 Jim Grant's Tech Tips '96 Chevy Blazer, Leaking Oil Cooler Lines
Q: How long should oil cooler lines last? I had the engine oil cooler lines replaced in December of ’02 on my ’96 Chevy Blazer. I just had to have them replaced again last week. The lines had less than 13k miles on them when they failed. The dealer's service rep said it was a very common problem. - Sharon W. A: How long should oil cooler lines last? A lot longer than they do on GM products! As far as I’m concerned GM has a problem with their engine oil cooler lines. I own 2 GM vehicles and they have both had to have their oil cooler lines replaced. On one of the vehicles the engine oil cooler lines started leaking with less than 6k miles on it. The replacements are starting to show signs of leakage and they have just over 20k miles. Yes, it is a problem and it is not a problem to ignore. Why is that? We’ve replaced engines for customers because the oil cooler lines failed completely while the customer was on the highway. They didn’t shut their engine down quickly enough to prevent damage.
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