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Discussion Starter #1
I’ve been having oil leak from my engine while running for a while now. Yesterday I took off the plastic covers and wiped up all the oil I could see and ran the engine. I checked the oil pump side near the crank pulley and didn’t see any oil coming from there. I Also confirmed the oil pan is not leaking.

It looks like it’s dripping from below the oil filter (not at the oil filter, but below it) while running the car I could watch the oil Begin to trickle down that area. There is oil on the underside of the intake manifold as well, but I’d imagine oil can fly everywhere while driving down the road.

See the attached pics. I had trouble finding videos or other posts where people had the same problem.

Two questions: 1. is there anywhere else oil could be leaking from where it would pool up at this location? 2. If it is the oil cooler, does anyone have a write up on how to replace the seal?

thanks!
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1998 Rav4, manual transmission, 2WD, JDM engine installed in 2013
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For removing and installing the oil cooler, see pages LU-18 thru LU-20 of the attachment. Page LU-20 speaks of installing a new o-ring and a new gasket. The drawing below is from McGeorgetoyota.com:
152003


Part #15 = Oil Cooler Assembly
Part #17 = Cooler Assembly O-Ring, OEM part #90301-58002 (comes with cooler)
Part #18 = Engine Oil Cooler Gasket, OEM part #90201-25007

Triple check the part numbers, please.

Edit: Page LU-17 of the attachment states that #16 gets 58 ft-lbs of torque.
 

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Discussion Starter #6
Started getting things apart. Anyone know what size the bolt is holding the cooler? PN #16 in that diagram. I’m gonna go out and buy a socket but would hate to have to make multiple trips. Couldnt find out online
 

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1998 Rav4, manual transmission, 2WD, JDM engine installed in 2013
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P/N #16 is the oil cooler relief valve assembly, OEM P/N 15695-74010. No guarantees, but signs are that this takes a 30mm socket.

The Rav4.1's four spark plug tubes have large nuts that also use a 30mm socket. The socket may be worth buying.

Some report a 24-inch breaker bar and a lot of torque are needed to free the relief valve.

For the archives, here are three videos that explain replacement of the oil cooler gasket on Toyota circa 1990s 5SFE engines:




(The 5SFE has many similarities to a 3SFE.)
 

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Discussion Starter #8
I appreciate all the help guys. I finally finished up changing the gasket. Drained and refilled the coolant, changed the oil, and reinstalled the oil cooler with the new gasket (the old one was rock hard) #16 was in fact a 30mm bolt, went to northern tool to get a socket.
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It definitely was leaking oil from the cooler, you can see in the image where there was a gap in the gasket. Time will tell if this fixed the leak over all, I’m sure there’s a leak elsewhere on the engine I’ll end up finding. Again, thank you for the help!
 
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