Question:
my 2000 jeep wrangler with 6 cyl. has a problem with oil pressure dropping to zero once I get off of the inter state and stop for a light. once I start moving again it goes up again! but once I stop again it will go back down. when It is still cold It doesn't happen.
can you help me. some one told me that the bearings on the camshaft are worn. it that is it how expensive is it to change? oh yea, I almost for got, my jeep has 120,000 miles on it!
Answers:
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its the bearings on the crank.i had a gmc truck once did that.everytime i stopped it would go to 0 then it would climb once i got moving and it was the rear crank bearing.this is a complex question, what viscosity oil are you using?, 10-30, 10-40, etc.
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have you checked the oil pressure sender on the block? (sends the info to your Gage)
I wonder what kind of liquid (detergent) manufactures are using to clean cylinder heads?
sometimes when they get hot and are old they will give you a false reading.
do you hear any knocking sounds when the pressure on the Gage drops?
these are some of the questions a mech. will ask you.
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hope this helps..
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You're going to need an overhaul. At 120,000 miles not only are the cam bearings worn but also the rings, rods and mains plus you need a good valve job. Unless you're a good mechanic, expect to pay $1000 or more for an overhaul.For a temporary fix, use the heaviest grade of engine oil, you can find such as 20W50 or greater if available. A couple cans of STP or similar will also help raise the oil pressure a little, but again it's only a temporary fix.
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I do not believe the Camshaft thing since those bearings get relatively little wear as compared to some of the others in the engine;particularly the Rod and Main bearings on the Crankshaft.
The symptoms you describe point to excessive oil leak down rates inside the engine, once the oil is warm/hot it is easier for it to seep out of slightly greater tolerances that have developed in your engines bearings due to high millage, a good thing though is that stright Six engines are easier to slip a regroung Crankshaft into than V types.
as for cost it's the labor that will get you, the Crank with bearings should run less than $200
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no,no,no,no,no,no,I currently own an 06 Dodge Ram 1500 and would like to increase my payload capacity.?
the oil pressure sending unit is bad.that's it!!
do not jump to the worse case scenario.
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