suddenly no oil pressure SR20DET redtop - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

R3cK · 10-12-2016, 07:22 AM

cold started the engine and it rattled (strange rattle like the visco hitting the plastic, wasnt that knock sound) , pressure was there, rattle was gone.
drove.
pressure got down pretty bad
1bar (14psi) 3rd gear 50kmh
0.1 - 0.2 (2psi) bar on idle

didnt change anything and had perfect oil pressure before. (4-5bar driving)
it came out of nowhere

any tips or experiences for me?

setup:
sr20det redtop
oil filter relocation kit
oil cooler
greddy oil pan aluminum (so cant bend onto the strainer like the oem one)
new version oil strainer with big hole
new version oil squirters with big hole
new version chain tensioner
new oil pump 2 years before on the cleaned and resealed engine
more as enough oil. mobile 1: 5w50

VERT_SR · 10-12-2016, 11:24 AM

Good afternoon, I would replace the small O-rings and check for any leaks.
Upgrade to the s14 oil pickup if you can just to be safe because i had a oil pressure problem also and it helped, man good luck.

cotbu · 10-12-2016, 02:38 PM

Get a second gauge to verify. your readings now, suggest an oil pump replacement. i'm not gonna assume you have leaks or cavitation problem.

jr_ss · 10-12-2016, 02:43 PM

I second a mech gauge right off the factory oil block. If that still doesn't yield positive results, I think you should pull the pump and disassemble it. Sr pumps can crack. 5w-50 is an interesting viscosity... Why that one?

*TheRealSy90* · 10-12-2016, 05:19 PM

I believe he meant Mobil 1 15w50. Same oil I've ran in mine for 8 years.

R3cK · 10-13-2016, 01:58 AM

@VERT_SR
@cotbu
@jr_ss

thank you so much for your quick help!
i didnt know the oil pump could crack. will check that out after i tested a second gauge. but the cold start rattle really points a pressure problem.

Quote:

Originally Posted by jr_ss

5w-50 is an interesting viscosity... Why that one?

@TheRealSy90 nope 5w :>

first of all im from bavaria in europe, we get usually around 30°-40° in summer, and 10 - 20° in spring and autum. so its not like miami beach here. (unfortunately) 10° = 50F
btw u should change your temp system. water freezes on 0° and boils on 100° isnt that a nice thing?
jokes aside

5w means very good oil flow and lubrication when you cold start the engine. and thats a must have for the turbo as well as the motor gets good lubrication as soon as possible. we all drive that oil here with perfect results.
50 on 100degrees is fine as well for most drifting or racing application with an small oil cooler. so best oil choice here imo.

cheers!

jr_ss · 10-13-2016, 08:03 PM

I understand the viscosity and C to F. I just don't understand why you would want an oil that flows like a 50 once warm, especially in cooler climates. I use 15w40 in Fl, year round, but we have the weather for it. I would think a 5w40 would suit you needs better. You don't want to increase flow restriction too much, which could strain the pump.

Let us know when you tear into the bottom end/ oil pump.

VERT_SR · 10-14-2016, 10:15 AM

did you figure it out?
update?

R3cK · 10-31-2016, 02:26 AM

little update.

took my engine out and put it on the motor rack.

oil pan removed. strainer is still 100% secure but then i found something.
a broken rocker guide.
oh shit.

turned the engine around and removed the head cover.

and tataaaaa. NOTHING MISSING.
so the head is still ok. everything where it should be. no guide or shim missing.
so i wonder where the broken one in my oil pan comes from.

buuut this could explain the strange rattle i heard. maybe. or maybe not.
anways. next step is to remove the oil pump.

what could probably be damaged when you find some broken guide?

cheers

R3cK · 11-08-2016, 07:28 AM

UPDATE

after the broken guide i had to check the head. all good tho and nothing missing.

oil strainer is also ok

took the oil pump off

have to check the bearings next..

filter looks also good to me

question: can i check the oil canals somehow? air pressure for example?

jedi03 · 11-08-2016, 08:28 AM

the allen fittings are there for the canals if you want to remove and inspect them

R3cK · 11-18-2016, 11:56 AM

well well. the damn guide shot a hole into the oil canal

the oil strainer is also broken now
and the wall near the cranshaft got some scratches
crankshaft itself looks brandnew tho

cotbu · 11-18-2016, 12:13 PM

Honestly, looks more and more like installation error. Broken oil squirter, "the wall near the crank shaft" Im gonna say you mean thrust washer area, for sake of argument.

Sent from my LG-H631 using Tapatalk

R3cK · 11-18-2016, 12:18 PM

Not a native english speaker. Sorry.
Yup. Bur never touched anything. It was the guide. Look at the sillouette of the hole. Lol

cotbu · 11-18-2016, 04:45 PM

Please explain, how the guide made it to this area? I'll wait

R3cK · 11-19-2016, 03:28 AM

No idea. I have no guides missing as i said before.
Anyways problem solved i guess

Karlhammer · 12-01-2016, 08:20 PM

if the guide was in the pan theres no way it could of made it through the strainer, pump, filter, etc. There's something else going on.

zylvia213 · 12-01-2016, 10:37 PM

something was dropped in when the motor got assembled????

Kylepaschke · 12-02-2016, 09:50 AM

lol so what the fuck happened? your engine grew an additional guide?

10-12-2016, 07:22 AM	#1
R3cK Zilvia Member Join Date: Nov 2011 Location: bavaria Posts: 159 Trader Rating: (0) Feedback Score: 0 reviews	suddenly no oil pressure SR20DET redtop cold started the engine and it rattled (strange rattle like the visco hitting the plastic, wasnt that knock sound) , pressure was there, rattle was gone. drove. pressure got down pretty bad 1bar (14psi) 3rd gear 50kmh 0.1 - 0.2 (2psi) bar on idle didnt change anything and had perfect oil pressure before. (4-5bar driving) it came out of nowhere any tips or experiences for me? setup: sr20det redtop oil filter relocation kit oil cooler greddy oil pan aluminum (so cant bend onto the strainer like the oem one) new version oil strainer with big hole new version oil squirters with big hole new version chain tensioner new oil pump 2 years before on the cleaned and resealed engine more as enough oil. mobile 1: 5w50

10-12-2016, 02:38 PM	#3
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Get a second gauge to verify. your readings now, suggest an oil pump replacement. i'm not gonna assume you have leaks or cavitation problem. __________________ LoverTechnologies "Half Broken Things!"

10-12-2016, 02:43 PM	#4
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,053 Trader Rating: (34) Feedback Score: 34 reviews	I second a mech gauge right off the factory oil block. If that still doesn't yield positive results, I think you should pull the pump and disassemble it. Sr pumps can crack. 5w-50 is an interesting viscosity... Why that one? __________________ My SR20VET

10-13-2016, 08:03 PM	#7
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,053 Trader Rating: (34) Feedback Score: 34 reviews	I understand the viscosity and C to F. I just don't understand why you would want an oil that flows like a 50 once warm, especially in cooler climates. I use 15w40 in Fl, year round, but we have the weather for it. I would think a 5w40 would suit you needs better. You don't want to increase flow restriction too much, which could strain the pump. Let us know when you tear into the bottom end/ oil pump. __________________ My SR20VET

11-18-2016, 12:13 PM	#13
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Honestly, looks more and more like installation error. Broken oil squirter, "the wall near the crank shaft" Im gonna say you mean thrust washer area, for sake of argument. Sent from my LG-H631 using Tapatalk __________________ LoverTechnologies "Half Broken Things!"

10-12-2016, 11:24 AM	#2
VERT_SR Join Date: Oct 2016 Location: Tampa Age: 24 Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	Good afternoon, I would replace the small O-rings and check for any leaks. Upgrade to the s14 oil pickup if you can just to be safe because i had a oil pressure problem also and it helped, man good luck.

10-14-2016, 10:15 AM	#8
VERT_SR Join Date: Oct 2016 Location: Tampa Age: 24 Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	did you figure it out? update?

11-08-2016, 07:28 AM	#10
R3cK Zilvia Member Join Date: Nov 2011 Location: bavaria Posts: 159 Trader Rating: (0) Feedback Score: 0 reviews	UPDATE after the broken guide i had to check the head. all good tho and nothing missing. oil strainer is also ok took the oil pump off have to check the bearings next.. filter looks also good to me question: can i check the oil canals somehow? air pressure for example?

11-08-2016, 08:28 AM	#11
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,786 Trader Rating: (8) Feedback Score: 8 reviews	the allen fittings are there for the canals if you want to remove and inspect them

11-18-2016, 12:18 PM	#14
R3cK Zilvia Member Join Date: Nov 2011 Location: bavaria Posts: 159 Trader Rating: (0) Feedback Score: 0 reviews	Not a native english speaker. Sorry. Yup. Bur never touched anything. It was the guide. Look at the sillouette of the hole. Lol

11-18-2016, 04:45 PM	#15
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Please explain, how the guide made it to this area? I'll wait __________________ LoverTechnologies "Half Broken Things!"

11-19-2016, 03:28 AM	#16
R3cK Zilvia Member Join Date: Nov 2011 Location: bavaria Posts: 159 Trader Rating: (0) Feedback Score: 0 reviews	No idea. I have no guides missing as i said before. Anyways problem solved i guess

12-01-2016, 08:20 PM	#17
Karlhammer Leaky Injector Join Date: Jan 2015 Location: Minnesota Age: 33 Posts: 60 Trader Rating: (4) Feedback Score: 4 reviews	if the guide was in the pan theres no way it could of made it through the strainer, pump, filter, etc. There's something else going on.

12-01-2016, 10:37 PM	#18
zylvia213 Nissanaholic! Join Date: Aug 2007 Location: LOST ANGELES Posts: 1,975 Trader Rating: (36) Rides Gallery: zylvia213 Feedback Score: 36 reviews	something was dropped in when the motor got assembled???? __________________

12-02-2016, 09:50 AM	#19
Kylepaschke Leaky Injector Join Date: Oct 2006 Location: Minnesota Posts: 149 Trader Rating: (13) Feedback Score: 13 reviews	lol so what the fuck happened? your engine grew an additional guide?

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