual compression build would be but I just don't think I
>have
> six bad cylinders. The old manual I have indicates a compression
> reading of 150# is the approximate range for a compression check for 454
> chevys.
>
> Any thoughts out there???????/
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