miller_350 Posted June 24, 2022 Share Posted June 24, 2022 Hi, My oil pressure gauge was working correctly until my service... I bought 5W40 instead of 5W30 not sure if that would have caused this or if it's sensor/wiring issue. When I turn the key to position 1 (i.e. engine not on) it goes all the way up to max. Should I change the oil back to 5W30? Cheers Quote Link to comment Share on other sites More sharing options...
Ekona Posted June 24, 2022 Share Posted June 24, 2022 Check levels first, drain and refill if necessary. My first guess would be overfilled. Quote Link to comment Share on other sites More sharing options...
miller_350 Posted June 24, 2022 Author Share Posted June 24, 2022 Thank you. How many of litres of oil does it take? Quote Link to comment Share on other sites More sharing options...
HEADPHONES Posted June 25, 2022 Share Posted June 25, 2022 Full oil change and new filter is 4.7 litres Quote Link to comment Share on other sites More sharing options...
Olly350z Posted June 25, 2022 Share Posted June 25, 2022 I doubt very much changing to 5w-40 caused this. I ran 5w-40 in my 350z and now my Nismo for the last 6-7years without any issue. First step, check oil level. If OK then I strongly suspect that its either the guage itself or the oil pressure sensor which is a common failure on these cars. My buddies 350z did exactly this, would go straight to 120psi and stay there. We got a replacement sensor located on the bottom of the pil pan next to the oil filter and swapped it out. Easy job, just be very careful when you tighten it back up. Steel sensor and aluminium block, you over tighten it you will crack your lower block and that's a bad day. My rule was finger tight, 1/4 turn on the ratchet and job was a gooden Quote Link to comment Share on other sites More sharing options...
miller_350 Posted June 25, 2022 Author Share Posted June 25, 2022 Thank you both. There is just under half a litre left out of 5 litres so oil should be spot on but will check shortly. Just strange it started straight after service unless it was knocked Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted June 25, 2022 Share Posted June 25, 2022 The switch is next to the oil filter so it possibly took a knock. Check the switch and wiring and associated parts for damage Quote Link to comment Share on other sites More sharing options...
miller_350 Posted June 25, 2022 Author Share Posted June 25, 2022 Ah that's makes sense thank you. The oil is just under the H mark so not overfilled Quote Link to comment Share on other sites More sharing options...
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