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Thanks.
Yes, I've never changed the coolant. Here's why:
I've always owned Ford vehicles. Still have a '66 Mustang 289 that rarely had coolant changed. Original freeze plugs. Had a 1986 Mustang GT, sold with original coolant at 13 years old,147k miles. Had an '84 F250 with original freeze plugs when sold with 175k miles. I also have a 1978 Mustang that had coolant changed with motor rebuild (with Bar's Leaks OEM stuff added) in 1992. No leaks at all.
I've never had to replace a leaky freeze plug. Out of all the Ford vehicles I've owned (2.8L, 5.0L mostly), never had one fail. Probably all originals, who knows. So, I am surprised that this truck would develop leaks at 7 years and 90k miles. Must be inferior metals or poor seal, but seems odd to me.
I also have the original battery, belts, hoses and rear brakes at 120k miles. But, I expected to, as my '86 Mustang had original stuff at over 10 years old. I don't abuse them, as a matter of fact, they probably get carboned up a bit from taking it easy on them.
Thanks for the reply.
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