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350 Chev Engine Irregular Bore Wear

Hi I had my 350 Chev engine rebuilt last year and it has only done about 3000km and was going through heaps of oil and fouling plugs, we decided to pull it down to check it out. We found that there were no hone marks left on the thrust and non thrust sides of the pistons as though the bore had been polished, all bores were the same. I have been told that leaving honing paste in after the rebuild would do this. The engine rebuilder told me it was caused by not having a cover under the PCV valve on the rocker cover.

Would appreciate any input you may have.

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  • sbautos2 Oct 09, 2008

    Thanks storm will try get some more info for you.



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What sort of rings were could cut open the oil filter and see whats in there what condition were the bottom end bearings in.running too hot?what sort of pistons,forged or cast?how was it run in

Posted on Oct 09, 2008


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so, you had built you pickups from some service center or branded.

there is a problem related to unbalenced flywheel management in engine when it was assembled that time some dust or any other particles jamed on bore.

so you have to now reopen you engine case & clean up your all part bore,pistons,crank case,perticularly flywheel attach to crank,

do with care,

takes time to get result but you will surely sceeded to fix this.


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