Can I dremel out this pin

[fstnd]

Can I dremel out this pin, which usually is supposed to hold the cylinder in place and make it not rotate? Why? Because this engine lost compression, and I want to put in another cylinder and piston, which are the same exact size and all ports are the same, but the place of that pin is different.

Pin I'm talking about:

 

[WickedFog]

Why not put the head on and give it a light tap to mark that pin location and drill the head?

 

[Weezel]

You might be able to pull it out with vice grips? You could also slightly grind a small notch in the cylinder same as what's there already. You could also cut it off if needed. Just be careful not to mark up any sealing surface in whichever you choose.

It's just a locating pin for the cylinder so it gets installed with the ports in the correct orientation.

 

[fstnd]

Why not put the head on and give it a light tap to mark that pin location and drill the head?

I plan on using the same head. The head however does not touch this pin, the cylinder does... I don't want to go through the problems of drilling the cylinder

You might be able to pull it out with vice grips? You could also slightly grind a small notch in the cylinder same as what's there already. You could also cut it off if needed. Just be careful not to mark up any sealing surface in whichever you choose.

Great idea, I'll try the vice grips. If that won't work I'll just dremel as there's basically no sealed are to be damaged if I don't slip a whole lot

It's just a locating pin for the cylinder so it gets installed with the ports in the correct orientation.

So if I remove this pin, will I not get problems of the cylinder slightly rotating during runs?

 

[Weezel]

So if I remove this pin, will I not get problems of the cylinder slightly rotating during runs?

The cylinder shouldn't turn when everything is tightened down. The pins' purpose is so the cylinder gets installed in the correct orientation. Reason, it's easier and faster to install a cylinder with a locating pin than trying to line them up without one.

 

[davidb37]

The cylinder shouldn't turn when everything is tightened down. The pins' purpose is so the cylinder gets installed in the correct orientation. Reason, it's easier and faster to install a cylinder with a locating pin than trying to line them up without one.

You want to keep that pin, the friction from the head being bolts down should keep the new sleeve from rotating, but the best thing to do is take a very thin cut off disc on a Dremel and make a slot in the new sleeve for the PIN. Problem solved. I have put different sleeves in several engines, and this has always worked. Provided your sleeve is the same diameter and will fit down in the recess cut out for the original sleeve. However there are a lot of factors that come into play, such a wrist pin height, the port height on the new sleeve, top of the Piston height at TDC, if the Piston is not tall enough or the rod is not long enough, you won't have enough compression for it to start. Out of the five times I have done this, only three of them ran, and only one outperformed the original on the other two were weaker than the original because they were too far apart in design. But good luck.

 

[fstnd]

Well I dremeled the pin out already, but the engine seems to perform perfectly with new piston, rod and cylinder only thing is, it shredded the clutchbell