351 block cylinder cut

[1972ho]

This is 4.030 bore cylinder that has .200 to .150 thickness thrust side look runnable between the bores almost no room for hard block.

[ProPower engines]

If you are doing a part fill you can use a torque plate and gasket with the block perfectly level in all directions and pump up the cooling system with air pressure of about 25-40 lbs for a hour or so to force the hard block filler down away from the top into all the small/tight areas.

[DaveMcLain]

If you carefully vibrate the block properly mixed filler will flow all around and in between the cylinders, no problem. I use a blunt 1 inch diameter tool in an air hammer turned all the way down to rattle the block. Vibrate not ventilate!

[Walter R. Malik]

If you carefully vibrate the block properly mixed filler will flow all around and in between the cylinders, no problem. I use a blunt 1 inch diameter tool in an air hammer turned all the way down to rattle the block. Vibrate not ventilate!

YES ... just mix it a tiny bit wetter with the coldest water you have.
The shop radio is always on and I have a separate woofer which I place on top the block until the filler is almost solid.

[Frankshaft]

If you use Rok blok from Competition products, it automatically flows everywhere. Its BY FAR the easiest block filler to use. Its some sort of thin runny epoxy. Its not embecco 885, originally thought that's what it was. A buddy of mine has been using the 885 bought in bulk, and its definitely not the same. The Rok Blok is white like flour, and has the same consistency. 885 is darker in color and it more concrete like. Seriously, if you have never used it, try it. If you fill a lot of blocks, you will thank me. The key, follow directions exactly, and do not adjust the amounts of water or filler because you think its to runny.

[jsgarage]

Your photo 2 is a fine graphic illustration of the well known casting-core-shift in 351s and is a good recommendation to NOT bore such engines AT ALL, or at least not without a sonic check first! Thanks for the photo. Could you mike' the thin-wall vs thick-wall dimensions on the cut block & publish it?

[n2xlr8n]

If you use Rok blok from Competition products, it automatically flows everywhere. Its BY FAR the easiest block filler to use. Its some sort of thin runny epoxy. Its not embecco 885, originally thought that's what it was. A buddy of mine has been using the 885 bought in bulk, and its definitely not the same. The Rok Blok is white like flour, and has the same consistency. 885 is darker in color and it more concrete like. Seriously, if you have never used it, try it. If you fill a lot of blocks, you will thank me. The key, follow directions exactly, and do not adjust the amounts of water or filler because you think its to runny.

Thanks for that. My current build will utilize your recommendation.

[turbo2256b]

Your photo 2 is a fine graphic illustration of the well known casting-core-shift in 351s and is a good recommendation to NOT bore such engines AT ALL, or at least not without a sonic check first! Thanks for the photo. Could you mike' the thin-wall vs thick-wall dimensions on the cut block & publish it?

i dont think thats core shift in pic 2 thats the gap between cylinders as its not a siamesed block. also its either the front or rear cylinder # 1, 4 , 5 or 8. The water passages in those locations is most often the widest

[Leftcoaster]

If you use Rok blok from Competition products, it automatically flows everywhere. Its BY FAR the easiest block filler to use. Its some sort of thin runny epoxy. Its not embecco 885, originally thought that's what it was. A buddy of mine has been using the 885 bought in bulk, and its definitely not the same. The Rok Blok is white like flour, and has the same consistency. 885 is darker in color and it more concrete like. Seriously, if you have never used it, try it. If you fill a lot of blocks, you will thank me. The key, follow directions exactly, and do not adjust the amounts of water or filler because you think its to runny.

Anyone know if Rok Blok actually adheres to a clean rough surface, and is effective for both cast iron and aluminum blocks?

Thanks - -

[Frankshaft]

It adheres. Not sure how strong the bond is though. They say its totally water tight. I know of a few aluminum blocks that have been filled with it with no issues.

[FloydODB]

http://dartheads.com/product-category/s ... lock-ford/

[superpursuit]

Is this from a Cleveland or a Windsor 351 block? Thanks.