Oil pressure question?? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

72nismo · 07-30-2017, 11:30 AM

What should my SR20det oil pressure gauge be reading at idle at 1000rpm?
At the moment I'm getting a reading of 8psi.

Thanks
Luis

taeisbeast · 07-30-2017, 11:43 AM

wow, thats extremely low.

I've seen numerous numbers in the range of 35-40 psi

kyral · 08-01-2017, 12:22 PM

Quote:

Originally Posted by 72nismo

What should my SR20det oil pressure gauge be reading at idle at 1000rpm?
At the moment I'm getting a reading of 8psi.

Thanks
Luis

that's a bit low it should be about 10-12 at idle so maybe 13 at 1k

are you running atleast a 40w oil? maybe try a 50
but if that's the case you probably have some moderate bearing wear

definitely should not be 35-40 at 1k unless your engine is cold

72nismo · 08-01-2017, 12:34 PM

Quote:

Originally Posted by kyral

that's a bit low it should be about 10-12 at idle so maybe 13 at 1k

are you running atleast a 40w oil? maybe try a 50
but if that's the case you probably have some moderate bearing wear

definitely should not be 35-40 at 1k unless your engine is cold

I'm running 5-30 Mobil synthetic oil. And at idle its dropped as low as 6 and sometimes lower. When I give it gas it does go up to 30-40. But no higher.
I'm starting to think my oil pump might be bad.

kyral · 08-01-2017, 02:09 PM

Quote:

Originally Posted by 72nismo

I'm running 5-30 Mobil synthetic oil. And at idle its dropped as low as 6 and sometimes lower. When I give it gas it does go up to 30-40. But no higher.
I'm starting to think my oil pump might be bad.

Sr20det takes a 40weight not a 30 dude.. get that junk out.. and put some rotella 15w40 in

72nismo · 08-01-2017, 02:11 PM

Quote:

Originally Posted by kyral

Sr20det takes a 40weight not a 30 dude.. get that junk out.. and put some rotella 15w40 in

I will try that.
Thanks

taeisbeast · 08-01-2017, 03:38 PM

I run mobile devlac diesel oil

kyral · 08-01-2017, 03:44 PM

Quote:

Originally Posted by taeisbeast

I run mobile devlac diesel oil

this is good too, as long as its atleast a 40 weight and not more than a 50 weight (which diesel usually is a 40w)

I can gurantee that using a 40w will help at the least if not correct this issue all together

the shocker · 08-02-2017, 12:03 AM

20w50, been running for years now. But really, should probably save for a rebuild

kyral · 08-02-2017, 08:57 AM

Quote:

Originally Posted by the shocker

20w50, been running for years now. But really, should probably save for a rebuild

why would you go straight for a rebuild when an oil change will likely put this car back at healthy psi and is far cheaper?
Even if the car had sustained some damage or wear. it happens, itll still run and still provide a long service life if properly watched and maintained from there

Why does everyone on zilvia always recomend the most expensinve impractical route

Kingtal0n · 08-03-2017, 04:35 AM

what kind of gauge

nisileighty · 08-03-2017, 12:15 PM

Quote:

Originally Posted by the shocker

20w50, been running for years now. But really, should probably save for a rebuild

I run 20w50 (VR-1) as well with no problems

72nismo · 08-03-2017, 01:17 PM

Quote:

Originally Posted by Kingtal0n

what kind of gauge

Running a glow shift guage. Then I bought an oil pressure tester to see if my gauge was bad but got same low numbers.

Jefro240 · 08-04-2017, 07:18 AM

Quote:

Originally Posted by kyral

why would you go straight for a rebuild when an oil change will likely put this car back at healthy psi and is far cheaper?
Even if the car had sustained some damage or wear. it happens, itll still run and still provide a long service life if properly watched and maintained from there

Why does everyone on zilvia always recomend the most expensinve impractical route

X2. If your oil is heavily contaminated with fuel you will get a lower pressure reading. If your oil pump is on its way out, you will get a lower pressure reading. Even with 5w30 on a cold start up, you should be see 60+ psi.

Myself, some what recent oil change. Mobil 1 10w30. Cold start @ 1500rpm I see 80psi. As it falls down toward 1000rpm I see 60psi. Once fully warm @ 850rpm I see 18psi.

I'd start with an oil change... Either 15w40 or 15w50. If oil pressure is still low I'd get a new oil pump. Worst case, if you do need a rebuild, you will want a new oil pump anyway.

72nismo · 08-04-2017, 04:10 PM

Quote:

Originally Posted by Jefro240

X2. If your oil is heavily contaminated with fuel you will get a lower pressure reading. If your oil pump is on its way out, you will get a lower pressure reading. Even with 5w30 on a cold start up, you should be see 60+ psi.

Myself, some what recent oil change. Mobil 1 10w30. Cold start @ 1500rpm I see 80psi. As it falls down toward 1000rpm I see 60psi. Once fully warm @ 850rpm I see 18psi.

I'd start with an oil change... Either 15w40 or 15w50. If oil pressure is still low I'd get a new oil pump. Worst case, if you do need a rebuild, you will want a new oil pump anyway.

I will be changing oil this weekend. I hope that does it! Thanks !!

72nismo · 08-04-2017, 06:35 PM

Quote:

Originally Posted by Jefro240

X2. If your oil is heavily contaminated with fuel you will get a lower pressure reading. If your oil pump is on its way out, you will get a lower pressure reading. Even with 5w30 on a cold start up, you should be see 60+ psi.

Myself, some what recent oil change. Mobil 1 10w30. Cold start @ 1500rpm I see 80psi. As it falls down toward 1000rpm I see 60psi. Once fully warm @ 850rpm I see 18psi.

I'd start with an oil change... Either 15w40 or 15w50. If oil pressure is still low I'd get a new oil pump. Worst case, if you do need a rebuild, you will want a new oil pump anyway.

15w40 or 15w50 Is oil for Diesel engine. That will work on an SR? It won't damage engine????

Sent from my iPhone using Tapatalk

72nismo · 08-05-2017, 09:34 AM

Diesel oil huh? Hmmmm

kyral · 08-05-2017, 12:52 PM

Quote:

Originally Posted by 72nismo

Diesel oil huh? Hmmmm

yes run the diesel oil, a lot of people run it. I even run it in my brand new rebuilt ka24 but I use a 10w30 rotella cause ka's take 30-40 weight, but SR's take 40-50 and the weight is very important for oil pressure

72nismo · 08-05-2017, 01:30 PM

Quote:

Originally Posted by kyral

yes run the diesel oil, a lot of people run it. I even run it in my brand new rebuilt ka24 but I use a 10w30 rotella cause ka's take 30-40 weight, but SR's take 40-50 and the weight is very important for oil pressure

I will try it.
Thanks
Bam! Got it
https://imgur.com/a/XvIwm?s=sms

Standard · 08-05-2017, 08:29 PM

Quote:

Originally Posted by kyral

that's a bit low it should be about 10-12 at idle so maybe 13 at 1k

Where is this info coming from? Is this real life experience?

hanzbrady · 08-05-2017, 09:06 PM

Quote:

Originally Posted by Standard

Where is this info coming from? Is this real life experience?

FSM call for about 11 psi at 800RPM, now granted my engine isn't stock I figured I'd throw my 2 cents in. I run SAE 60 Dominator by Amsoil and see 12-15 PSI at idle and that's usually in 100+ degree weather.

kyral · 08-06-2017, 06:32 AM

Quote:

Originally Posted by 72nismo

I will try it.
Thanks
Bam! Got it
https://imgur.com/a/XvIwm?s=sms

youre killing me dude... fram filter really?

smoked240 · 08-06-2017, 09:35 AM

I run 0w20 in my rebuilt rb. I see 6 bar at warm idle with 10w30 so I had to switch. About 2 bar at idle with 0w20 However this isn't an Sr so my info probably is useless.

72nismo · 08-06-2017, 02:32 PM

So I did the oil change. Warmed it up and my pressure went up to like 30s then when warmed up it ended at 10psi. Took it for a test run and got home and at 900 rpm and oil pressure was at 7psi. So gut feeling something wrong.
https://imgur.com/a/LmgNt?s=sms

kyral · 08-07-2017, 11:41 AM

Quote:

Originally Posted by smoked240

I run 0w20 in my rebuilt rb. I see 6 bar at warm idle with 10w30 so I had to switch. About 2 bar at idle with 0w20 However this isn't an Sr so my info probably is useless.

0w20? youre crazy man. are you running super tight bearings?
and 2 bar at idle would be like 30 psi and 6 bar would be like 90psi one of which are very unlikely

OP are you rod knocking at idle?
You have some oil pressure so thats atleast a good sign
how are we testing oil pressure? like what setup are you using
youre only a couple psi off where you should be id say give the 50w a shot your bearing might just be worn a bit

hanzbrady · 08-07-2017, 11:46 AM

That's too low. Engine building rule of thumb is 10PSI per 1000RPM. Drain the pan and look for any metallic material. Also pull the oil pan and start checking the rods to see if any are knocking that you can't hear yet. If you still don't find anything pull the engine and then the main caps and check the main bearings. If you're lucky you haven't spun a bearing and you just need to replace the oil pump.

72nismo · 08-07-2017, 06:34 PM

Quote:

Originally Posted by hanzbrady

That's too low. Engine building rule of thumb is 10PSI per 1000RPM. Drain the pan and look for any metallic material. Also pull the oil pan and start checking the rods to see if any are knocking that you can't hear yet. If you still don't find anything pull the engine and then the main caps and check the main bearings. If you're lucky you haven't spun a bearing and you just need to replace the oil pump.

I forgot to post this pic but this is what I've seen last couple oil changes. And at the moment car is not even driven much. Mostly just test driving it.

https://imgur.com/a/OFL8r?s=sms

Quote:

Originally Posted by hanzbrady

Stop running the car, you spun a bearing. The engine is dead and absolutely will need a rebuild.

72nismo · 08-07-2017, 06:39 PM

Quote:

Originally Posted by hanzbrady

Stop running the car, you spun a bearing. The engine is dead and absolutely will need a rebuild.

So because of the metal particles on the magnetic oil pan plug. That's a sign motor is dead?

hanzbrady · 08-07-2017, 06:39 PM

Quote:

Originally Posted by 72nismo

So because of the metal particles on the magnetic oil pan plug. That's a sign motor is dead?

Yes. That's bearing material.

72nismo · 08-07-2017, 06:41 PM

Quote:

Originally Posted by hanzbrady

Yes. That's bearing material.

If thats the case Im really screwed because bearing were replaced not to long ago. And I mean like in the last 4 months.

This is not a stock SR but a built SR if that makes any difference.

07-30-2017, 11:30 AM	#1
72nismo Zilvia Junkie Join Date: Oct 2006 Location: So Cal Posts: 490 Trader Rating: (7) Feedback Score: 7 reviews	Oil pressure question?? What should my SR20det oil pressure gauge be reading at idle at 1000rpm? At the moment I'm getting a reading of 8psi. Thanks Luis Last edited by 72nismo; 07-30-2017 at 06:10 PM..

07-30-2017, 11:43 AM	#2
taeisbeast Zilvia Addict Join Date: Nov 2011 Location: Texas/Afghan Posts: 738 Trader Rating: (10) Feedback Score: 10 reviews	wow, thats extremely low. I've seen numerous numbers in the range of 35-40 psi __________________ Intangible Visionary: Multimedia Production

08-01-2017, 03:38 PM	#7
taeisbeast Zilvia Addict Join Date: Nov 2011 Location: Texas/Afghan Posts: 738 Trader Rating: (10) Feedback Score: 10 reviews	I run mobile devlac diesel oil __________________ Intangible Visionary: Multimedia Production

08-05-2017, 09:34 AM	#17
72nismo Zilvia Junkie Join Date: Oct 2006 Location: So Cal Posts: 490 Trader Rating: (7) Feedback Score: 7 reviews	Diesel oil Diesel oil huh? Hmmmm

08-06-2017, 09:35 AM	#23
smoked240 Zilvia FREAK! Join Date: Jun 2010 Location: North Dakota Age: 30 Posts: 1,066 Trader Rating: (4) Feedback Score: 4 reviews	I run 0w20 in my rebuilt rb. I see 6 bar at warm idle with 10w30 so I had to switch. About 2 bar at idle with 0w20 However this isn't an Sr so my info probably is useless. __________________

08-02-2017, 12:03 AM	#9
the shocker Join Date: Jan 2009 Location: BC, Canada Age: 30 Posts: 40 Trader Rating: (0) Feedback Score: 0 reviews	20w50, been running for years now. But really, should probably save for a rebuild

08-03-2017, 04:35 AM	#11
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 38 Posts: 4,649 Trader Rating: (17) Feedback Score: 17 reviews	what kind of gauge

08-06-2017, 02:32 PM	#24
72nismo Zilvia Junkie Join Date: Oct 2006 Location: So Cal Posts: 490 Trader Rating: (7) Feedback Score: 7 reviews	Changed oil to 15-40 So I did the oil change. Warmed it up and my pressure went up to like 30s then when warmed up it ended at 10psi. Took it for a test run and got home and at 900 rpm and oil pressure was at 7psi. So gut feeling something wrong. https://imgur.com/a/LmgNt?s=sms

08-07-2017, 11:46 AM	#26
hanzbrady Zilvia FREAK! Join Date: Apr 2015 Location: Floriduh Posts: 1,168 Trader Rating: (4) Feedback Score: 4 reviews	That's too low. Engine building rule of thumb is 10PSI per 1000RPM. Drain the pan and look for any metallic material. Also pull the oil pan and start checking the rods to see if any are knocking that you can't hear yet. If you still don't find anything pull the engine and then the main caps and check the main bearings. If you're lucky you haven't spun a bearing and you just need to replace the oil pump. __________________ [email protected]

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode