oil pressure & oil leak damn 7m!

aamt07 · 10-22-2010, 04:37 AM

I have a 91 supra 7mgte, I have been doing most the work myself. I got a jdm 7mgte engine cahnged some gaskets and 4 months later I have a problem with an oil leak! it's coming from the front passenger side below header there are so many wires i cant see where exactly its coming from anyone have a pic of a engine pulled that would show hoses, and from front of turbo to the front of the engine below headers? I have not had a good oil pressure as long as I have had the car the gauge will work on RPMs higher than 2800 but will be at zero at idle or when driving at lower than 2800 rpms.

bioskyline · 10-22-2010, 07:41 AM

aint alot on the side of the block, oil send/return to the turbo, oil filter, dipstick tube and oil pressure sensor. its probbably the tuurbo oil drian thats leaking.

aamt07 · 10-22-2010, 08:33 PM

Is that above the oil dipstick insert?

bioskyline · 10-22-2010, 08:37 PM

yes it is. also check the oil filter that its not leaking. its a pita to change one...

suprajim · 10-23-2010, 10:28 PM

You should check the o-ring on the cam position sensor. Oil can leak out of there and drip down to the exhaust manifold or get blown back by the fan. It could also be valve cover gaskets or cam seals. Those are common problems. After checking those, I would look at the oil pressure sender and the turbo oil line seals.

As far as your oil pressure, once warmed up, you should be at 4-7 psi at idle and 35+ at about 3000 RPM.

aamt07 · 10-27-2010, 08:06 PM

Okay 2 questions in 1, if i was to take off the cam position sensor (1.witch is infront of the engine behind the powersteering res) 2.not knowing what im doing could i mess up the engine as far as not putting it back in right? i can see now that i do have a leak from there but im sure i have more than just that one leak.

suprajim · 10-28-2010, 01:35 AM

http://www.cygnusx1.net/Supra/Librar...aspx?S=IG&P=21

This will show you how to remove and reinstall it. I would also mark the position of the bolt with paint or something as it will help you to get the timing set right (or pretty close) after reinstalling. I definitely would check the timing afterward, just to make sure all is good. It's easy to be off a tooth after reinstalling. You can't really "mess up the engine". It will just run like crap, if at all, if it isn't installed correctly.

If you remove the accordian hose, you should also check the oil pressure sender and the copper crush washer on the turbo oil line as you will have easy access to them. These are a couple other places that could possibly be leaking.

aamt07 · 11-10-2010, 06:52 AM

Okay I think I have everything I need but I have one more question in the CPS diagram from the Cygnus website that SupraJim posted (right above this post) It shows an o-ring at the end of diagram now correct me if im wrong but thats not where the O-ring goes correct? it goes here right? Or does it have one on the other side of gear on the shaft(@end far left of pic) and one on right where it says O-ring in yellow? Original post by Bill UK.. http://www.toyota-supra.info/forums/...on-sensor.html

btwilson86 · 11-10-2010, 07:03 AM

There is only the one o-ring, and it goes exactly where it is in that image you posted, after the gear and alignment teeth

aamt07 · 11-10-2010, 07:43 AM

OK, cool thanks! whats up with this small o-ring and why is it at the back of the CPS shaft in the diagram in this link?

http://www.cygnusx1.net/Supra/Librar...aspx?S=IG&P=21

10-22-2010, 04:37 AM	#1
aamt07 Stock Join Date: Oct 2010 Location: houston, Tx Posts: 24	oil pressure & oil leak damn 7m! I have a 91 supra 7mgte, I have been doing most the work myself. I got a jdm 7mgte engine cahnged some gaskets and 4 months later I have a problem with an oil leak! it's coming from the front passenger side below header there are so many wires i cant see where exactly its coming from anyone have a pic of a engine pulled that would show hoses, and from front of turbo to the front of the engine below headers? I have not had a good oil pressure as long as I have had the car the gauge will work on RPMs higher than 2800 but will be at zero at idle or when driving at lower than 2800 rpms.

10-22-2010, 07:41 AM	#2
bioskyline 3" Exhaust Join Date: Oct 2010 Location: powell river bc Posts: 120	aint alot on the side of the block, oil send/return to the turbo, oil filter, dipstick tube and oil pressure sensor. its probbably the tuurbo oil drian thats leaking. __________________ 87 silver turbo targa, bone ass stock (for now)

10-22-2010, 08:37 PM	#4
bioskyline 3" Exhaust Join Date: Oct 2010 Location: powell river bc Posts: 120	yes it is. also check the oil filter that its not leaking. its a pita to change one... __________________ 87 silver turbo targa, bone ass stock (for now)

10-23-2010, 10:28 PM	#5
suprajim Intake Join Date: Jul 2009 Location: Dallas, TX Posts: 36	You should check the o-ring on the cam position sensor. Oil can leak out of there and drip down to the exhaust manifold or get blown back by the fan. It could also be valve cover gaskets or cam seals. Those are common problems. After checking those, I would look at the oil pressure sender and the turbo oil line seals. As far as your oil pressure, once warmed up, you should be at 4-7 psi at idle and 35+ at about 3000 RPM. __________________ 1992 Supra 7MGTE A/T w/Sunroof Super Red/Shadow Gray

10-28-2010, 01:35 AM	#7
suprajim Intake Join Date: Jul 2009 Location: Dallas, TX Posts: 36	http://www.cygnusx1.net/Supra/Librar...aspx?S=IG&P=21 This will show you how to remove and reinstall it. I would also mark the position of the bolt with paint or something as it will help you to get the timing set right (or pretty close) after reinstalling. I definitely would check the timing afterward, just to make sure all is good. It's easy to be off a tooth after reinstalling. You can't really "mess up the engine". It will just run like crap, if at all, if it isn't installed correctly. If you remove the accordian hose, you should also check the oil pressure sender and the copper crush washer on the turbo oil line as you will have easy access to them. These are a couple other places that could possibly be leaking. __________________ 1992 Supra 7MGTE A/T w/Sunroof Super Red/Shadow Gray

10-22-2010, 08:33 PM	#3
aamt07 Stock Join Date: Oct 2010 Location: houston, Tx Posts: 24	Is that above the oil dipstick insert?

10-27-2010, 08:06 PM	#6
aamt07 Stock Join Date: Oct 2010 Location: houston, Tx Posts: 24	Okay 2 questions in 1, if i was to take off the cam position sensor (1.witch is infront of the engine behind the powersteering res) 2.not knowing what im doing could i mess up the engine as far as not putting it back in right? i can see now that i do have a leak from there but im sure i have more than just that one leak.

11-10-2010, 06:52 AM	#8
aamt07 Stock Join Date: Oct 2010 Location: houston, Tx Posts: 24	Okay I think I have everything I need but I have one more question in the CPS diagram from the Cygnus website that SupraJim posted (right above this post) It shows an o-ring at the end of diagram now correct me if im wrong but thats not where the O-ring goes correct? it goes here right? Or does it have one on the other side of gear on the shaft(@end far left of pic) and one on right where it says O-ring in yellow? Original post by Bill UK.. http://www.toyota-supra.info/forums/...on-sensor.html Last edited by aamt07; 11-10-2010 at 08:16 AM.

11-10-2010, 07:03 AM	#9
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	There is only the one o-ring, and it goes exactly where it is in that image you posted, after the gear and alignment teeth __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

11-10-2010, 07:43 AM	#10
aamt07 Stock Join Date: Oct 2010 Location: houston, Tx Posts: 24	OK, cool thanks! whats up with this small o-ring and why is it at the back of the CPS shaft in the diagram in this link? http://www.cygnusx1.net/Supra/Librar...aspx?S=IG&P=21 Last edited by aamt07; 11-10-2010 at 07:45 AM.

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