Post by
Q45tech »
https://forums.nicoclub.com/q45tech-u112.html
Thu Jul 23, 2009 4:16 am
Important to understand the CHEMISTRY of the abnormal residue you are trying to remove, then you can select the proper SOLVENT for the DEPOSIT.Hydrocarbon vs detergent or some quasi mixture of both.
Everything is about temperature necessary to release the binding energy, especially since you cannot overheat without creating other damages.
Always best to TEST outside the engine first on samples.
Years ago I spent weeks on a Q45 head and some rods and pistons trying hundreds of liquids in the lab................a very fine line between cleaning and damaging aluminum.