Your problem isn't unique. If I recall wd40 was invented to displace water. We had a army surplus jeep on the farm. When things wet under the hood, it shorted out the spark. Moisture on the old spark plug wires, moisture under the distributor cab is a killer.
I have a 2007 GMC work truck with a v6, same problem. It's the old school distributor. I have replaced the OEM and 2 Auto Zone distributors and only have 75K on truck. Auto Zone distributors last longer than the OEM and all you have to do is buy one. The zone has a 5 year free replacement, can't say that about delco's.
The last time I had the same problem, I posted here and someone suggested using grease as a sealer around base of cap. So far so good. It all about dew point and relative humidity that cause condensation. Yesterday morning, temp was 67, raining, and I needed to turn defroster on. Well it fixed the problem inside cab, then after window got to 66 degrees, condensation formed on the outside of glass. Condensation has always been a problem in Indiana. Dew is simply condensation on the grass, causing grass mold.
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Today's Featured Article - A Belt Pulley? Really Doing Something? - by Chris Pratt. Belt Pulleys! Most of us conjure up a picture of a massive thresher with a wide belt lazily arching to a tractor 35 feet away throwing a cloud of dust, straw and grain, and while nostalgic, not too practical a method of using our tractors. While this may have been the bread and butter of the belt work in the past (since this is what made the money on many farms), the smaller tasks may have been and still can be its real claim to fame. The thresher would bring in the harvest (and income) once a y
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