bnr34rb26dett

iTrader: (29)

So i was looking at a friends built evo over the weekend and we happened to notice that it didnt have the stock oil cooler anymore. In fact, it didnt have any kind of oil cooling device
I was just wondering what the advantages/disadvantages are for doing this??
is there a good thread on installing/choosing an oil cooler?

TurboTravis

iTrader: (6)

The only "advantage" would be a small weight loss...

People remove it because they hurt the stock motor (which contaminates the cooler), and their friends/shops on here tell them than an oil cooler is not needed, because their cars 'run ok' without one.

But, bottom line, street driven Evo's need oil coolers, period. I've monitored temps with and without a cooler-my oil after a single 3rd/4th gear pull without a cooler were 230 degrees in 70 degree ambient temps. With a cooler, 180. 230 is fine, but I'm sure that guys without a cooler are seeing 250++ during tuning sessions and/or hard driving. Simply too hot. You can piece together an oil cooler for 200 bucks.

My03evo

iTrader: (1)

But what about in the winter.....Unless the oil coolers have a built in thermostat to restrict flow going to it until it gets hot then I see it hurting the motor in the winter since it's keeping the oil colder and over time I'm sure is putting wear on the bearings and everything else that depends on oil to protect against friction since oil takes longer to get everywhere when its colder/thicker. I had started mine last night when it was very cold and it did not sound pretty at all, after about a full minute the noise was finally gone....I wouldnt want to imagine it taking longer when theres a cooler trying to prevent the oil from getting hotter.

So basically, does the cooler have a thermostat in them? If not then I don't plan on putting one back on....I got the car without one since the previous owner blew the motor.

TurboTravis

iTrader: (6)

I don't run a thermostat since my car is not a DD. You could add one if you wish. IMO, as long as your oil is hitting 140 or so, you're fine. Cold start performance is dependent on weight. In a winter use Evo, I'd have Rotella 5W40 in it.

okevolutionVIII

iTrader: (71)

I bought a STM Oil Cooler Delete Kit as my first oil cooler was junk due to a blown engine and the 2nd one is now junk as my motor locked up, trashed bearings and bent the crank during it's first start up as a shop installed the thrust bearings backwards. I will install a new oil cooler once I know the motor is in good shape.

4RETECH

iTrader: (86)

Yes, but the stat is not in the cooler. It's in the oil filter adapter.

http://www.lancershop.com/customer/p...&cat=93&page=1

Here is an example of a replacement one just to show what it looks like.

To the OP: people remove them because they either crashed the car on the right front and/or damaged the internals in an engine thus contaminating the cooler with metal.

JohnBradley

iTrader: (30)

Oil temps are normally 20* on the hot side of coolant temp. We have monitored with and without and oil cooler and it seems it stays pretty constant. Luke didnt have an oil cooler on his aluminum rod street motor and it went almost 20k before he pulled it (its still together, he switched to the 2.4).

Our 8 second Eclipse starts off with oil temps around 180-190, clicks off a pass, and the oil temps are around 210. It has a solid block with coolant just in the cylinder head.

Oil coolers are needed in my opinion for-

Road racing

Extended street pulls

Solid block motors on the street

Aaron

JDMevoBOOST

iTrader: (37)

Hmmm I've seen as high as 220-230 with the stock cooler. That is during tuning or track days though. Generally on the street it doesn't go above 210.

JohnBradley

iTrader: (30)

Thats what I am saying though track days are different. It wouldnt surprise me that fuel makes a difference. E85 cars run cooler EGT which normally also means lower CHT and would be lower oil temp. I am putting a temp gauge in my car for its 2012 freshen up so I can have some better data.

GregM

iTrader: (1)

The Airtrek has the same engine as an Evo and comes factory without an oil cooler. It even has a different oil filter housing with no ports, so an Evo oil filter housing needs to be fitted to add the oil cooler. I guess this filter housing I have sitting here could be worth something to those of you that don't want to run a cooler.

My03evo

iTrader: (1)

ahh ok, I always wondered what that big hex plug was in the oil filter housing.

and yeah I am currently running 15w40 but changing to the rotella t 5w40 synthetic today or tomorrow, plus I have a couple gallons of it when advance had a sale on it for like 13 bucks each gallon or something

Chu's Mom

iTrader: (6)

Aaron, what would you consider an extended street pull? Anything more than a 1/4 mile?

JDMevoBOOST

iTrader: (37)

I would consider more than 6-7 seconds an extended street pull. Usually those 100 MPH+ runs that we all do in Mexico from time to time

JohnBradley

iTrader: (30)

up to 30 seconds with over half of that in 5th.


...in mexico or on my personal closed course.

David Buschur

iTrader: (53)

Agreed 100%. We delete a LOT of oil coolers on cars that come in with blown up engines. Biggest reason, cost. Weight savings doesn't even cross our mind, it's the cost of the cooler and the chance of it trapping more crap. I ran a hard blocked 2 liter for a few years, no oil cooler and no water in the block. I also ran an oil temp gauge, NO issues what-so-ever.

You have to be careful what information you use on this site and what information you don't......