I've put them on both 235 and 261s
Hi Harry
I've added them to both my C60S with 261 and C60L with 235. With my testing on engine test stand I've come to the conclusion that running the engine with the steam valve just barely open helps getting the engine to equalize temperature faster and better. My Pattern 12 had overheating problems with 216, before it got the 235 which fixed the over heating. The combination good seal on the radiator cap and coolant recovery tank keeps the radiator full of coolant to the point that when you remove the radiator cap it dumps coolant all over the engine. Loose about 16 ounces of coolant.
Have photos of fittings to use on the latter engine's, will dig them out and post.
Cheers Phil
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