Oil Cooler kit.?

Risky · Post by **Risky** » Mon Mar 21, 2011 8:12 am

I'd like to fit an oil cooler kit to help keep temps under control. I've got my eye on this one, any advice regarding what one to get?
They have various sizes available, is bigger better?

Going on standard 3.5, no real mods, basic motor into Toyota Hilux.

Link.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT

Ian Anderson · Post by **Ian Anderson** » Mon Mar 21, 2011 8:40 am

Looks OK but I'd probably go with a thermostat ccontrol and bigger cooler

see also think Automotive
http://www.thinkauto.com/

IAn

Risky · Post by **Risky** » Mon Mar 21, 2011 9:14 am

Ian Anderson wrote:Looks OK but I'd probably go with a thermostat ccontrol and bigger cooler

see also think Automotive
http://www.thinkauto.com/

IAn

Thanks Ian...larger cooler for sure and controller..Thanks for that, and I like the look of the link you gave me, cheers.

kiwicar · Post by **kiwicar** » Mon Mar 21, 2011 10:36 am

Hi
If it is a standard 3.5 and you don't have a full width/length undertray you an oil cooler is not needed, infact I would think even with a thermostat the oil cooler is unlikley to be in circute for more than about 30 seconds even after very hard acceleration in low ratio, and probably never under normal use. All you will do is reduce the oil flow available to the engine under normal use. If you are that worried make sure you put in an air deflector to direct a little extra cooling air at the sump and don't run the exhaust collectors too close to the sump (maybe even put a heat shield between exhausts and sump).
Best regards
Mike

kiwicar · Post by **kiwicar** » Mon Mar 21, 2011 10:41 am

Hi Again
I've just looked at your build photos, the exhausts are miles away from the sump, the sump is dangling in the breaze under the car right in the air flow, and you have lagged the pipes anyway, plus the engine bay is huge , you may have an issue with the oil not getting properly hot, not needing to cool it down!

Best regards
Mike

Risky · Post by **Risky** » Mon Mar 21, 2011 1:30 pm

kiwicar wrote:Hi Again
I've just looked at your build photos, the exhausts are miles away from the sump, the sump is dangling in the breaze under the car right in the air flow, and you have lagged the pipes anyway, plus the engine bay is huge , you may have an issue with the oil not getting properly hot, not needing to cool it down!
Best regards
Mike

Thankyou VERY much for your advice Mike.
I've read about issues with overheating and I thought it possibly a good idea to go with this...but after reading this I think that you may be correct about the breeze passing through easily.
Cheers guys...that's saved me a few quid I can put towards another few bits

Post by **katanaman** » Mon Mar 21, 2011 5:36 pm

overheating is very rarely a problem with oil temps on the RV8 and is more likely to be a problem with water cooling. The big tuned engines can make use of an oil cooler but stockish motors rarely do as per what Mike said.

RoverP6B · Post by **RoverP6B** » Tue Mar 22, 2011 1:16 am

I have a 13 row engine oil cooler fitted to my 4.6, and find it excellent. Mind you, I live in Australia where the temperatures are in most of the country for most of the time hotter than those experienced in Europe and the U.K.

It is 23 degrees C here today and I have just been out for a run over 60km, and being in the country 100kph (60mph) running. Coolant temperature was essentially 85 degrees C while engine oil temperature as measured in the sump was in the 90 to 95 degree C range for the most part. It usually does not take too long for the oil temp to reach 80 degrees C so it is not cool for too many miles.

From what I have read, the optimum engine oil temperature is in the range of 82 to 93 degrees C.

On really hot days when the ambient temperature is around 40 degrees C, engine oil temperature is typically 100 degrees C.

Without the cooler and in similar conditions, engine oil temp was typically approaching 125 degrees C (with my original 3.5 litre engine), so a big benefit from using the cooler as far as I am concerned.

Ron.

Risky · Post by **Risky** » Tue Mar 22, 2011 6:37 am

RoverP6B wrote:I have a 13 row engine oil cooler fitted to my 4.6, and find it excellent. Mind you, I live in Australia where the temperatures are in most of the country for most of the time hotter than those experienced in Europe and the U.K.

It is 23 degrees C here today and I have just been out for a run over 60km, and being in the country 100kph (60mph) running. Coolant temperature was essentially 85 degrees C while engine oil temperature as measured in the sump was in the 90 to 95 degree C range for the most part. It usually does not take too long for the oil temp to reach 80 degrees C so it is not cool for too many miles.

From what I have read, the optimum engine oil temperature is in the range of 82 to 93 degrees C.

On really hot days when the ambient temperature is around 40 degrees C, engine oil temperature is typically 100 degrees C.

Without the cooler and in similar conditions, engine oil temp was typically approaching 125 degrees C (with my original 3.5 litre engine), so a big benefit from using the cooler as far as I am concerned.

Ron.

Australia....hmmmm? any room for another Pom with a Toyota RV8?

Here in the crapppy UK where a dark cloud hangs above most peoples heads thesedays, temperatures are not gonna hit Australias levels even with the global warming (scam)!
I'm leaning towards not getting one after previous comments, I think it's a case of see how it goes and get one later if needed.
There's plenty on the market and with any luck a decent one will turn up at the right price at custom show or something like that.
Enjoy the sun

john 215 · Post by **john 215** » Tue Mar 22, 2011 3:04 pm

Hi,

I run a 13 row cooler on my 4.6, thermostat take off between filter and housing using 5/8" hose, rather than the 1/2 inch you see in some kits, to ensure enough flow, made a difference on mime with hot oil pressure.

The hoses i made mysef using Aeroquip push fitting.

Cheers John