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Old 11-07-2022, 07:11 AM
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HWYSTR455 HWYSTR455 is offline
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Join Date: Jan 2005
Location: Winchester, VA
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Agreed, there can be minor leakage past the hash marks even when everything is 'right'. I've noticed when engines sit parked for extended periods, this can become more evident.

I would have to go back thru my notes regarding if the Best rope seal is compatible with hash marks or not, all my memories at the moment are that I've always used the OE type ones that came with the Fel-Pro full engine gasket sets. Not the basic kit the 'premium' kits.

I would think a rope seal would work without hash marks as long as it has the graphite, but am not going commit to that at the moment. The hash marks were there to hold a touch of oil so the seal doesn't 'stick' to the crank when sitting for a period of time, or that's my understanding. (You can imagine, sticking is not a good thing). With that in mind, you can understand why the originals would weep a little right out of the factory, and might/can/is considered 'normal'.

If you understand that concept, you can clearly understand why there are 'anti-rotation holes' in the block/cap. When you pack a rope, pack hard in the areas of the hole, and concentrate on packing those areas first. You have to 'feed' the rope into those holes as you pack, accordion-ing the rope from the ends towards the holes. (If you can imagine that). Work from the parting lines to the center.

Also, I recall over the years the ropes included in those Fel-Pro kits went from an amber color to a more grey/black color, suspect that they started using graphite in them, not sure. I've had success with both though.

Packing the seal in the cap/block is a test of patience, crank has to be R&R'd multiple times to ensure you get the proper fit. It's a balance of drag and fit/clearance, but can say initially, there's more drag than one would think, required to make it seal right. After a number of heat cycles, it takes a 'set', and the drag loosens up some anyway.

Those 'custom' or intent-specific packing tools are garbage, using a large deep well socket (or similar item) to pack is what I've had most success with.

Ok, morning brain-dump completed, more coffee is needed...

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