1968 912 jug hone?

earlr85944 · 11-20-2006, 10:27 AM

I just honed my factory jugs to clean them up and changed the rings because 1 ring was cracked (that explained the low compression on 1 side. Now: did I damage the jug as it seems from reading on the net that these are all alum jugs?

Steve F · 11-21-2006, 09:30 AM

What you have is a alum finned sleeve bonded/pressed over a steel liner. I did the same thing to mine and just haven't run it yet,but with fresh rings you are correct in honing other wise the rings would never seat.

Cheers,Steve

earlr85944 · 11-21-2006, 03:55 PM

thanks for the info, my info search was into very grey areas as performance parts listed my replacement jugs as all aluminum but a search on the net came up with porsche using nikasil treatment from 1970 and up. Anyway its great that I didnt do damage as there are other areas that need attention.

912UK · 912UK's Garage

I rehomed my 356 ones it's in the factory book you can do it and there is tollerances to work towards stay inside these and your sorted..

earlr85944 · 12-03-2006, 06:27 PM

Thanks, I did find out they are steel sleeve with alum fins, ok to hone with the stones like we did.

Regards,
RS