how bad is this?

[vspec]

I took my head off tonight and was getting ready to pull my top end off when I noticed this.

A piece of the sleeve next to one of the ports appears to have broken, looks like the weakest part too.

Think I could get away with just chamfering the edge or I am totally screwed?

 

[Blaaster]

I don't like the look of it, I personally would not like to take the chance of a ring snagging with that bridge missing.

 

[sicivicdude]

I took my head off tonight and was getting ready to pull my top end off when I noticed this.

A piece of the sleeve next to one of the ports appears to have broken, looks like the weakest part too.

Think I could get away with just chamfering the edge or I am totally screwed?

Totally screwed, that intake bridge keeps the rings from popping out. Without it, it can snag a ring and destroy the piston. I have a cylinder sitting on the shelf right now I got in a package deal just like that, and I'm not putting it on anything until it get resleeved.

 

[vspec]

well i do have another jug but i'm afraid to use it.

the mating surface has a bunch of low spots and i don't think it will seal.

 

[sicivicdude]

pictures of the lowspots. Mating surface MIGHT not be as huge a deal as that sleeve break.

 

[vspec]

pictures of the lowspots. Mating surface MIGHT not be as huge a deal as that sleeve break.

get ready to cringe.

I don't even know how that would happen, looks like someone took a hammer to it.

Other than it just needs a bore lol, sucks though it's a virgin cylinder and never had a re-bore.

And the cylinder with the busted bridge has had alot of port work done to it too, sad that it's toast.

 

[sicivicdude]

You have a better shot using the hammer cylinder than the broken sleeve cylinder...

The main sealing surface for the headgasket is on top of the sleeve. You need to remove the head studs and lap the head gasket mating surface to figure out if the sleeve is damaged or just the aluminum around it.

 

[vspec]

The low spots are after the sleeve thankfully.

 

[sicivicdude]

You may be able to use it. You'll have to lap it to make SURE but it's possibly usable.

 

[Blaaster]

Lap it on a sheet of plate glass covered with 400 - 600 wet and dry, figure of 8 motion, WD40 or metho for lubricant. Heat cycle 5 times and re tension.

Should work ok, worth a try anyway.

 

[vspec]

Well I lapped the other head but the low spots were just too low to fix.

So now I need a new jug, which means I lose all the nice porting work .

 

[sicivicdude]

That is unfortunate but a risk with engines that come apart like that.

Get the broken sleeve resleeved and get the installer to match the ports back (they have to do it anyway) so you can keep the ported cylinder with a brand new 66mm sleeve down in it. You'll have another 10 lives....

 

[vspec]

Unfortunately I don't have the cash to get it resleeved atm.

I'll just have to suck it up, get a another jug and deal with a slower blaster for awhile.

or get the jug with the low spots milled as Ken suggested via pm.

 

[Blaaster]

I was just thinking what Ken suggested, there must be somewhere that will take a smidgin of the top of the cylinder, it cant need much!

 

[vspec]

I was just thinking what Ken suggested, there must be somewhere that will take a smidgin of the top of the cylinder, it cant need much!

I'll take a close up macro shot of the damage, it's worse than what my previous pic made it seem.

 

[vspec]

My camera sucks but you get the jist of it.

photobucket is so slow with resizing.

 

[OConnor Racing]

That cylinder can be repaired by cutting the sealing surface. It may need to be welded up as well. Lapping it will take the rest of your life. It needs to be set up on a lathe or Bridgeport and cut. After the top is cut, the head can be machined to bring the compression back down and dial in the squish. Are you running a stock head?

 

[vspec]

The head that was on the ported jug was shaved, but I also have a stock one laying around.