Get some Permatex Dielectric Grease and put a small bead around the inside of the cap where it sits on the distributor housing and a dab inside all the plug boots on both ends.
This will not make it water proof but very water resistant.
I use it on mine and you can soak the distributor with a garden hose and it will start right up.
If you submerge the cap to the top it will get in through the cap vent but just water getting on it won't allow it inside.
Originally Posted by LIJeeper
i went wheeling today with my 89 4 cyl wrangler lucky i was with people or i would have been stuck. Well to my problem, we were going along some pretty deep puddles and after a really deep one the engine started running rough im not a mechanic but it seemed like it was missing a cylinder would barly make it to the higher rpms to shift, i got to a clear area and turned it off the check the engine off (Bad Idea) took out the spark plugs wires sprayed then with WD-40 after a while of trys and one of the guys taking apart the distributer it finally started but it sounded like the started was messed up and fly wheel, i dont think any of this would of happened if the wires didnt get wet is there any way of keeping the distributer and spark wires dryi heard they have something for it? i did some searching nothing came up, and im going to take my starter out and check everything to make sure no water got in any of the oil.