HELP! Oil pressure drops to zero when braking hard!!!
#1
HELP! Oil pressure drops to zero when braking hard!!!
Ok guys, I noticed this happening for the first time today on the way to work. I hit the brakes hard, and suddenly saw my "Check Guages" light on. This is the first time I've ever noticed this. On the way home, I tried it again. Sure enough, under hard braking, the oil pressure will drop to zero, everytime. I did just change the oil today, but it got it's usual 5 quarts. Should I maybe try to overfill it? The dip stick shows that it is full. I do have the stock oil pan, but have rebuilt the motor, and I went with a brand new Melling High Volume oil pump. Is is possible that so much oil stays in the block b/c of the HV pump, that not enough stays in the pan, and when I brake it sloches away from the pick up tube? I'm lost. I cannot continue to have this problem though. Any suggestions are welcomed. Thanks!
#8
I don't mind raising it a bit...but I don't want to pull it again. The motor has been out of the car more than it has been in it.
I'd like to add that the car holds 50-60 PSI oil pressure at idle, and almost 80 PSI while driving.
I'd like to add that the car holds 50-60 PSI oil pressure at idle, and almost 80 PSI while driving.
Last edited by bad96firechikin; 07-19-2003 at 07:06 PM.
#9
Before I go to the trouble of dropping the oil pan, I can't help but think that maybe there is a connection to me changing my oil today. I know I put in 5 1/2 quarts, and I know I didn't double-gasket the filter. I also ran the car last night at the track, and I wonder if there is a connection there also. Any suggestions?
#11
Originally posted by bad96firechikin
Before I go to the trouble of dropping the oil pan, I can't help but think that maybe there is a connection to me changing my oil today. I know I put in 5 1/2 quarts, and I know I didn't double-gasket the filter. I also ran the car last night at the track, and I wonder if there is a connection there also. Any suggestions?
Before I go to the trouble of dropping the oil pan, I can't help but think that maybe there is a connection to me changing my oil today. I know I put in 5 1/2 quarts, and I know I didn't double-gasket the filter. I also ran the car last night at the track, and I wonder if there is a connection there also. Any suggestions?
#12
I appreciate the advise Shoebox. I did an interesting experiment a little earlier. I first got the car to speed, then slammed the brake and held the clutch, and of course the oil pressure fell to zero again. The next several times, I got the car to speed, threw it in neutral, and held the engine at 3000 RPM and 80 PSI oil pressure, while I slammed the brake and brought the car to a halt. The oil pressure never dropped past the 40 PSI mark in all of my attempts. If this were a problem with the pick-up tube coming uncovered, shouldn't the pressure fall of quicker if it is holding constant at 80 PSI when the car comes to a halt? I know the car did not have this problem this morning before I changed the oil. I'm going to change the filter tomorrow, and see if by some wierd freak accident it is related to the filter. Who knows.
#13
Just in case you have to pull the pan I just did mine after dropping in new 385 and had 2 rods hitting the pan. You don't have to pull motor, just jack it up 3 inches, In my case I also lowered the K-Member a 1/2" and then the pan came out. Good Luck
#14
Originally posted by RCF925
Just in case you have to pull the pan I just did mine after dropping in new 385 and had 2 rods hitting the pan. You don't have to pull motor, just jack it up 3 inches, In my case I also lowered the K-Member a 1/2" and then the pan came out. Good Luck
Just in case you have to pull the pan I just did mine after dropping in new 385 and had 2 rods hitting the pan. You don't have to pull motor, just jack it up 3 inches, In my case I also lowered the K-Member a 1/2" and then the pan came out. Good Luck
#15
I had the same problem with my 97 Camaro. I went under the car and pounded on the oil pan with my fist and heard a clank every time. I ordered a happy hooker from TPIS, lifted the motor high enough to pull the oil pan and fixed the oil pump pickup. Good Luck!!
Courtney
Courtney