Nissan navara ute d40 Auto 5 mouths rego and licensed

I have a Nissan navara ute d40 Auto 5 mouths rego and licensed 2007 and 280ks and my partner has put 4 grand into the car and has got brand new turbo and brand new exhaust system and brand new manifold and second hand transmission and it runs but when it gets hot it stops so you will need a towed but my partner knows it is not the electricals or More

$4,500