Cylinder Sleeve

[scra99tch]

This picture shows what looks to me like a pin that is holding or keeping the sleeve from moving. 

I had to butcher the piston to get it out of the sleeve and damaged the sleeve in the process.

BTW it is a 1957 TWN Super Tessy.  Not much on the internet for these things and the only forum I have found is in German.  The parts manual does not show it, surprised the hell outta me that someone on facebook groups for this actually had a parts manual.

[Mike Tashjian]

Just curious as to why you want to remove the sleeve.  Most can be repaired in place unless you have another to put in. Getting another good piston and then having the bore refinished to match would probably be your best first option. 

[nc43bsa]

Contact LA Sleeve.  They might have some insight into the situation.

www.lasleeve.com

[scra99tch]

Wish I could get by just getting a new piston, but I am going to have to re-machine a new sleeve.  I mangled the bore trying to get piston out.

It looks like I can get a bare sleeve from some places.  I’ll map out the existing sleeve and just machine undersize and match the ports.


 

[pressureangle]

That sleeve appears to be very thick. How have you damaged it so bad it can't be bored?

[scra99tch]

I had this thing soaking for 3 months would apply a heat gun and torch to it once and awhile.  Finally built a jig to put some pressure on the piston and just kept tightening it until the piston ended up caving in not my intention). So I broke the crown off and started to use a burr to eat away at the piston turns out my burr went up and over a ring before I knew it so there is a nice deep nick into the sleeve.

Tell ya what I’ll bolt it down and try my boring head and see how much it will take to clean up.  I might get lucky and only be up a couple of oversizes.

[pressureangle]

I don't remember what engine it was for, but decades ago I spent many hours searching the Wiseco catalog and matched up a piston by compression height and wrist pin size to source the unavailable OEM.

[Mike Tashjian]

Machining a new sleeve when you can have the old one repaired seems like a work.  I saw some cylinders that were badly damaged and the repairs were flawless.  Even though I can make a new sleeve, I would prefer not to spend that amount of time and effort doing it.  I would prefer to source a piston and send it with the cylinder.  And the fact that you can get any coating on the cylinder is just icing on the cake.

[scra99tch]

Took the sleeve into work and measured the gouge.  Looks to be about .07" deep so I doubled that from the 2.2775" I measured off the bore and should be left with around .1084" wall thickness which is well over some internet suggested 1.5mm.  I'll look for a piston here shortly most of it is still intact to get some measurements and I'll be able to machine it if its not quite the right specs.