redtop oil pressure problem

Post by **lilfetus2k5** » Mon Nov 12, 2007 8:31 am

i just put a new greddy head gasket and arp head studs on my s13 redtop sr. along with a new greddy oil pan, oil pick up and oil pump. ive primed the pump numerous times both by crankin it with everything unplugged and manually thru the turbo line. and ive only got about 10psi of pressure on start up and throughout the RPM range. idiot light comes on if idling, goes out if above 1500 rpms. so i hooked up an oil pressure gauge and its at just about 10-14 psi. and i know the light is on with anything under 10psi. does anybody have any ideas or anything about what could be happening? ive tried sending unit, new gauge new pick up. everything. any help would be great!! thanks!!

Post by **lilfetus2k5** » Mon Nov 12, 2007 1:00 pm

anyone? :-(

Post by **homeslicej2** » Tue Nov 13, 2007 4:52 am

bad new pump?

Post by **lilfetus2k5** » Tue Nov 13, 2007 5:14 am

thats maybe what i was thinkin, just because its new doesnt mean its good right? lol. well see it was doing this same thing with the old pump which is why i replaced it. so its doing the exact same thing with the new pump. so wouldnt that count out the pump as a bad part?

Post by **homeslicej2** » Tue Nov 13, 2007 5:25 am

Huh. You're not leaking/blowing oil anywhere, you've tried different sensors, and still the same thing? maybe you've got blockage somewhere that is restricting flow. I don't know, but if it did it with the old pump and the new, I don't think it's the pump. Hopefully some more knowledgeable members will chime in later today.

Post by **lilfetus2k5** » Tue Nov 13, 2007 5:58 am

thats what i cant figure out. i guess i just need to pull it and get it completly bulit. all i want is 410whp. we'll see.

Post by **homeslicej2** » Tue Nov 13, 2007 6:21 am

only 410 whp, there's no only in that. That's a lot, what kind of setup are you running, and I'm sure someone can help you out, just give it some time for people to view the thread and reply. Also, are you running the right amount of oil now with the Greddy pan ~5.5 quarts?

Post by **lilfetus2k5** » Tue Nov 13, 2007 6:43 am

5.5? my directions said one quart more then stock which would come out to 4.75 correct? and ive seen cars with 2 quarts in them and are supposed to have 6 quarts and they still have pressure. anyway, i had the stock pan the firstime it was doing this.

Post by **homeslicej2** » Tue Nov 13, 2007 6:47 am

Oh, I don't know, I just have the stock pan, I was guessing. That reminds me, most people say 3.5 quarts for stock S13 SR's. Mine shows full off of 3 quarts and it has the correct oil dip stick.

Post by **lilfetus2k5** » Tue Nov 13, 2007 7:29 am

mine always showed full right between 3.5 and 3.75 on stock pan. so i put 4.75 in with the greddy oil pan. and everytime i take off the oil filter oil comes out. so oils getting to some places. blockage seems to be the main suspect i suppose.

Post by **lilfetus2k5** » Tue Nov 13, 2007 11:57 am

somebody help!!

Post by **rustest86** » Thu Nov 15, 2007 12:08 pm

the oil sending unit is before the oil filter so you have a either, 2 bad oil pumps, blockage between the oil filter housing and the pump assembly in the block, or a releaf valve stuck open. and im betting on stuck open releaf valve being that 2 oil pumps have low pressure. there sould be a little bb looking valve behing the oil filter, it a bypass valve check that and the releaf valve on the oil pump assembly its self. it could have a peice of metal stuck in it from manufacturing. one other thing to check, if your a dumba$$ like me, i grabbed the wrong bolts when i put the pickup tube on.... they were tooo long and bottom out before tube tightened up all the way...... needless to say after going back into it 4 times i finnally found my problem.... good thing i used the whole thing of assembly lube.... redline is awsome.

Post by **lilfetus2k5** » Thu Nov 15, 2007 3:36 pm

ill have to look into all that. got any pictures to better direct me to the valves?i've never dealt with either of them.

Post by **lilfetus2k5** » Fri Nov 16, 2007 2:41 pm

okay well i found both relieve valves and both seem to be in good shape, springs move freely with no hesitation. i dont know what to think... blockage in the block maybe?

Post by **lilfetus2k5** » Sat Nov 17, 2007 3:12 pm

Post by **homeslicej2** » Mon Nov 19, 2007 4:00 am

Come on guys, someone here as to be able to help.

Post by **lilfetus2k5** » Mon Nov 19, 2007 3:03 pm

my only guess is 2 bad oil pumps.. its so frustrating

Post by **lilfetus2k5** » Mon Nov 19, 2007 3:05 pm

and what do you mean about you used a whole thing of assy lube? what'd you do, disect the pump and cram assy lube in the gears?

Post by **rustest86** » Mon Nov 19, 2007 6:23 pm

yep it takes a WHOLE lot of assembly lube to fill it and itll help prime it and keep it primed. but check for blockage in the block. take the filter housing off and the pump too, then blow through the feed line in the block and see if anything comes out. also check you pickup tube for any holes. if you had a bent pan it could possibly crack the pickup tube.

redtop oil pressure problem

redtop oil pressure problem

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