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Greetings.
I have a 3.4L V6 and just replaced my Oil Pressure Sending Unit. I figured I'd just write a quick message so that others can search and learn from my experince. I know this information is posted in other messages, but I thought posting it again all togather wouldn't hurt.
Symptoms of Bad Oil Pressure Sending Unit:
1. Oil Pressure reads lower then normal
2. Oil Pressure 'flickers' at idle (moves with RPM's)
3. Burning Oil Smell, smoke coming from driver side of 3.4L or even passengar side if leak is bad enough
Symptom #3 happened to me about 1-2 months after Symptom #2. When I finally changed it I had oil all over the exhaust from under the oil sending unit, almost all the way back to the CAT. Finding leak by tracing smoke dosen't work. :-)
How to be almost positive it's Oil sending unit:
1. Take off foam heatshield from around Oil Sending Unit, if oil sending unit or inside of heathshield is oily, you have a bad sending unit.
2. Take off electrical connection to oil sending unit, if the electrical connections have any oil on them, the unit is bad
Once I took the old oil sending unit off it was obvious that it was the problem. I looked at the exahust pipe under the oil sending unit, and it was clean right up until directly underneath the unit then it was all coated with oil.
My 3.4L used the Grounded Oil Sending Unit. I picked it up from Autozone for ~$20.
Of course I took my old one apart, and found that part of the diaphram was broken and letting oil up into the electronics and the oil would eventually go out the top where the electrical connecter is, drip down the sides of the oil sending unit, and then onto the exahust. You can't see it leaking down the sides of the oil sending unit, because it's inside the foam heatshield thing.
Only thing I didn't know was how tight to put it in. Any one have a torque spec? I just used German torque (gut 'en tight).
I have a 3.4L V6 and just replaced my Oil Pressure Sending Unit. I figured I'd just write a quick message so that others can search and learn from my experince. I know this information is posted in other messages, but I thought posting it again all togather wouldn't hurt.
Symptoms of Bad Oil Pressure Sending Unit:
1. Oil Pressure reads lower then normal
2. Oil Pressure 'flickers' at idle (moves with RPM's)
3. Burning Oil Smell, smoke coming from driver side of 3.4L or even passengar side if leak is bad enough
Symptom #3 happened to me about 1-2 months after Symptom #2. When I finally changed it I had oil all over the exhaust from under the oil sending unit, almost all the way back to the CAT. Finding leak by tracing smoke dosen't work. :-)
How to be almost positive it's Oil sending unit:
1. Take off foam heatshield from around Oil Sending Unit, if oil sending unit or inside of heathshield is oily, you have a bad sending unit.
2. Take off electrical connection to oil sending unit, if the electrical connections have any oil on them, the unit is bad
Once I took the old oil sending unit off it was obvious that it was the problem. I looked at the exahust pipe under the oil sending unit, and it was clean right up until directly underneath the unit then it was all coated with oil.
My 3.4L used the Grounded Oil Sending Unit. I picked it up from Autozone for ~$20.
Of course I took my old one apart, and found that part of the diaphram was broken and letting oil up into the electronics and the oil would eventually go out the top where the electrical connecter is, drip down the sides of the oil sending unit, and then onto the exahust. You can't see it leaking down the sides of the oil sending unit, because it's inside the foam heatshield thing.
Only thing I didn't know was how tight to put it in. Any one have a torque spec? I just used German torque (gut 'en tight).
