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Audi A5 b8.5 oil pressure test

116 views 4 replies 2 participants last post by  Boxaaz11  
#1 ·
hi all was hoping someone could help me a little.
i have a Audi A5 2.0 TDI Quattro Sportsback Engine CGLC

i was getting a "low oil pressure please turn off engine"

i changed the sensor and the light didnt come back on then after maybe 4 months the light started to come back on again especially when i was coming to a traffic light or stop. i then ended up doing a full service on my car changing oil, filters etc as my service was over due by a bit.

that stopped the light from coming back on for a while and now recently it has come back on once or twice,i scanned my car and the oil temp was at 102c when it tripped the low oil pressure sensor.

what i done recently was had vcds hooked up and my car was at idle and i revved my car until it got the oil temp to around 105c and that made the low oil pressure sensor trip and gave me the warning.

im lead to believe it is the oil pump hex key that gets worn out. my car has done 135,000 miles.

i brought myself a oil pressure tester kit i wanted to know what bar or psi am i looking for while in idle and also while revving the car to see if the oil pressure is indeed dropping.

i can drive my car around normal totally fine but if i put my foot down like in sports driving like a mad mad harsh breaking and slamming my foot on the accelerator and shooting off that usual will make the oil temp touch 102-105C were it will trip the sensor.

what im thinking of doing is driving my car until its at optimal temperature then testing at idle and while revving the car at 2000rmp

then getting the oil temp high to 102-105C and then parking up to see if the pressure drops while idle and while revving.

what bar or psi do i need to be looking out for?

sorry for the long message wanted to give as much detail as possible for some help.


thanks in advance hope to hear from you all soon :D
 
#3 ·
Hi thanks for the reply I know its not the switch as it has a fairly new switch, in regards to pcv it seems fine my friend checked. I was thinkin it could be pickup pipe but on last oil change the oil was good no sludge but when I do pressure test after I remove the sump to check the oil pump il have a look at pick up same time.

I did manage to take a picture of the error code I ended up wiping it and it aint come back on since.

I just need to know what pressure I need to look out for while in idle and while revving the car to see so that way I will know if its actually the pump or not. Iv been reading up about this engine it seems they are known for the hex key rounding off and then the pump not being able to work as it should do
 

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#5 ·
Yes so when I rev the car and get the oil temp to around 102-105c it triggers the warning. I need to get around to doing a oil pressure test and then I will be able to tell hopefully its just a false reading