i was about to rering my h22 block before putting it together, but the guy i bought the engine from said it was not necessary since the rings were fairly new as well as the pistons (type S pistons). well when i looked at the cylinder walls, there was no sign of crosshatch in them. the cylinders walls are completely blank. no scratches no nothing, but i dont know if this is the way its supposed to be with the FRM sleeves h22's have.

so my question is, is crosshatching required for lubrication (hence it retains small amounts of oil) or its safe to run the block like that.

the block came off a running car.
any help?

any help is great. thanx

edit. just fyi, closed deck h22a with Type S pistons

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by charlee &raquo;</TD></TR><TR><TD CLASS="quote">i was about to rering my h22 block before putting it together, but the guy i bought the engine from said it was not necessary since the rings were fairly new as well as the pistons (type S pistons). well when i looked at the cylinder walls, there was no sign of crosshatch in them. the cylinders walls are completely blank. no scratches no nothing, but i dont know if this is the way its supposed to be with the FRM sleeves h22's have.

so my question is, is crosshatching required for lubrication (hence it retains small amounts of oil) or its safe to run the block like that.

</TD></TR></TABLE>

If the liner has some sort of special surface treatment then I suppose it's possible that it's a very smooth one with no apparent cross-hatching, though every bore I've ever looked at had evident cross-hatching.

It would be very strange to see cross hatching utterly worn away (there would typically be some still apparent on the sides of the bore adjacent to the ends of the piston pin), and if so then I'd also expect to see a significant lip at the top of the bore from where the rings don't sweep.

Just thinking about this unswept area at the top of the bore, if cross hatching was ever present then it will still be in nearly perfect original condition right at the top of the bore regardless of how worn the rest of the bore may be. Clean it up and have a look. If it's dead smooth then I'd suggest there's your answer.

Also keep an eye out for a wear lip at the top of the bore, but if the surface coating is very hard such as you might get with Nikasil coating or similar, then any wear would likely to be minimal at most (hard surface bore coatings tend to flake off rather than wear away).