Gudgeon Pin Question

[AlfaLofa]

Should the gudgeon pin be free to rotate within the piston?

I can press 2 pins into the pistons with my fingers but the other 2 need a drift and a light hammer.

Is this normal?

I've seen them described as "floating" which to me means free moving (if we forget about the retaining circlips).

[rgh0]

Yes that is normal in my experience to have the fit in that range.

cheers
Rohan

[AlfaLofa]

Thanks Rohan.

[billwill]

I've seen a video on youtube, where the engine builder popped the pistons in hot water to expand them so that he could slip the gudgeon pins in without force.

Hence it seem they should be a reasonably tight fit, but not a hard fit.