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.:help:

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.

http://lh5.ggpht.com/_sa8XyH_gcZc/Sr...0/P9114889.JPG

Is that above the oil dipstick insert?

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

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.

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.

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.

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.htmlhttp://i17.photobucket.com/albums/b56/cirgriff/CPS.jpg

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

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

Update
 

Okay so I have replaced the O-ring in the CPS. The oil leak has seem to stop but there were 2 reasons I wanted to replace the O-ring. 1 of course was the oil leak the other was smoke would rise from that general area. I thought ok its because of oil leak. Now when I start the car, let it run and warm up everything seems to be fine, until I turn the car off once I trun car off it starts to smoke in that area and it dosent smell like oil it smells like plastic burning. I checked inside of the dust cover to see if any oil leaked into CPS and theres nothing also thought the reason why there was no smoke was because of the fan turning on blowing the smoke to back of engine i used a red laser to see if i could see any kind of smoke at night time and there was no smoke. Anyone have this problem at one time or another? Or know what it could be?

By the way from start to finish it only took 2 hours, and i was taking my sweet time with it. rather easy fix! :bigthumb:

just a thought, are you still running this showing no oil pressure? have you verified that this is a faulty reading at all as you'll kill the motor if there really is no oil pressure...

My immediate thought with the two problems though would be the oil pressure sender, which is the silver part just below the freeze plug in the above pic. if this is loose/damaged oil could be leaking from here & not registering the pressure correctly. Get that fixed ASAP as the oil pressure & water temp gauges are the 2 most important on any motor IMO... ;)

I got that fixed at the same time as the CPS. I recur the wire and scratched up the inside of the connector just to see if the could be the problem and it seems to be working now.

good good, manage get the leak sorted too?

Lol well I bare all bad luck!!!!:mad:
I did manage to time it better than it was before by hand, but it's still leaking oil I think it's coming from the turbo line it just makes sence from all I see plus i had 2 bad cats and the car was never times right and I drove it for about 20+ hours before I got the cats fixed and just now timed it right so it might of been some way building from a slow leak to what I have now over a 5 month span I have noticed these turbos are real touchy!!!

Hey guys just today, my oil pressure gauge is on zero while running and my check engine light is on and off, do you think I had the same problem? what is the best way to check it myself? or i can bring it to any mechanic shop? thank and any advice is highly appreciated. Please Help

Its 1988 7mgte, thanks.

run a diagnostic for your check engine light.. instructions are in the faq.

i think that diagram is showing the o-ring that goes on the back of the shaft not necessarily in front of the gear cause look how it has a diamond on it i think its just pic to show you the parts involved with the piece.