G'day.
My suggestions are,
1. Performance All Aluminium Radiator.
www.performanceradiators.com
2. Run Cool Hood Louvers
RunCool Hood Louvers - Hood Vents For Your Vehicle - Cool Your Engine
3. More insulation around dog box cabin engine cover, for noise & heat.
4. Exhaust manifold heat wrap bandage.
5. EGR delete, not legal, but very helpful. The egr can be blocked.
You investigate videos online. Mum's the word.
The biggest problem we all have is heat & air flow through the small engine
bay. The all aluminium radiator will disapate heat better, but add silicon hoses.
The hood vents will lower the engine temperature by 10f. Another option is to put
Insulation around the exhaust manifold, to keep cabin cooler and force heat out the exhaust.
There is a lot of heat around the exhaust manifold & turbo area
These improvements will help engine life.
Good Luck. Doug