check oil lamp comes on, oil sufficient
#5
There are some good questions posted by other members above this post. We're here to help if you help us help you.
Here are some tips for changing or validating an oil pressure sending unit.
1) I used oil pressure sending unit socket like the one in the picture to remove and re- install the unit.
2) The factory installed sending unit came with thread wrapped in teflon tape. Some people replace Teflon tape with Permatex PTFE (Thread Sealant). It is good to use some type of thread sealant be it Teflon tape or Permatex thread sealant.
3) If you use a kit to perform an oil pressure test, be careful to test the gauge hose or male end threads with your sending unit to make sure you match the thread type. It turned out the oil pressure testing kit I purchased from Harbor Freight provided an exact match for the Nissan British Standard Pipe Thread (BSPT) thread type. The factory oil pressure switch is 1/8 BSPT whereas most american gauges will use 1/8 NPT. I have read about people damaging the BSPT threads when trying to connect a thread pattern made for an american car. The picture shows how I tested the new sending unit threads with the testing kit gauge threads.
Here are some tips for changing or validating an oil pressure sending unit.
1) I used oil pressure sending unit socket like the one in the picture to remove and re- install the unit.
2) The factory installed sending unit came with thread wrapped in teflon tape. Some people replace Teflon tape with Permatex PTFE (Thread Sealant). It is good to use some type of thread sealant be it Teflon tape or Permatex thread sealant.
3) If you use a kit to perform an oil pressure test, be careful to test the gauge hose or male end threads with your sending unit to make sure you match the thread type. It turned out the oil pressure testing kit I purchased from Harbor Freight provided an exact match for the Nissan British Standard Pipe Thread (BSPT) thread type. The factory oil pressure switch is 1/8 BSPT whereas most american gauges will use 1/8 NPT. I have read about people damaging the BSPT threads when trying to connect a thread pattern made for an american car. The picture shows how I tested the new sending unit threads with the testing kit gauge threads.
Last edited by CS_AR; 05-11-2014 at 06:28 PM.
#7
The VQ30DE sending unit seems to be much easier to reach than the first Nissan engine where I learned to run a pressure test. Replacing that sending unit was almost as much fun as replacing the main 14mm power steering bracket bolt on our cars..
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