Watery/Dirty oil everytime i trail it - JeepForum.com
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post #1 of 2 Old 09-04-2011, 08:37 PM Thread Starter
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2008 JK Wrangler 
Join Date: Dec 2010
Location: Brunswick
Posts: 193
Watery/Dirty oil everytime i trail it

Ive taken my jeep out to the trails (jeepskool) the past few months, and everytime ive came home, my 4.0l's oil was dirty. I pull the dipstick out and the last 3/16 is a darker shade and thicker. This problem has already cost me one engine. I had water in my oil + muddy radiator and overheating caused a rod knock and rod bearing failure. I rebuilt another engine and added a snorkel. I have about 1000 miles on it, and took it out for the first time this weekend. I did a good 5+ hours of trail time and water/mud was as deep as 30" at the most. What could be causing dirty oil? The only thing i can think of is pulling the distributor out and RTV'ing around the inlet to suppliment the paper gasket. I am considering taking 5 quarts of oil and a pan to change out before i even drive home next time, i would hate to damage my newly rebuilt engine and then have to do this all over again. Any other ideas? Thanks -Jon

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post #2 of 2 Old 09-05-2011, 01:49 AM
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1990 YJ Wrangler 
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The oil dipstick tube could also a point of entry for muddy water, depending how how much splashing has occurred. Or, if the tube has a crack in it, water could be seeping in there.
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