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Here’s the tale
Got on the road with the family to FL from VA. About an hour in, the Check Engine Light goes on. Seems to be running rough and a little rattle coming from the exhaust. The next day I put in the spare AMM and it didn’t change anything.
Upon arrival in FL, I had time to check things out. No vacuum leaks and codes 231,221,113. Signs point to O2 sensor; no way I can do that on the road. Car runs rough on startup, smells rich and a little rough running, but manageable. 1600 miles later, return home.
About a week later, the old, unknown age radiator started leaking at the seam (aluminum to plastic). Easy swap. Realized the exhaust was weird, in that I could fully cover the tail pipe while running the engine. Got under there and found holes in the axel pie and hair coming out of a hole in the 9 year old front can.
Swapped in new, reset the CEL and after over 100 miles, no problem.
Conclusion: The exhaust was clogged in the front can because the thing deteriorated inside and the hair blocked the flow.
Question: Could the rich running condition or the clogged muffler have caused the radiator to leak?
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89 240 wagon, 94 940, 300K, 94 940, 141K
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