Do you mean to replace the stock oil cooler or add to it?

 

Replace.
The one we have is smal with plastic around it. The RS500 one is double size and full metal.

 

Just by going off of the photos, it looks like it's a Behr W0133-1823637. If that's the case, they look to have been in production for the last 17 years so you could probably find one at a junkyard for a lot less than 300!

 

Thank you for that info!

 

I'm not convinced the taller narrower unit has more cooling surface area than the stock one. It comes down to the rate of heat transfer afforded.

 

RS has same surface & more plates = more heat exchange.

J-velocity, any links at hand?

 

You can just add a B&M oil cooler.
Track proven performance and cost less.

 

OK I have a very specific question about this. The Ford Focus RS MKII B5254T3 Oil cooler is therefore exactly the same mounting dimensions as the B5254T4 one?

 

I would not be surprised. Ford borrowed a lot of technology - including 'our' engines - from Volvo when they owned them.

 

Is it borrowing if you own it?

 

hmm... yes... quite right... touché...

 

 

Volvo Made the engines for the Focus ST Focus RS and Mondeo 2.5T they're all almost identical to the T5 including intake, except the RS thats a bit weirder with some strange mounting bolts and also produces 440NM of torque. Ford literally bought them in (even though it was charging itself essentially).

Ford did more than take technology they kept the Volvo Test Track in the USA (which is supposed to be really good) for themselves....

 

That is what I'm trying to figure out.
If I would get the RS500 cooler for reasonable price, I would be happy to try it.

 

Where is the oil cooler located on our cars? This looks interesting!

 

On the back side of the engine, passenger side.

 

Ah yes i know now! Found picture, here on a Focus RS. It´s not just the RS500 that have this. It´s the same on the RS..

 

I measured the stock cooler, and it is 2 inches high, 3.5 inches high if you include the water tube coming out. The previously mentioned Behr W0133-1823637 can be found here:

http://www.autopartsway.com/PartDetails.cfm?W0133-1823637/BEH

cheaper one here:
http://www.autopartsnetwork.com/shop/-brand_Behr-sku_W0133-ds-1823637.html
but it doesn't list the dimensions.

Note that the first site says cooler is 5.5 inches high, meaning that it is 2 inches thicker. Every site I looked at says this is a stock replacement cooler, but it is definitely thicker than the S60 one.

 

I remember dougy made his own custom oil cooler, I'm sure he can chime in. But which one would be better?

 

Did anyone ever try to fit the rs cooler?

 

I hope everyone knows that engine oil has a desired temp in the 210-225 range. If you aren't racing or have a partly clogged cooler then you may be doing something bad while you think you are doing something good. Oil needs to get warm and shed water and fuel that gets into oil during engine warm up.

 

"Ideal for fitting to a Focus ST as these cars suffer from cracked liners due to excessive heat build up, This will help in keeping the oil temps stable when running aftermarket software upgrades."

So I think it would help not hurt. It should keep the oil from getting to hot.

 

Same motor but a different oil cooler which has a Volvo sticker on it. I'd say it's OK to use it on an R that gets hammered all the time but might be overkill for a car that's driven by a soccer mom.

I'm also very curious about what the normal operating temp is with the 'regular' cooler and with this larger cooler.

I look at this bigger cooler sorta like a preventative maintenance part; if it'll help make the engine last longer I see no reason why everyone shouldn't use it. Granted, people in Fargo may not want to use it in the middle of winter but I think you get where I'm coming from.

 

I look at this bigger cooler sorta like a preventative maintenance part; if it'll help make the engine last longer I see no reason why everyone shouldn't use it. Granted, people in Fargo may not want to use it in the middle of winter but I think you get where I'm coming from.

It is only preventative maintenance if you do it right and your oil reaches normal operating temperature. If you were to install a larger cooler it is a must to have an oil temp gauge to ensure oil is getting to its proper operating temperature, and I highly suggest not skimping out and installing an oil cooler thermostat as well. Cold oil has does not flow or lubricate correctly and like it was said before oil has to reach 215* to shed water and lubricate properly. By installing a larger cooler and always running cold you are doing your engine a disservice.

So if you were going to install the larger RS oil cooler, you would likely be fine reaching operating temp but I would definitely watch temps closely with a gauge assuming you wouldn't want the added hassle of installing a thermostat since the whole point of going with the RS cooler to begin with is to get better oil cooling without having to create new lines and move the cooler.

 

I guess I will be the first R to try this out.

 

After talking with a guy in the uk who sells them he said getting up to temp is not a issue it just keeps it from getting to hot. They use them on the focus over there that are modded so the sleeves dont crack. So I would say if your tuned and have mods this will just prevent the oil from getting to hot but will not cool the oil to much it will keep it stable. So I'm going for it I have not seen Dougy say he has a problem with his and he has a sick aftermarket dual setup.

 

Anyone know if the oil temp is available via ODBII? It would be cool to setup Torque to keep an eye on it - if it's available, of course. I'm not near my R so I can't find out at the moment.

 

I want to say no, but I don't remember. I'll check later today.

 

I had a B5234T3 engine with an oil temp gauge. Hottest it ever got in 80+ degree day was about 200-205 degree F. And once I slowed down, it dropped 20 degrees in a minute or less.

 

here you go trav
http://j-w-racing.co.uk/product.php/8289/2924/dreamscience_oil_cooler_kit___ford_focus_st

 

That's quite an expensive item. I picked up this kit for my Miata years ago and a lot less $$ and it includes a oil filter relocator: http://ecommerce.mossmotors.com/p/miata-mx-5/oil-cooler---filter-relocation-kit-by-cobalt/902-120?CategoryPath=All+Products%2F%2F%2F%2FMazda+Miata%2FMX-5%2F%2F%2F%2FUserSearch1%3Dsrc_results%2F%2F%2F%2FAttribSelect%3DManufacturer%3D%27COBALT%27

Now I'm not saying this kit is something that'll fit on a Volvo engine but you sure don't have to spend so much coin for the same setup. I'm sure a little Googling will come up with something that'll save you some coin.