I am generally a enthusiastic supporter of the antifreeze method of engine cleaning, having cleaned 2 TT 46 Pros, an MDS40 and most recently an OS 40 FP. The 40 FP was painted with engine paint and even it came out bright and shinny!

However, A fellow club member tried the same thing on am older Enya engine he had, and it quickly turned dark gray! I don't know if there is something different in their metallurgy's, but he used the same Antifreeze I did (Prestone), didn't dilute it with tap water (Minerals in tap water can leach out and bond to metal), and used a ceramic lined crock pot, and used low heat. All the same as I did, but with a different engine.

If I haven't scared you yet, and you still want to try it on your Enya engine, start small. Try cleaning just the rear crankcase cover first. If that comes out OK, try the muffler. If that comes out OK, go for the rest. The only parts I didn't clean this way were the glow plugs and the carbs. I read somewhere that the anti-freeze destroys the platinum is the plug and not knowing what "soft" materials they use in the carbs I was afraid to clean them this way.