The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - White build up in a brand new aluminum water neck

crm318 · 09-07-2017, 11:23 AM

I just installed a brand new aluminum thermostat housing on my 350 and after replacing the crappy gasket it came with, I noticed a white mushy film coating the inside. It's only in the housing and not in the radiator hose. It washed off easily and there is no real signs of pitting. It has to be a chemical reaction with the aluminum. Does this mean the coolant ratio is off?

09-07-2017, 11:23 AM	#1
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	White build up in a brand new aluminum water neck I just installed a brand new aluminum thermostat housing on my 350 and after replacing the crappy gasket it came with, I noticed a white mushy film coating the inside. It's only in the housing and not in the radiator hose. It washed off easily and there is no real signs of pitting. It has to be a chemical reaction with the aluminum. Does this mean the coolant ratio is off? Attached Images __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies