dennis

Can someone explain to me the resleeving process in an open deck honda block? F22 in my instance, but probably very similar to an H22.

I've searched and searched - I don't want to know who does it, just a good in depth description of what has to be done.

I was reading about the different sleeve types as well. Our honda blocks are dry sleeves aren't they? Opposed to wet sleeves.

Are the stock iron sleeves pressed out or bored out? And I'm mainly intersted in the process for standard ductile iron sleeves rather than the closed deck design like Golden Eagle.

The reason I ask is that the machine shop says they can get sleeves for cheap (around $20 a cylinder) and about $50/cylinder to install. Assuming these sleeves are of a super hard material i.e. ductile iron, why are people paying upwards of a grand to have their blocks resleeved??? A sleeve is a sleeve is a sleeve, it doesn't care what it's going in (as long as it's made for higher than normal cylinder pressures i.e. boost)

Someone enlighten me... Looking for some good in depth technical explanations here (someone that actually works in a machine shop would be nice)

thanks...

Spade

http://www.goldeneaglemfg.com

dennis

thanks, I've seen all the sites that offer the service, but I want a technical explanation by someone in the industry.

Mista Bone

recently Circle Track magazine had an article on the general process of sleeving a motor.

StorminMatt

There are actually several processes of resleeving. Some involve closing the deck while others don't. And those that do close the deck can do it in several different ways. Typically, in those proceses that don't close the deck, the entire sleeve and aluminum support is removed by boring and a thick cast iron or steel liner is pressed into its place. These sleeves are basically wet sleeves since there is no longer any aluminum between them and the water. I should note that this method of sleeving is falling out of favor due to the availability of T-sleeves that close the deck. Closing the deck is popular since it strengthens the engine.

If the deck is closed, it can be done in one of two ways. At least in the past, DPR would first close the deck by welding something similar to the Nuformz Block Guard into the space between the cylinders and outside of the block. Then, the sleeves were bored out and new ones pressed into their place. Finally, the block is decked and holes are drilled for water passageways. The more common way of closing the deck these days is alot like the resleeving process in which the deck is not closed. The only difference is that these newer sleeves (T-sleeves) have a lip on the top with water passageways that close the gap between the cylinders and block.


[Modified by StorminMatt, 2:28 AM 12/18/2002]

ChiBoy

I've heard this kind of thing before too and wondered if it is an option for a not-so-high HP engine. If you could get these kinds of sleeves in 85mm and run less than 10psi, would they hold up, or are GE's the only real option?

dennis

Thanks guys, I'll see what I can find with the circle track article.

Matt: In the case of Honda's siamesed cylinders, is there any problem with putting in new "standard" (not T-sleeves). Do the sides have to be machined to mate up as each cylinder is butted up to the next?

I understand that the standard sleeves may not be as good as the T-sleeves, but I assume they're much better than stock. Is there anything that would negate this assumption?

Thanks again...

Mista Bone

If I was gonna sleeve a block, I'd do it right the first time.