Cylinder sleeves, sleeve, sleeving [Merged 9-7] block bore cylinder

[1fast97gsx]

yea ... our blocks are strong enough to withstand just about anything already .. boosted hondas start to have problems raising the boost over 9-10 psi in a lot of cases so they need some stronger sleeves to raise the boost more and make more power.

 

[greathuskie]

if you wanted to though, considering you have alot of money to waste, couldnt you sleeve a 4g63 if you wanted to, as in drill the cylinders out enough then sleeve it, and make a big bore 63?

 

[1fast97gsx]

Yes I have heard of someone sleeving a 4g63 ... seems overkill for a street car though. Besides there is only so much you can drill out before you start to run out of material between the cylinders ... seems pointless IMO.

 

[Mo-Bo0st]

I made a post about this a while back. A shop wanted to sleeve my block as a repair. The general concensus was that sleeves were pointless on our motors.

 

[1fast97gsx]

it would cost more to sleeve our blocks than to just pick up a new block from somewhere...

 

[Illicit TSi]

I heard its not possible to sleeve opur blocks.. Why is this?

 

[phatTSi]

Because the 4g63 has a solid deck.

 

[boostedinaz]

I heard its not possible to sleeve opur blocks.. Why is this?

It is possible to sleave the motor but it isnt recommended. These arent Honda motors, meaning they are one solid piece. The only reason to sleave a 4G63 block is if it is cracked and you absolutly need to use that block to get the car running. Other then that they dont need it.

 

[Defiant]

Because the 4g63 has a solid deck.

That isn't why, solid-decked blocks have been sleeved since they were first cast.
The main reason is that blocks are too plentiful and too cheap. If you have a bad one, dump it and replace it.
I doubt a DSM block has enough meat in the cylinder walls to take a sleeve without breaking into the cooling passages, not the best alternative.
Solid-iron blocks are a much different world than wet-sleeved aluminum blocks.

 

[razorawd]

It would be cheaper to buy a used block and rebuild it.

 

[Illicit TSi]

Just asking since I keep hearing about heat problems when doing this and that it isnt necessary or possible so on and so on.I wanted a reason.Someone asked me why I didnt just sleeve it when I scuffed it.Now I am at my last bore (.040 over stock)so if something goes wrong now I just gotta get another one.

 

[Big Woo]

Actually you can sleeve a 4G63 block, both the 6 & 7 bolt versions, there is sufficient material to do so. However I would reccomend that you just find a good block to start with.

 

[boostmaniac]

I am just wondering if I'll need cyl. sleeves, I have a 35r that I want to run around 30-35 psi on race gas depending on my tune. ANY info will help

 

[blue1]

Whats wrong with the bores of the block now are they on max oversize or something, std and 020 size bores will take that boost long as the rest of your motor is built to take it.

 

[boostmaniac]

I bought some weisco's that are .40 over

 

[Lunch_Box]

You don't need sleeves for our blocks.

 

[blue1]

Still shouldn't be a problem the bores have a fair bit of thicness to them.

 

[Defiant]

I bought some weisco's that are .40 over

Well, why? It's not a V-8. Over-boring a 4-cylinder is for repairing block damage. The gain in displacement is trivial. You might want to look into swapping those pistons back, if you can.
DSMs, as said, don't have sleeves. Nor would you want them.

 

[boostmaniac]

Thats what I thought ,I've never seen anyone sleeving our block but I was talking to someone and they said well you might want sleeves. So I was just double checking pretty much.

 

[blue1]

I have fitted a lot of sleeves in my time (not to any 4g's) and i have never bored thru the original bore when fitting the sleeve, so where is the gain going to be? they are thinner than the original casting of the bore, even what you call a "B" sleeve which is the thickest you can get. the wall thickness of a bore repair sleeve is about .120. So where the guy said you need them ask him what the gain is? We used to sleeve the 8 cyl's on the ford clevland blocks because the casting quality and material was poor and they used to split bores when using a 12.5 comp forged piston in them.

 

[Boostedexcel]

I just got my Wisecos(.20 over) today! Does the piston to wall clearance have to be different for a sleeved cylinder compared to a unsleeved cylinder? Also what is a recommended clearance for piston to wall and ring gaps?
P.S. Im leaning towards a hard break in.....

 

[Spyderman7]

The piston to cylinder clearance is the same sleeve or not.Wisecos come with rings and a spec sheet with reccomended clearances for both.

 

[Defiant]

If you have a block that needs sleeving, scrap it and get one that doesn't.
Otherwise, no, cylinder sleeves are made of iron which is very similar to the rest of the block.

 

[Boostedexcel]

The way yuo worded your answer leaves me a little confused...So the sleeves are usually cast iron? Also I guess scraping it out of the question since I already dropped of my piston for reference today. Why would I scrap a perfectly good block if all the cylinders are stock bore except for one needing a sleeve...it was either go 40 over on all four or go with a sleeve and bore all 4 cylinders .20 over........

 

[xharlequinx]

Someone had already gone through my block and overbored it to a bigger size than the piston I had bought for it. I have 87m pistons .20 over and to my surprise they were too small. A previous owner had honed it out to .40 over. I was stuck w either sending the pistons back across the country and waiting for custom .40 over pistons to be made, or to get stock cylinder sleeves and use the wiseco 87mm .20 over pistons.

My only question is: Is sleeving a motor like a 4g64 a good idea or a bad idea. Could there be any potential problems once the sleeves are in? I know that diesel engines are sleeved all the time, but they only rev out to 4k. I know my engine revs out to 5 or 5.5k rpms, so I have no idea whether the sleeves can stand that much friction.