Gadfly
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- Sep 9, 2007
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I have a 3.0L V6 in a '99 Ranger 4x4. Sudden loss of oil pressure. This was REAL loss of oil pressure and not the sending switch, as after I noticed the light and gage showing zero pressure, I killed the engine and coasted. The oil was a little low, so I put oil in to the proper level -- and the engine would not turn over.
I towed it home and manually oiled every friction surface (long story, but trust me). Finally managed to get the engine to turn using a heavy chain wrench, bc could not get enough torque on harmonic balancer bolt.
Engine started and ran fine after it blew the extra oil out of the cylinders.
Zero oil pressure, so after running perfectly for some 30 seconds, I shut it off.
Pulled pan and oil pump. Tested oil pump, and it works fine.
Reinserted shaft up into the camshaft drive for the pump and attempted to turn it with a wrench. I figure if the shaft drive gear were bad, I should be able to turn the engaged shaft, but I cannot.
Since I found hardly any trace of metal in the pan, I think this engine is worth saving, but I am at a loss.
QUESTION: Where is the over-pressure bypass switch for the oiling system?
I figure it is stuck open.
But it's just a guess. I'm open to suggestion
I towed it home and manually oiled every friction surface (long story, but trust me). Finally managed to get the engine to turn using a heavy chain wrench, bc could not get enough torque on harmonic balancer bolt.
Engine started and ran fine after it blew the extra oil out of the cylinders.
Zero oil pressure, so after running perfectly for some 30 seconds, I shut it off.
Pulled pan and oil pump. Tested oil pump, and it works fine.
Reinserted shaft up into the camshaft drive for the pump and attempted to turn it with a wrench. I figure if the shaft drive gear were bad, I should be able to turn the engaged shaft, but I cannot.
Since I found hardly any trace of metal in the pan, I think this engine is worth saving, but I am at a loss.
QUESTION: Where is the over-pressure bypass switch for the oiling system?
I figure it is stuck open.
But it's just a guess. I'm open to suggestion