R51 OIL LEAK

JAHBLESSINGS · Postby **JAHBLESSINGS** » Wed Feb 19, 2014 5:31 am

i put my truck on the lift to do my oil change and tire rotation. i noticed the brush gaurd under the bumper has oil on it right below the filter. i say what the heck is this. i use a flash light and see that the oring behind the cooler is leaking (cooler bolt size 22mm). so the part from nissan is like $5.00 or so. its on it's way to me to resolve this oil leak issue. i've done some research and see that it happens to all r51's around 109,000 mile mark and it's easy to change. get ready guys for yours to start leaking also. here is a thread i found about it.
http://www.thenissanpath.com/viewtopic. ... lter+oring

skinny2 · Postby **skinny2** » Wed Feb 19, 2014 6:29 am

108k miles here...i'll be sure to test this theory!

eieio · Postby **eieio** » Wed Feb 19, 2014 7:58 am

53,000 miles here, i'll let you know

Postby **disallow** » Wed Feb 19, 2014 11:09 am

150k miles here, no leaks yet.

Do you run synthetic?

eieio · Postby **eieio** » Wed Feb 19, 2014 11:16 am

if the bolt that the oil filter screws onto comes loose, it will cause the o-ring to leak.
the bolts may come loose from removal of an overtightened oil filter, as the tightness of the bolt is what seals the o-ring between the cooler and the block.

JAHBLESSINGS · Postby **JAHBLESSINGS** » Wed Feb 19, 2014 1:04 pm

disallow wrote:Do you run synthetic?

yes, i only run synthetic. the parts guy at nissan tells me he sells these things like crazy.

JAHBLESSINGS · Postby **JAHBLESSINGS** » Wed Feb 19, 2014 5:08 pm

Old one orange. New one is black. I did not get any photos of the progress since I had my shop foreman do it. Took him about 20 minutes since the lines of the cooler do not have to be removed. The oil filter fitting is really tight so a good wrench is a plus.

Captain Juan · Postby **Captain Juan** » Sat Feb 22, 2014 8:20 pm

My 2005 Pathy just started leaking.....106k miles. Crap. At least its an easy fix. I'll order the gasket straight away.

GodGaveUsTwo · Postby **GodGaveUsTwo** » Sun Apr 26, 2015 4:30 pm

Part Number for the O-Ring?

Postby **smj999smj** » Sun Apr 26, 2015 4:43 pm

Oil cooler "O"-ring is Nissan P/N: 21304-JK20A.

GodGaveUsTwo · Postby **GodGaveUsTwo** » Sun Apr 26, 2015 5:12 pm

Thanks! Couldn't find it for the life of me. Every site that had a schematic of the oil cooler didn't have the gasket on it.

Postby **smj999smj** » Mon Apr 27, 2015 9:36 am

You can get them on the aftermarket, as well. I know Dorman and Victor Reinz has them.

R51 OIL LEAK

R51 OIL LEAK

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