Hey Honda-Tech.

Today I took apart an old RS machine sleeved block that has been sitting for a few years. When I took it apart I noticed there are some Chips at the top of the sleeve. What causes these? Is the block still okay to run? Will I run into compression or sealing problems? I plan on doing 450whp+ on the block but want to make sure its safe before I slap everything together.

Here are some pictures of the biggest chip I have on the sleeves, which is located on Cylinder #1. All the other chips surrounding the block look very minor compared to this one.

Also how are my cylinders walls looking by Eye. (I know you can't tell much but just chime in if you spot something)

 

Just have the chip decked off at a machine shop. I would have it honed at the same time.

 

Get your machine shop to look at it and get their opinion. I don't like the look at it. Have you got a rough depth ? Is it easy to catch with your nail ? (Pictures can be decisive)

 

From what I hear RS machine sleeves cannot be decked because they are a "step" style sleeves. I guess this means they are initially slightly uneven untill the head is mounted. This is what a shop who builds alot of Hondas told me but if anyone has decked these sleeves before pls let me know how it went.

I'll try my best to describe it in words to help the picture become clear...
When touching the edge of the outer cylinder wall it feels sharp like a 90 degree angle untill it gets to the chipped part.. Where it feels slightly rounded off. (This is the outer wall I'm talking about not the inner)

A question for the theoretical geniuses out there.... Should a cylinder completely hold pressure right at the inner edge of the sleeve? If this was the case maybe it's good to go because the block is chipped on the outer sleeve?

Will take it to q machine shop but have to wait till next week.

 

Did you run antifreeze in that block? Looks like it had just straight water.

 

Yes I ran anti-freeze. The block was sitting for a few years though.

Anyone know if its okay or not? Or weather its true RS sleeves cannot be decked

 

I have only ever seen a step-deck from RS. I however, did not know that the sleeve itself was different. Sounds odd really. I would think the sleeve was made out of cast iron like most, and then decked to a step. But I would go with out the deck anyway. I like the o-ring route, but only when using a copper o-ring. Stainless just kinda scares me to use in an otherwise aluminum block and head. Your machine shop can tell you for sure though.

 

why dont you just call RS machine (562) 926-0283

 

do not deck any sleeved blocks. we had a lotta issues with blowing headgaskets in the past.

 

take it to a shop and see what they say
better to be safe then sorry

 

I Honestly don't know why I didnt in the first place..

Sent RS machine the pictures and they said they would have no problem running this block. So I guess I'm goin to run it.