Posted by ss409 on December 20, 2012 at 06:32:25 from (72.53.194.237):
picked up a 99, grand cherokee laredo, 130k miles on it. not running. has the 4.0l 6cyl in it. got it, not running, said it had a knock, n antifreeze in the oil. drained 1 gal of antifreeze out of the oil pan,, and found number 4 cyl,, with a broken electrode off the spark plug. motorcraft platinums, with a long reach electrode is in it now. service records were in the glovebox, oil changed at regular invervals at a dealer, found k&n filter n oil filter on it too. i turned the engine over by hand,, n itll lock up, i can see some rust in number 4,, gonna pull the head off it later on, n see what i find. bettin wrong plug application, n im gonna find that electrode imbedded in the piston n lots of dents in the head aint i? body looks like a dodge durango. been in a garage for 3 years till i got it. they say them 4.0 will run forever. lol.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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