The Nissan Patrol ZD30 turbocharged 3.0L vehicle has had a few incarnations since introduction around the late 1990’s.
Various forums are dedicated to Nissan Patrol owners and have a lot of good information, so below are just a few points we have picked up on from experience of Nissan Patrol ZD30 GU Garrett turbocharger problems and solutions.
A common complaint and a reason why the original Garrett turbocharger requires replacement is overboosting. The turbo tends to over boost and at times have an erratic boost curve as it spools up. It is not uncommon to see the GT2052v Garrett turbo on the ZD30 Patrol spike in boost pressure to well over 20psi.
The practice of installing a larger / higher flow exhaust on a Nissan Patrol as many owners do can sometimes be a factor in reducing the problem.
It is best practice with the Nissan Patrol ZD30 GU regardless of set up, to install a Dawes and needle valve to help prevent the problems of boost spiking. It will also allow for better control over maximum sustained pressure (say around 15psi if you want more power and less fuel economy) or (say around 10psi for fuel economy). They also work through spool up, providing a smoother boost curve and a more responsive vehicle in most cases.
Additionally, a boost gauge and an EGT (exhaust gas temperature) gauge is highly recommended.The EGT gauge can alert you to excessively high temperatures that can damage the engine.
You might also consider an oil catch can to stop oil mist ingress from the crankcase.
Here at Demon Pro Parts, we have two types of turbos to suit Nissan Patrol ZD30:
(1) Ceramic Coated Turbo for Nissan Patrol ZD30