1hz slow prime at startup (1 Viewer)

[snt2010]

Hi I have recently rebuilt 1hz and completed 10000ks. I have noticed after the last service the motor takes about 6 to 8 seconds before the oil pressure light turns off. I have replaced the sender unit but made no difference. I have fitted a digital oil pressure guage and it shows 12 psi when the light turns off at 6 to 8 second mark. Cold motor has 70 to 76 psi at idle drops to 20 psi at idle when at full temp. Holds around 30 to 35 psi at 100ks in 5 th gear. Has anyone had similar issues.

 

[AussieHJCruza]

Hi I have recently rebuilt 1hz and completed 10000ks. I have noticed after the last service the motor takes about 6 to 8 seconds before the oil pressure light turns off. I have replaced the sender unit but made no difference. I have fitted a digital oil pressure guage and it shows 12 psi when the light turns off at 6 to 8 second mark. Cold motor has 70 to 76 psi at idle drops to 20 psi at idle when at full temp. Holds around 30 to 35 psi at 100ks in 5 th gear. Has anyone had similar issues.

What brand is your oil filter, what weight oil have you got in the engine, and what's your location for temperature reference please

 

[snt2010]

Sakura filter. Castrol super diesel 15w/40 Maryborough Qld 24deg today