Jump to content
SAU Community

Recommended Posts

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 by Taso84

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...

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.

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.

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.

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.

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.

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.

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.

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.

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.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • The real question is, on some of those wild roads they call highways, how many times did a farmer in an old ute from the early 2000s blaze past you over double lines?   Tassie is a wild and really cool place, and after doing a work related road trip there January of 24, I understand why Targa Tasmania is ran there, and is so tough to do well at! We had a brand new Camry Hybrid that handled quite nicely, and thankfully weren't in an old car, because cresting some of those hills in a 100kmh zone for it to suddenly be like "surprise f**kers, this is a recommended 30kmh hard right turn" wouldn't be pretty. We weren't racing the Camry around, but we weren't slouching in the bends either. But my lord those old farmers know their old clapped out utes, and those roads, as they were absolutely hammering it!   You're also super lucky to make it up to Mt Wellingtong this time of year. It's often road closed with snow/ice! Also, I hope you hit up Salamander Road in Hobart for some insanely good food (I highly recommend the dimly lit Irish pub for a Guiness Pie, or even the bangers and mash!!!)   How long did the Ferry take to get across? I want to do a road trip of Tas on my own time, but I get horrifically sea sick, and I don't want me on the Ferry, just the car 😛
    • So far so good, about 30km on it so far and nothing out of sorts yet thankfully
    • Look at @Kinkstaah's thread on the issue.
    • Hmm not really, I'd say its race car life or modified car life when you make 3 or 4 times the power Nissan designed the car for lol. 
    • I'll let others with more breakage chime in, but I can't think of anyone who had a problem with the standard centre plate before they had a problem with the standard gears - the plate generally just gets replaced for safety when the gearset is upgraded. As for the gearsets, its not like they are OK at 600Nm and break at 601. Their longevity is a combination of how much torque you are making and how gentle you are on shifts (or not). 
×
×
  • Create New...