How to Replace your Oil Cooler Ring

Member Credit: KZ 259

1. Drain out oil and coolant. drain the coolant as much as possible because it will drip for a while after the majority is out.

2. Remove oil filter

3. Take a 22mm socket and break loose the nut/bolt (its a bolt with a hex on it) holding in the cooler. its best to get a de-greaser of some kind and wipe it dry so the socket doesn’t just slip. once you break it loose, keep loosening it and take out the nut/bolt

4. More oil will come out (not much more) and here is the MESSY part. there are two tubes coming out of the oil cooler. these tubes contain the remaining coolant that did not flush out from the radiator. once you remove these two tubes coolant will come out and a good amount of it so have your coolant container ready and try to aim the hose to the bucket, but it will be difficult. 9/10 times the coolant will mix with the oil and make the coolant unusable so have a fresh gallon of it ready.

5. Once the cooler is out, the O-ring will be on the other side. mine was red and the new one from nissan is black. i dunno if thats normal or whatever. simply get the old ring out, place the new one, clean the cooler if you want and you’re done with this part. now reverse the install, fill the motor up with oil and put coolant in the radiator, tighten down every and double check on it and you just saved yourself a good deal of cash!!! lol