The original watercooled oilcooler, mounted on the engine block under the oilfilter, is sometimes creating a problem and has to be removed. It could be a problem with the function, available space etc. In my case the reason is a heavily tuned engine with high boost pressure. This create a very high local temperature rise. Let us call it a local thermal water explosion. This local temperature rise create a high local pressure in the cooling system and this could make the original oilcooler crack and cause a water/oil leak.
There are some ways to solve this problem, this is how I chose to do it:
Original oilcooler is hidden under the intake manifold and behind the alternator.
Original oilcooler. It is mounted on the block with 4 bolts.
Here it has been dismounted.
A close up to show how it looks behind the oilcooler. It is important to remove all trace of old gaskets and paint. The mating surface must be smooth and clean since this is the surface where the oilfilter/sandwich plate is sealing snug and tight.
In the centre you can spot the original stud. This is to be dismantled (twist it out like a screw).
Original stud dismounted.
In Nissan FAST software, part 15213P is found. This part is only used on engines without an original oilcooler mounted on the engine block.
It is named "Stud, oil filter" and Nissans part number according to Nissan is 15213-W040A. I have ordered one and will test it to be 100% sure it is the correct part.
The valve I will mount in the filter holder.
Stud, 15213-W040A, mounted in the block (the four bolts and the gasket shall be removed).
Now you can select if you would like to use only a filter, an external oilcooler, a filter relocation kit or a combination with all of them.
I use them all.
Oilcooler thermo plate.
Mounting an oilcooler and a thermo plate.
Filter relocation kit.
