Outer Limits 4x4 Board

i recently purchased a hilux surf 91 with 35", 5 " lift, with a hilux 5L 3.0lmotor and alll the 2.4 equip bolted on it turbo everything , now my prob is that on the freeway in 5th if i put my foot down at say 110 for anylonger than a minute the temp goes up nearly to the red same when im on the beach if i put my foot into it i was thinking it could be a couple of things either 35" tyres maybe the 2.4 radiator is a bit to small for the bigger engine or maybe its tuned with a bit to much diesel up higher in the throttle any ideas b4 i take it to get a tune and so on , also when i get off the throttle it comes back down , normal suburban driving never had a prob thanks for any advice
luke

Just try lifting the foot a bit sounds like the egt could be getting to high maybe get a gauge to watch it just remeber they weren't desing to push 35's in sand

3.0 motor plus turbo on a 2.4 radiator.. there's the problem.
Fitting a bigger radiator and making sure the fan/shroud is working properly should fix it.

luker wrote:i recently purchased a hilux surf 91 with 35", 5 " lift, with a hilux 5L 3.0lmotor and alll the 2.4 equip bolted on it turbo everything ,

didn't reaise they could actually fit on as the 5L head is a bit different to the 2LT/3L. besides pushing a 3 litre through a very small 2.4 turbo is realy pushing sh*t uphill. the 3L gets away with it just. backpressure at 3000 rpm+ is got to be a killer

/quote]tell me about it not much more puff after 3000 rpm dont know what everybody else thinks but was gonna look into gettin the turbo bored and hi flowed ???, and as for the radiator dont know what to get to fit into the surf ! still a bit new to all this any advice is greatly taken into account thanks

Sounds like the fuel mix might not of been tuned properly. I reckon whoever fitted it just wound the mixture real rich and left it at that. Maybe try winding the mixture back half a turn and see. Or get a diesel shop to turn it properly. Very cheap to get that done. Your radiator should be fine because 2L 3L and 5L's were the same only difference is the internal bits as in bigger bore and stroke.
What cond is your air filter in? Do you have a factory thermostat? Genuine ones open up more and are actually cheaper than aftermarket ones. Do you have a blocked radiator or missing a fan shroud. Lots of things to consider before blaming your turbo or doing any major mods to it. If you run a bigger higher flowing turbo you'll get even more heat.

thanks everyone for your advice first thing i have done is got a service etc and booked it in for for a dyno tune and see what happens from there!

Check simple things first. Radiator blocked? Fan clutch not operating correctly?
Sounds like your cooling system is the problem, not a tune issue. If the engine was creating enough heat from combustion to make it over heat with a perfectly good cooling system then your pistons would be molten blobs by now!

luker wrote:tell me about it not much more puff after 3000 rpm dont know what everybody else thinks but was gonna look into gettin the turbo bored and hi flowed ???, and as for the radiator dont know what to get to fit into the surf ! still a bit new to all this any advice is greatly taken into account thanks

throw the turbo out and get something of a decent size. a CT21 off the 1KZ would be ok or anything of a 2.8 turbo diesel. also check the manifold size.

well got a tune today and finally got the problem fixed firstly egt was through the roof finally got the tune with proper equip on dyno now sweet as no high temps at all also got the fan viscus silicone stuff done whatever it is and runs at a safe temp now lost a tiny bit of power but is safe now.

For the benefit of others,

You need to do one thing at a time to work out what the issue is.

First thing I would do is re-oil your fan clutch - if it has done 150,000K or more, this is probably the issue... Good news is that Toyota fan clutches are one of the only ones that you can renew the oil on and the oil comes from the Toyota dealer.

I have done a writeup on how to do this by clickingthis link:

How to top up your FAN CLUTCH OIL

If the issue is still there, then next thing to do is have the radiator POWER Flushed by a professional - not just flushed with a hose.

On Deisels - also look at tuning it based on EGT temps as you did.

You also need to know that OEM Temp gauges have a dead spot by design. By the time that needle starts moving they are already close to boiling point.

I installed a Digital Temp Gauge with an alarm for this reason - as the temps it gives are accurate and don't hide a potential problem - this way, I get pre warning before it's too late - and the alarm lets me know regardless of who is driving and not neccesarily looking at the temp gauge.

You can get more info on the issue and the solution here:

TM-2 Digital Temp Gauge with Audible Alarm

There's my two cents

Frank