Outer Limits 4x4 Board

I'm new 2 this as of now, just wondering if any1 has come across overheating 2h turbo in 75 troopy? done all the usuals like radiator, thermostat, viscous hub ect. Only happens when loaded up or 40 degree day if i go over 95k's. been doing it ever since i've owned it, not a head gasket, doesn't go thru a drop of coolant.

Anti boil may be rat shit. Change the coolant?

did that with rhe radiator then again with the thermostat. Some1 a while ago said to 'live with it' coz thats normal for aftermarket turbo'd 2h's???

troopa wrote:Some1 a while ago said to 'live with it' coz thats normal for aftermarket turbo'd 2h's???

I have heard this too. Might require a radiator upgrade.

Yeah better radiator, water pump up to scratch? Right engine oil?

x2 radiator upgrade.

What would he upgrade too guys? Custom, or bigger?

Contrary to popular belief, higher RPM (for the same load) will help an engine run cooler - higher fan speed, high water pump speed and more air through the engine. Mixture may be closer to stoich as well.

I assume kicking back a gear (if possible) may not be enough to help in your situation though.

hate 2 sound a bit 'been there done that' but, she has bigger natrad radiator in it. Has oil cooler, condensor and spotties infront of it tho thinkin maybe obstructing airflow?? just read a post from 2oo7 where a fella turbo'd his 2h and noticed a temp increase when held @ 2500rpm but hadn't yet sussed out the cause.

Maybe alter driving style? I shift at 2500rpm.

going back a gear definately helps it, on stinking hot days i onlyuse 4th

My driving style would suit miss daisey! ha ha. Its a 88 model done 370k i baby the old girl.

What's the oil cooler for? Is there any mud of rcrap between the rads?

cooler is 4 engine oil? seems a bit strange i think maybe the prev owner tried sorting it out 2. i run penrite 20w50 in it as she burns a bit btween changes.

How much boost? How much fuel is she getting?

troopa wrote:cooler is 4 engine oil? seems a bit strange i think maybe the prev owner tried sorting it out 2. i run penrite 20w50 in it as she burns a bit btween changes.

That does. Got a pic? Is it an auto?

my guess would be the mixture being wrong. get a pyro guage on there to measure exaust temps as well, and get it tuned by a propper diesel mob.

dunno bout boost or fuel, thinking its all stock. Maybe a good tune is all it needs, took it to a diesel injection place and they said they can't do stuff all with the pump while its in the car??? trash maybe??

troopa wrote:dunno bout boost or fuel, thinking its all stock. Maybe a good tune is all it needs, took it to a diesel injection place and they said they can't do stuff all with the pump while its in the car??? trash maybe??

can't be stock... 2h never came with a turbo from factory

troopa wrote:dunno bout boost or fuel, thinking its all stock. Maybe a good tune is all it needs, took it to a diesel injection place and they said they can't do stuff all with the pump while its in the car??? trash maybe??

They can adjust the pump timing and fuel screw while its in the car, not sure what they are on about there? Have you confirmed its actually running hot with an accurate aftermarket temperature gauge?

dogbreath_48 wrote:Contrary to popular belief, higher RPM (for the same load) will help an engine run cooler - higher fan speed, high water pump speed and more air through the engine. Mixture may be closer to stoich as well.

I assume kicking back a gear (if possible) may not be enough to help in your situation though.

the fan does absoluteley nothing when the car is going more than 20km/hr, infact, it inhibit's air flow.

radiator fans are pureley so your car doesnt overheat when your stopped or going slow.

The 2H simply does not like running above 2500rpm for any length of time.

It sounds like you have tried all the usual culprits.

The reality is, it just sounds like your fuelling is slightly on the rich side.

Rich in diesel = heat. When you turbo a 2H, you have to adjust the pump to run more fuel in order to get more power from the extra air. I would think you are running fractionally too much.

What does your exhaust emissions look like? Black smoke?

Overfuelling can cause oil consumption issues also. Motor runs hotter, oil is more viscous and gets burnt easier. Your oil will also get contaminated faster and thin out becouse of diesel contamination.

Overheating on a hot day is related to 2 things. Naturally at 40 degrees, your cooling system isn't running as efficiently and also hot air being drawn into your engine has lower oxygen density, which has the same effect as overfueling.

There is an external adjustmetn on the fuel pump to lower your fuel input. You shoudl be able to get any decent diesel specialist to adjust it for you.

That sounds like the culprit, its been hooning thru the oil for the last 20,000k or so, and i've even began changing it at 4,000k intervals on the last couple of services. It chars the black stuff out the back. Thanks for that info, sounds spot on, now i'll have 2 find me a 'decent' injection service, as the muppets i've seen previously were no help.

Shadow wrote:

dogbreath_48 wrote:Contrary to popular belief, higher RPM (for the same load) will help an engine run cooler - higher fan speed, high water pump speed and more air through the engine. Mixture may be closer to stoich as well.

I assume kicking back a gear (if possible) may not be enough to help in your situation though.

the fan does absoluteley nothing when the car is going more than 20km/hr, infact, it inhibit's air flow.

radiator fans are pureley so your car doesnt overheat when your stopped or going slow.

The 2H simply does not like running above 2500rpm for any length of time.

Shadow, i once thought the same thing until i bought my 80 series.

My turbo diesel 80 kept overheating with the jet-ski on going up hills on the highway doing 100km/h +, would go right up under the red and take for ever to come back down, i would always come back to forth, and ease off the throttle and still get hot. Even un-loaded in the sand would get very hot. I changed the Fan Clutch and the temp guage never moved again. i can drive it as hard as i like and it wont go over 90 deg

How hard does your fan suck at idle? can you hear the fan clutch (viscous) kick in and out when revving the motor at around a constant 1500-2000 rpm while stationary? 370,000 if you havnt replaced the fan clutch or re-oiled it thats always worth a shot.

But deffinately get it professionally tuned reguardless if you fix the overheating issue before hand.

Troy