I would like to say yes, and you are certainly welcome to try it, but remember that Mazsda is a small car company, and in these troubled financial times, and the fact that it does take much money from Ford any longer, and the fact that they are not known for the best customer service in the first place, you are not liable to get anywhere with that.

But yes, installing the $35 spin-on adapter from a 3i I listed above is liable the be the best (re: cheapest/easiest) way to go.

I used to own Volvo's back in the day, several were P1800/1800S cars used to have an oil cooler similar to this one. It mounted between the block (side mounted filter) and the oil filter and was relatively small. I could never quite figure out why they did that since they used the exact same engines and transmissions as they did in the sedans of the period and they never came with it. Seemed rather silly and useless to me. One mounted in front of the radiator would have been the better choice, IMO.

 

Just recently had this same issue and removed the oil cooler (actually removed the whole assembly), cleaned it up and used some Toyota "black" oil pan sealant (U can use RTV).

Basically clean everything up (I used brake cleaner). Apply thin coat of sealant to one side of the O-ring (which really doesn't look like an o-ring... more like a gasket) and place back onto the oil cooler. Apply a thin coat of sealant to the other side of the o-ring/gasket and fasten the oil cooler to the top of the filter housing. Reattach the housing to the engine and let sit for 24 hours (let the sealant cure), before adding oil and enjoying a cleaner driveway.

I searched for ANY potential replacement o-rings and got nowhere. Used sealant and it's been fine for about 1K miles so far.

 

hey I know this is an old thread but i had the same problem on my '07 Mazda 5, I just fixed it today. After fixing it i took it out and beat it to see if i could make it leak or fail but it seems good. Anyway I removed the oil cooler and took it to O'Reilly auto parts and searched through the seals I could find. I used an oil filter gasket off of a Microgard MGL2 oil filter and two of the largest seals from a drain plug gasket set 65280. I stacked these on top of each other as the center brass piece of the original gasket was thick enough to retain both together. Plus they are hard fiber gaskets so they were secure when tightened and also thin enough to compress the (oil filter) outer gasket to seal well. Also I right stuffed (silicon sealer) the gaskets together and the the cooler. Anyway if I find a better solution I will post it, or if it fails or I have any problems with it.

 

Ok so it started leaking again, its leaking from the bolt that secures it through the center, so the seals I used around the bolt apparently aren't going to work. So Im going to see about getting the spin on filter replacement adapter so I can eliminate the cooler. I did a CAD draving of the gasket and am going to see what a machine shop will charge me to build it out of aluminum, then use RTV silicone on each side so I can leave the cooler on the car. Not that I really think it does much good, but coolant @ 200deg is usually cooler than oil, and its in phoenix.

 

OK, Mazda 5, 2.3L oil is leaking at Oil Cooler gasket. Without right seals we can not stop the oil leaks. Do not use silicone or try to modify with similar gaskets because you will waste your time. Oil still leaking. Need to use:
1/. Oil Filter Stand Gasket (Part#LF02-14-342) (Flat thin rectangular shape)
2/. Oil Cooler Gasket (Part#LF8X-14-702) (2 O ring one big 1 small, connect together with a straight line. Like steering wheel)
The 1/. Oil Filter Stand Gasket you can buy at the dealer but 2/. Oil Cooler Gasket is not available. You may find on eBay someone lists the same part No. I bought it, find out this part looks similar but it is not thick enough. I just waist my time and money for this gasket.
The end, I had to buy the whole oil cooler housing. (Original part number LFD7-14-700 becomes LF6W-14-700A. THE SEAL IS NOT SOLD SEPARATELY List price $429.64)

 

Does anyone know if a 2006 Mazda MPV would have the same problem? Mine is leaking oil, running down the oil filter in a stream when the engine is running, but it is difficult to see above the filter and determine the origin.

 

is it a 2.3L?

 

@eg-Rat I am pretty sure it is a 3.0L.

 

it’s probably different than the 2.3, which had the stupid cooler design. But it’s a common place to develop leaks on any motor. Clean it really well, I usually use degreaser and a pressure washer. Avoid the electronics. But if it causes a issue, driving through a puddle could too. Then let it idle if it’s a bad leak. If it’s small check it every day after you clean it. A mirror on a handle would be helpful too.