Oil Pressure

[markOhR33]

Found out recently that while driving my R33 around, the oil gauge seem to be running slightly below the second bar. Normally it used to be staying around the middle bar ( bar showing 4 ). When I first start the car, it will be around the the highest bar which indicate 8, but after driving a while it will stay around the middle bar however now it is falling below the second bar. This happened after the first car service. I am due to second car service in 2 weeks time.

I have checked and I am sure that there are enough engine oil.

What could be wrong? Something wrong with the pressure?

Would appreciate any help I can get from anyone.

Thanks

[Cubes]

The senders can be a little iffy.

Mine will play up from time to time. The other day for some reason it was constantly reading almost zero. Pulled over went in to the shops came back out and since its been sitting normal.

Being 8 on cold, just above 2 on idle, and 6.5 at high rpm.

My sender is the origional, being 204,000km's and ~14years old. They are a mechanical device so they are not the most reliable.

If its always reading low then there is an issue.

[gt-t_r34]

i find this in my r32 sometimes on cold nights when im putting along on low rpm it gets to like under the last bar and sometimes after that when just idleing its only just above 0 hmm my sender thingy might be buggered aswell... if its not what can this mean?? shes running good so i guess it must be buggered

[WetGTR]

Firstly you have to determine if is the sender or not, replacing it, you would find out.

Change the oil.

If its still low on oil pressure then check with an external oil pressure guage. If that displays low oil pressure, then you have some problems.

1. Bad/worn oil pump

2. bigend & or bottomend bearings are worn

[gt-t_r34]

i just had a service like 2months ago not even that! ill check it out tomorrow.! thanks

Simon

[Abo Bob]

Even on the GTT they can play up and read quite low. It seems all skylines can do this.

Also the type of oil can affect it.

[ToF]

Firstly you have to determine if is the sender or not, replacing it, you would find out.

<{POST_SNAPBACK}>

Just wondering how hard is it to replace the sender because in my R32 the guage is basically useless. It is very laggy, ie. you can take off from the lights and get to the speed limit, be sitting on 2,500rpm and then after a while you slowly see the needle move up, even then it doesn't move up to the right amount.

My mate has an R31 and his stock oil pressure guage is very responsive, reacts to throttle instantly. Am I right to assume it's meant to operate like that? (And that my sender could be stuffed)

[Abo Bob]

I'm wondering if they foul up at all because mine used to read quite low and slightly erratic but since the engine was rebuilt, same sensor reused, it reacts quicker and seems to be higher which of course I put down to it being a newer engine therefore better oil pressure.

dunno.

[Cubes]

I too used the same sensor, the old motor would read lower oil pressure due to a different oil pump but still display the strange some oil pressures at times, turn the car off, start it again and its good.

[NickR33]

mine was the opposite... was fine before the rebuild and after it has been sluggish and reading low... pressure is fine on external guage... just assumed with all the mucking around it had been damaged but dunno

[markimak]

today mine was half of the last bar u divide the whole bar like / /4 / /8 i was below the bottom / very alarming during idle.. i figured it was tied in with my AFM plug acting up. on the highway it read 4 and boosting it read above 4. im changing my oil tomorrow and changing my leaking oil filter (ryco oil seal is ripped).

using castrol R 10w/60 and valvoline filter this time.

[paulr33]

is there a way to update/fix the senders to make them new/more accurate again? ie: keep the oem factory dials and gauges but make the senders quick and nice. i dont wanna have a stack of guages added to the car

[Cubes]

valvoline oil filter = bad.

Run a purolator premium or genuine.

Genuine isn't expensive.

[Roy]

Cubes...got a link to that thread you had on fitlers? It was a good read and i couldnt find it the other day when looking

[Cubes]

I think it was the usual www.bobistheoilguy.com

[TTT]

if you buy say a VDO oil pressure gauge, what will it get it's info from?

do they come with a new sensor or does it use the factory one?

My R32 oil pressure gauge seems to have a mind of it's own too.

starts fine then decides to work or go and lie down on the 0 bed for a while..

[markOhR33]

I have heard all of you guys saying engine rebuild. How much does that cost and does it mean changing the whole engine or ?

Sorry new to modifying car

Having a 93 GTST but the mileage is high 113km so think of someway to do something to the engine

[markimak]

why is valvoline so bad?

[markimak]

engine rebuild is mostly new wearable parts (cams, pistons, rods, gaskets, seals) bore and balance the important goodies. best to use stronger items and make her like new.. for mine when i do mine i want around 500HP at the wheels eventually with T70 and Dejetro FC. so will pull down engine and replace everything haha.. and refit a stronger better oil pump!. prices r all different. 3k up to 16k depends what u want wat brands.