Oil Pressure Low After Installation Of Components

[Taso84]

Hi there,

Normally for a problem like this, i'd goto my mechanic, but with Xmas break and all, thats gonna be a bit difficult, so hoping some1 can help me with this.

To cut a long story short, I've just replaced the oil filter housing piece on my rb25DET. After screwing it all in, putting the oil pressure sender back on, refilling the oil, took it for a test drive and everything was a-ok.

Then today, I started it and noticed the oil pressure gauge sitting on 0 and the oil warning light on. Checked undeaneath the car, no leaks, checks the oil level which was fine and engine also sounds fine.

So im thinking the oil pressure sensor clip has come loose, so i take it for a small drive. To my horror, the oil pressure starts moving up VERY slowly, ie doesnt make it to 2kpa.

Now i know low oil pressure can be a sign of engine failure or a failed pump but im thinking its too much of a coincedence that Ive just changed the oil filter housing. My first thoughts are that something is blocking or interfering with the oil pressure sender. Was wondering what other ppl think it might be, Thanks.

Also FYI, I installed a new adapter onto the housing that lets me put 2 senders in it, and installed a oil temp sender in the other hole - its a gold t-pies looking thing.

Also the new housing I installed was 2nd hand, I gave it a quick clean with the cloth but im worried that there might have been some large piece of gunk inside it that I couldnt see and is now blocking oil access to the sender.

Edited December 24, 2009 by Taso84

[Dale FZ1]

Remove the housing and inspect the gallery for blockage.

Is it just some sort of sandwich plate that has ports for temp/pressue senders?

[StealthX]

check the wiring on the sender, sounds like it could be a poor connection on something, i had a similar issue with my ground wire before i ground off the paint off the chassis to make a better contact.

low oil pressure causes serious damage, very quickly, so if the motor's still strong after 5 or so mins of running, you can rule out oil system failure i reckon...

[Cjmartz2k]

If the factory oil pressure gage AND the idiot red light came on, you have a real problem, not a wiring problem. The red light is a seperate sensor that's just and on/off pressure switch and it's completely independent of the normal gage.

[Swiper the Fox]

did you renew the oring on the housing shaft?

my guess is its either faulty or missing.

[T04GTR]

should still make its way into the engine, the only way out is to the main gallery,

if you can open the oil cap while its running and see if there is oil splashing around in there, if not then its a problem.

so, you replaced the oil filter/cooler assembly? why?

no aftermarket oil cooler with hoses? do you now have a remote oil filter? if the hoses are mixed up that can trick the sensor.

[Taso84]

Hi guys, and thansk for ur feedback.

Just to answer some questions, no i did not renew the oring on the housing shaft, so im not sure whether it is there or not. If this were missing, what would be the consequences?

Also, no i dont have a oil cooler now, basically my old housing broke due to overtightening of a sandwich plate. T04GTR, when u say open up the oil cap why its running, u mean the cap from which u pour oil into right? I didnt realise u could see down there but ill check it out.

[JonnoHR31]

yer the filler cap. oil should be splashing around as said

[Taso84]

Hi guys, and thansk for ur feedback.

Just to answer some questions, no i did not renew the oring on the housing shaft, so im not sure whether it is there or not. If this were missing, what would be the consequences?

Also, no i dont have a oil cooler now, basically my old housing broke due to overtightening of a sandwich plate. T04GTR, when u say open up the oil cap why its running, u mean the cap from which u pour oil into right? I didnt realise u could see down there but ill check it out.

[T04GTR]

yes while its running.

and the oring in question is in the filter block.

[Taso84]

Hi guys, and thansk for ur feedback.

Just to answer some questions, no i did not renew the oring on the housing shaft, so im not sure whether it is there or not. If this were missing, what would be the consequences?

Also, no i dont have a oil cooler now, basically my old housing broke due to overtightening of a sandwich plate. T04GTR, when u say open up the oil cap why its running, u mean the cap from which u pour oil into right? I didnt realise u could see down there but ill check it out.

[STATUS]

did you renew the oring on the housing shaft?

my guess is its either faulty or missing.

my thought too, if the old one was off for awhile it could be perished or missing.

[Taso84]

my thought too, if the old one was off for awhile it could be perished or missing.

So under these circumstances what is actually happening? the oil is not reaching the oil pressure sender? Is it ok to drive it?

[GTScotT]

dont drive it till its fixed. you want to be certain.

RRR remove recheck refit.

[Taso84]

yea i realise that is prob the best thing to do, but just wondering if it is the o-ring is the car still driveable? It does gain some oil pressure as it warms up

[femno]

Well obviously you dont understand the fact that oil pressure is crucial for the survival of the engine.

Just fix it and be done with it, or take it to someone who can!

You can drive it if you like but chances are you wont get very far.

[Rezlo]

RB25's hydro lifters would sound like 24 rocks in a tin can if they were not getting decent oil press,

Good chance you botched the install but as per most of the people here, rather get it sorted asap preferably by a pro, oil problems and engines = expencive.

[MrR33666]

TAKE OFF OIL FILTER HOUSING AND CHECK FOR BLOCKAGES

DOES THE OIL PREASURE RISE UNDER ACCELERATION?

[Don Dada]

If the factory oil pressure gage AND the idiot red light came on, you have a real problem, not a wiring problem. The red light is a seperate sensor that's just and on/off pressure switch and it's completely independent of the normal gage.

It's been a while since i dug up in the 25 but isnt the oil pressure sender and the oil light unit that big round gold colored two pin thing by the oil filter?!?

If so if it has been damaged somehow when changing out the housing that will probably explain why the two readings went wacko at once.

[SATO GTS]

You could try taking out the oil pressure switch and cranking the engine over if oil squirts out then you know there is no prolem with the feed to the switch.

yes you will get alot of oil in the engine bay.