New Steel Cylinder Liners

You are asking for all kind of issues. What engine are we discussing here? 308?
You could have a tool and die machine shop cut them to match the originals and see what the bore looks like after you install them but I would think that may be sketchy.

 

Have the machine shop check the block and fit the sleeves it’s better to have them mate if need each sleeve some might need to be cut others might not what does the specs say about fit Tolerances


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I doubt the bores are so bad as to need the sleeves custom machined to fit. If the sleeves are .002 on the big side, get them cut down. Like I said, a tool and die type shop would be my choice as precision is appsolute on a job like that. Cutting .001 off of a 3+ inch sleeve is a high precision job. Set up will be critical. I have an outstanding lathe and that is not a job I want to do. Not that I can't, but the time and set up would make it expensive.
It should be done with a four jaw chuck adjusted to zero runout, (each sleeve would need to be set up this way) and then a tail center with a custom made insert to have it dead centered when you make a cut that is a 1/3 of a human hair. On the plus side, if they slip in easily, (cut a little too much), it is not the end of the world. They are stepped and can be sealed in place. 355 sleeves slide in by hand.

 

Have you discussed this with the liner manufacture? That would seem like the proper place to start.

 

Why do you have to deal with this manufacturing problem?

 

Measure the original ones?

 

The specs for a QV engine hole where the liner goes in are: 93.000 - 93.022 mm at the top and 87.000 - 87. 035 mm at the bottom. For a slip-in fit, the maximum spec for the liner must be 0.001 of an inch less than 87.000 mm.

Give that spec to the manufacturer and tell him "your problem, not mine"

 

Who made the sleeves?

 

Then your case no longer meets specs ...

 

I'm sorry Jeff is going through this, but I must say that I have ordered a number of things from Superformance for my '77 308 over the years and most of them did not fit on my car even though they said that they would.

 

That’s good to know do you use Loctite for a sealer when they are at that point
Reason I’m asking I have been in the market for a 348-355 and pretty sure anyone I get will probably need a big service hopefully not sleeves but if they do I’d like to know my options


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Great thanks for that info
I know about the valve guides and ready to do them on either car I end up getting but you never what you might find when you take a engine apart



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I have changed a few liners on F355 where the valves burnt out and the owners continued driving on it.

 

Yes, I have had two like that as well. Not common though.

 

I agree that you need to talk with the guys you bought the parts from.

I don't know about these engines. But I do know that in machinery there is such a thing as an interference fit. Is that a possibility in this case?

 

Most of the parts I've ordered for my engine rebuild required some sort of adjustment. In most cases I cannot say for sure if the supplier was wrong or if there were some manufacturing update on our car. At the end of the day if the additional machinist cost is not outrageous, I just make it do.

Bringing back these pistons skirts to spec did cost less than sending them back and forth to the UK. 500€ for the first piston, half an hour (50€) for the remaining 11...

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I must say, that I had no such issue with Superformance, all their parts have been trouble-free (so far). Their back-order management is frustrating though...

At the end of the day we have to bear with our suppliers: if it were not for their hard work, our cars would be stuck in the parking.