Hi all, So with my 83 QV motor completely disassembled, my question is do I pull the cylinder liners also, or leave them be. Also I noticed my liners are magnetic, I thought they were aluminum? Thanks Jeff Image Unavailable, Please Login
How could liner be aluminum? I don’t think that’s gonna work. Anyway, at least have it mic and see where you’re at
Since you are this far in and given the o rings at the bottom of the liners that seal the coolant from the oil, why wouldn't you especially given the age of these cars.
The QV liners are Nikasil-coated aluminum. Earlier 2V 308 engines have iron liners. The Nikasil coated aluminium liners are extremely durable. One discussion from 6 years ago: https://www.ferrarichat.com/forum/threads/nikasil-vs-steel.458557/
Well, his QV had aluminum liners when it left the factory back in 83. I suppose it's possible that someone swapped in iron or steel liners since... or maybe the Nikasil coating imparts some magnetic attraction.
Nikasail is not magnetic, or extremely weakly magnetic. Generally, the test is if a magnet won't stick it's Al sleeves (or an Al block) with Nikasail, if a magnet sticks it's iron sleeves. Another test is that iron sleeve develope a ridge pretty quickly where as Nikasail coated liners won't have a significant ridge or none that can be felt unless the Nikasail is worn through.
Thanks guys, I did confirm that the nikasil is what is causing the magnetic attraction. One of the cylinders from my Ducati does the same thing. Pulled the liners today, no problem, they are magnetic on the interior, but not exterior. Glad I pulled them the o-rings were in bad shape.
You learn something new every day, I would not have thought them magnetic. If you're buying a gasket set the viton o-rings are included. If not I have them for £10 set of 8.
With it apart to this point, dissemble and clean everything. Don't forget to replace the seals for the transmission shift rod. Its a breeze now and pain latter.
