I have already search and got 170 results, but nobody had the same problem. Basicly I never had oil pressure problem before. The motor is a b18a, I always have 10-15psi at warm idle. But getting of the Interstate after a 40 minutes drive, I notice my oil light was sorta flickering, and the mechanica gauge shows 0-2psi. I stopped driving for 5 hours then started it back up again, the pressure seems normal, but after driving for awhile I notice it started to go down, and now i'm back to 0-2psi at idle. Anybody have any idea what's goign on?

 

bump for a lil help.

 

change your oil pump or check for oil leaks...... maybe your guage is fucked.

 

it's not my gauge b/c when it gets down to 0-2psi my oil light comes on.

 

Maybe you're simply low on oil?

 

A- ur oil is getting too hot and too thin, wich will loose density and will cause oil pressure to drop

B- ur bearing clearances are in the loose side and u loose oil pressure thru there

i had the same problem, but my engine was built on the loose side of the spectrum
wich this issue was forseen and i was expecting it
i used to use valvoline 10-30 synthetic blend

now i have Valvoline 20-50 synthetic blend and its problem solved

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USDM 4G VTEC &raquo;</TD></TR><TR><TD CLASS="quote">A- ur oil is getting too hot and too thin, wich will loose density and will cause oil pressure to drop

B- ur bearing clearances are in the loose side and u loose oil pressure thru there

</TD></TR></TABLE>

This is probably what is going on. Try some thicker oil before your bearings say bye bye.

 

thanks for all the help. It just kinda puzzle me to see it happens now when I never had a problem before. The car been up and running for a good 4 months now.

 

It's summer time. It's hot y0.

 

most likely the oil pump or a bearing is about to fail.

I had same problem as you, all of a sudden after driving around some, my oil psi gauge would drop then rise then drop then rise only every now and then, and then it would go back to normal.

I did notice my oil was kinda low when this happened.

I pulled the motor apart cause I was going to do a complete build anyway and my oil pump gear was about to weld istelf to the housing and my #4 main bearing was about to sieze too from the looks of them. Car still drove pretty peppy most of the time though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USDM 4G VTEC &raquo;</TD></TR><TR><TD CLASS="quote">A- ur oil is getting too hot and too thin, wich will loose density and will cause oil pressure to drop

B- ur bearing clearances are in the loose side and u loose oil pressure thru there

i had the same problem, but my engine was built on the loose side of the spectrum
wich this issue was forseen and i was expecting it
i used to use valvoline 10-30 synthetic blend

now i have Valvoline 20-50 synthetic blend and its problem solved</TD></TR></TABLE>
that's what I have on the car right now, Quickstate sae w10-30. Ill try some 20-50 and see if it helps.
btw, does anybody know where the oil pressure relief vavle is at?

 

its in the oil pump itself

 

time for the rebuild homie