Car is 2000 Mazda MPV which uses Ford's Duratec 2.5L V6. The smallest V6 there is. Anyway, in preparation for some repair at next coolant exchange, I ordered the engine oil cooler and the pipes that connect to the cooler. Original engine oil cooler is right above the oil filter, and the coolant spouts are rusted.
The original coolant pipes that go to/from the cooler include a section of "plastic" tubes (because they snake between the engine block and the exhaust manifold), which naturally does not have rust issue. But the new pipes I bought (OE part) have painted metal sections. Questions I have:
Doesn't coolant eat painted? paint inside the pipe will get resolved, leaving bare iron, which is going to rust from inside out. What would car makers choose to use painted metal pipe for coolant? I googled the net, and found other car makes do the same thing, but why? I don't want to re-use the old part because it's been there for 12+ years. Bu the new metal pipe really makes me worry, and there's simply no batter alternative. sigh.
The original coolant pipes that go to/from the cooler include a section of "plastic" tubes (because they snake between the engine block and the exhaust manifold), which naturally does not have rust issue. But the new pipes I bought (OE part) have painted metal sections. Questions I have:
Doesn't coolant eat painted? paint inside the pipe will get resolved, leaving bare iron, which is going to rust from inside out. What would car makers choose to use painted metal pipe for coolant? I googled the net, and found other car makes do the same thing, but why? I don't want to re-use the old part because it's been there for 12+ years. Bu the new metal pipe really makes me worry, and there's simply no batter alternative. sigh.