Help needed, TD42 running hot on highway..

[ashmccormick]

Never even thought of that! I'm using 15w40 Diesel oil though, thats reasonably light isn't it?

[Sir Roofy]

Never even thought of that! I'm using 15w40 Diesel oil though, thats reasonably light isn't it?

that's what I'm using,gear box transfer case diffs maybe sluggish in need of a change
ambient temps might 40+ but roads are twice that there for diffs ect will heat up if oil
is past it

[AB]

Has it always been like that and that's why you have done all that work or has it recently happened after the mentioned things above?

[ashmccormick]

that's what I'm using,gear box transfer case diffs maybe sluggish in need of a change
ambient temps might 40+ but roads are twice that there for diffs ect will heat up if oil
is past it

Yeh good point mate! Have to see what others are using out here. I run 80w90 for front diff, gearbox and transfer. And LSD oil in rear

[ashmccormick]

Has it always been like that and that's why you have done all that work or has it recently happened after the mentioned things above?

Its always run pretty hot mate, thats why I have turned the cooling system upside down trying to see whats going on... Got a 3 core radiator as I thought that might help too.
Always blown quite a lot of black smoke. Perhaps new injectors could be worth looking at...

[nissannewby]

Do you have all the rubber curtains, foam strips etc in place?

You could also try blocking the bypass port in the thermostat housing.

[ashmccormick]

Do you have all the rubber curtains, foam strips etc in place?

You could also try blocking the bypass port in the thermostat housing.

Is the bypass port the hose that joins onto the radiator filler neck from the thermostat housing? Is there a downside to blocking this off? I'm assuming I have everything in place, no leaks or coolant loss.

[BigRAWesty]

If it's blowing heaps of black smoke could it be to rich??
Being an NA we don't have much room at all to move on fuel pump adjustment..
They will blow a little when under load but if your seeing black smoke when cruzing then it's possible to rich and thus causing extra heat in the engine..

Apart from that.
If you trust your secondary temp gauge at 70c then I'd say all good and don't stress about the factory gauge

[ashmccormick]

If it's blowing heaps of black smoke could it be to rich??
Being an NA we don't have much room at all to move on fuel pump adjustment..
They will blow a little when under load but if your seeing black smoke when cruzing then it's possible to rich and thus causing extra heat in the engine..

Apart from that.
If you trust your secondary temp gauge at 70c then I'd say all good and don't stress about the factory gauge

Not sure about the factory gauge temperature reading as it seems too low IMO, I rewired it the other day as I thought the earth wire may have been dodgy but that didnt change much. It does move up when factory gauge moves and down when cooler etc so it works in that sense just not confident about which temp reading is accurate really.

In cooler weather its not a worry at all, just with the ambient temperature being so extreme I am just wondering what might be making it run so hot. Might have to locate a Diesel specialist on my travels who could have a look at the pump adjustment...

[BigRAWesty]

Factory temp gauges are a very rough guide. And many don't trust em..
One way to check your secondary gauge is to borrow or buy one of those Lazer temp gauges. When up to temp check your radiator hose near where your prope is..