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  #1  
Old 02-20-2010, 10:10 AM
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Default Coolant Issues on the 4.7

I am loosing coolant for some reason. I have 2002 1500 4.7 with 40k on it. It smells as if it is leaking somewhere on the top/passenger side of the motor but I cant see anything leaking. Someone told me that the 4.7 had issues with the plastic intake manifold cracking but I didnt know for sure.
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Old 02-20-2010, 10:49 AM
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Mine was a split on the plastic cap, on the seem, on the side passenger sideof the radiator!
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Old 02-20-2010, 01:41 PM
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That intake manifold doesn't have water running through it.

If water tracks aren't obvious you might want to do a dye test. Most likely culprits probably going to be water pump/radiator/hose/head gasket problem.

My 4.7 had developed a corrosion channel in the head between #1 cyl and a water jacket causing coolant loss. Do you have steam coming from the exhaust?
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Old 02-20-2010, 06:20 PM
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no there isnt. I doesn't seem to be burning it, there is just a smell of coolant on the passenger side when I stick my head in the wheel well. And every so often I look at the res tank and it is almost empty
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Old 02-20-2010, 07:49 PM
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Sounds like it's time to pressure test the system and cap.
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Old 02-20-2010, 08:59 PM
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Ya, mine used coolant too. Periodically it would push some out of the over flow. The dealer installed a new 18lb cap and told that fixed it.... till it hydroliced on the number three cylinder. The head had a crack from the water jacket to the cylinder and another one starting back toward #5. I've had the truck since new, never overheated it. It apparently was seeping for years until that fatal day.
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Old 02-20-2010, 09:29 PM
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I just threw away a pair of perfectly good 4.7 heads 6 months ago after I closed down my shop .
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Old 02-21-2010, 07:19 AM
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tom what was your shop called? I used to live in dundalk
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Old 02-21-2010, 01:30 PM
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My shop was in Hanover , Md. by Arundel Mills .
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Old 02-21-2010, 05:17 PM
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To bad you tossed them. I couldn't find anything for under 700.00 and they were as much as 1200.00. I had to have one shipped from a shop in Oregon. My truck acts totally different now and some of the things it did, it doesn't do any more. This makes me happy.
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