Anyone fitted an Engine Oil Cooler to a 1uzfe??

[earthman]

Greetings all,

I am thinking about fitting an engine oil cooler with smallish thermofan to my 4runner/1uzfe to give a bit of longevity to the working parts and was wondering if anyone out there had done this with a 1uz, as I could not seem to find anything substantial during a search. I have a few questions:

- What size cooler is about right for the 1uz?
- What style is better? Tube and fin or stacked plate?
- What temperature should the oil be at normal operation with a 1uz? Does 93C(200f) to 105C(220f) sound about right?
- Using an oil cooler, is there much of a cooling effect on coolant and engine temperatures? If so to what extent?
- What is a decent/respectable oil cooler brand to go for? I was thinking of going PWR, B&M or permacool, does anyone know of better brands or kits?
- Finally, have you got any happy snaps or diagrams of your set ups? A picture tells a thousand words!

thanks

EM

 

[sniper]

For off road use, with the engine at lower revs and lower speeds, the tube/fin might be better. Fit the biggest one you can :biggrin: Use at least 3/8 size hose.
All the brands you named off are good, B&M is one I personally would look for.

If you use a sandwich plate adapter that goes where your oil filer screws on, like this,



be careful of that center fitting that holds the sandwich plate on, and holds the oil filter on, coming loose after you do a few oil changes and are twisting that oil filter on and off again and again.

 

[gloverman]

Hello

I have a oil cooler on my surf. Helps heap to keep the oil temp down. I used my ECU to monitor my oil temps and after extended periods on boost the oil temps would come up lots. Ill dig up some photos. I also have a adaptor block for non a/c vehicles with oil cooler adaptors.

Cheers

 

[earthman]

Thanks guys,

Been doing a bit of reading and have only read good things so I think I will do it. I already have a remote oil filter setup and the oil hoses go across the front of the vehicle under the radiator, so it should not be hard to tap into them for the cooler.

I plan to mount the cooler with the inlet/outlet facing up and drain and fill the cooler as well as the sump during oil changes to try to assist new oil flow and get pressure up quickly. But will the 1uzfe oil pump struggle or sap HP pushing a thick liquid like engine oil through all the extra hose length (approximately 3 metres/10ft) plus the cooler?

 

[sniper]

If you have a remote filter setup, your half way there! Just as you said, just run the cooler inline. Adding more oil and lines is always a concern, but the benefit is going to out weight those things. And if your doing this on an off road project, it's going to help even more because of the relatively low amount of air flow over the motor. A hard working engine with low air flow over it can't be good.

 

[earthman]

One more question sniper, Would the cooler be better going between the engine and the filter, or filter to engine? I.e.

Engine-----Cooler-----Filter-----Engine,

or

Engine-----Filter-----Cooler-----Engine

I thought the second option with the cooler last in line may be best, the philosophy being the oil is hotter as it goes through the filter (as indicated by the colours), therefore thinner, and may be better for ease of flow.

 

[sniper]

I think your on the right track, you also want the coolest oil going into the engine, making the effect most useful. I would go with your second choice

nice text work btw

 

[cribbj]

I'd also look at the Mocal sandwich adapter; theirs has an integral thermostat, so you're not circulating cold oil through the cooler on startup.

 

[Cobber]

I am running a sandwich adapter with a thermostat. 10% of the oil goes to the cooler all the time then when the temp gets up the thermostat opens to allow 100% through the cooler.

This is the thermostat I'm running http://www.summitracing.com/parts/EAR-503ERL/

Cooler I'm running
http://www.summitracing.com/parts/EAR-41610ERL/

Running all -10 lines.

Works very well and never even got close to getting hot.


Flow is normally, filter then cooler if plumbing separate.

 

[XR8tt]

Yes I guess filter before cooler so hot oil flows better through filter..

Another option ?? If you have clearance etc is to fit a bigger sump. Or weld an inch section [or so] to lower steel section of sump or widened it somewhat.Lengthening oil pickup by same amount..
Or.. Drilling holes in original sump and boxing over, adding capacity and using original sump as a baffle.. The extra capacity helps cool with extra surface area to cool oil etc... Can be somewhat safer than external oil lines breaking etc..
I had a Rallycross Escort years ago.. Always had issues with oil lines leaking breaking due to severity of rallycross.. When we went back to winged sump and NO oil cooler we had less issues with oil surge AND leaking oil lines...
Like the lower section of these sumps on 1US steel section..
http://highenergy.com.au/index.php?module=Website&action=Text&content=1104297571089-4102

 

[earthman]

Some great replies and links here guys, giving me plenty to think about, thanks!!!

XR8tt, I did think of putting fins on and extending the sump and that would have been ideal but because of clearance issues with the steering stabilizer this was not an option.

Cobber: thanks for the pics, links and details of your setup! Wish mine was that neat!!!

cribbj: A thermostat is planned for the cooler months and for when I have some $$$

Everyone: How long do you think I can make the oil lines? They are half inch inner diametre and I had planned on making the entire oil filter/cooler loop about 3 to 4 metres (13 ft) long, is this too long for the stock oil pump to handle?

I have two locations i am considering for the cooler at the moment, the first is behind a 5mm thick aluminuim bash plate up the front and the second is mounting it on the body under the drivers or passengers seat with a 10 or 12 inch thermo fan mounted to it for air flow. Not ideal locations, i know, but real estate at the front of the vehicle is hard to come by as anyone who has done one of these swaps into a 4runner/surf will tell you!

Will the planned 3 to 4 metre (13 ft) length of oil hose have a negative effect on oil pressure or be too much volume/length to handle for the stock oil pump?

 

[gloverman]

My oil pressure dropped when I fitted my cooler. It was in the LHF of the vehicle so my lines where quite short. I have photos some where. Ill try and find them. Cheers

 

[Cobber]

My set up runs 90 psi on cold start up and 40 psi on hot idle. Normal highway running is 80 psi.

For the long runs you plan I would use -10 5/8" hose & fittings and you won't have any problems.

What are your oil temps now?
If you are worried about temp just go to a full synthetic oil they handle the heat fine.

 

[earthman]

FYI, the oil circuit on a 1uzfe....

 

[pierre506]

Grex oil cooler， I preferred~

 

[XR8tt]

If there's room ?? Adding some extra capacity to lower steel section of sump does it also.. I'v drilled holes in original sump 10mm at top to 15mm at the bottom so it acts like a baffle, allows oil flow...
Then weld a box section over the std lower sump. An extra 1/2 ltr still helps oil temps..

 

[melvinmelvin]

Sorry for bumping and old thread. But have a question re oil cooler/temperatures,
so rather than making a new thread ..........

1UZFE:

Have a relatively big Monster radiator with two powerful Bosch thermostat controlled fans.
Use the red fluid in black plastic Toyota pre mix coolant.
Between 10 and 11 liters of coolant in the system.
Fans start at about 92/93 degree celsius.
The coolant temp is steady between 90 and 94 degrees celsius.
Happy with that.

Have fitted a relatively large Monster oil cooler.
The place it is fitted is not great. Its right behind the engine
so it doesn't get much of a natural air flow.
To compensate for low natural flow I have 5*25Watt fans mounted on the
back of the cooler, (fans running all the time).
About 5.5 liters of Toyota fully synthetic 5/40 in the system.

When running at about 2000-2300 rpm the oil temp is below 100 celsius (just).
Increasing rpm to 2500 and a bit above the oil temp goes to 105 and maybe
a bit above. Don't like that.

Now, what would you say that the oil temp should be?
Am I completely on the wrong track when I expect the oil temp to be close to the coolant temp?