Thread: ZD30 engines

I was the owner of a TD5 discovery but have now got a Patrol with a ZD30 engine, I realy like it, has heaps of guts tows better than the discovery did, but it does come at a cost a couple of weeks ago while towing a coupe of ton it lost a cylinder, I switched it of and rolled to a stop and had it towed home, When I pulled it down all 4 pistons had cracks and no1 had blown a hole behind the top ring, the bore was perfect even after 247000klm, It was a cheep fix but alot of labour for me, pistons, rings head gasket, and head bolts came to $715 plus oil and filter totaled under $1000 and its back on the road, If asked what I would rather have I guess the patrol cause it has more room for the kids and purchase price is about the same for a second hand one. Its a shame about the problems patrols have because it leaves you stuck beside the road, atleast with the landrover you only need to put up with 3 dash lights and an auto in limp mode plus a rear dragging on the ground waiting for another $800 air bag compressor, I guess when the diesel rangerovers get a bit cheeper thats what I will get Cheers

No.3 son (BroomeDefender) & daughter in law have moved to Fitzroy Crossing with work. He's about to buy a NEW Nissan Patrol diesel, mainly for her to drive. Will the Nissan give them grief ????

Pete

Originally Posted by Pierre

No.3 son (BroomeDefender) & daughter in law have moved to Fitzroy Crossing with work. He's about to buy a NEW Nissan Patrol diesel, mainly for her to drive. Will the Nissan give them grief ????

Pete

Gee I dont know, Every time I drive mine I just love it, Ive had 5 landcruisers then the discovery, but the patrol goes like a rocket maybe thats why it had a melt down, Im going to put boost and egt guages in so I can keep an eye on things, I think if I got a new one I would put these guages in and make sure boost stays under 15 and ex temp stays under 450 and all should be fine, I would get another one

Originally Posted by Beau351

Im going to put boost and egt guages in so I can keep an eye on things, I think if I got a new one I would put these guages in and make sure boost stays under 15 and ex temp stays under 450 and all should be fine, I would get another one

While installing the gauges is a great idea, you need to have them installed in the right place (i.e. EGT probe in the manifold, not down pipe) and have some realistic figures to base them off.

Boost doesn't need to be limited, in fact trying to keep boost down will lead directly to high EGT's.
EGT should be safe for spikes up to 750 but sustained (i.e. towing into a headwind or a long hill) 600-650 is better. I don't know what the ZD30 does stock but I imagine 450 would be exceeded on a flat road cruise.

I have travelled around Oz twice now.Both times the number of Nissans that were on the side of the road were unbelievable...all with the same problems..blown motors.Shame really the rest of their drive train is as it has always been..tough as old boots. Never saw any 6's though but that motor is no longer available.
John.

Originally Posted by Pierre

No.3 son (BroomeDefender) & daughter in law have moved to Fitzroy Crossing with work. He's about to buy a NEW Nissan Patrol diesel, mainly for her to drive. Will the Nissan give them grief ????

Pete

The new common rail version hasn't had any major problems

Originally Posted by Dougal

While installing the gauges is a great idea, you need to have them installed in the right place (i.e. EGT probe in the manifold, not down pipe) and have some realistic figures to base them off.

Boost doesn't need to be limited, in fact trying to keep boost down will lead directly to high EGT's.
EGT should be safe for spikes up to 750 but sustained (i.e. towing into a headwind or a long hill) 600-650 is better. I don't know what the ZD30 does stock but I imagine 450 would be exceeded on a flat road cruise.

Why?, its just comparative, for that purpose^^^, just see what it does when its healthy and the airflow meter is good and when it cracks a darky, you'll note the extra fuel (pyro temp) and boost that lead to the well known death of the ZD30

Originally Posted by Dougal

While installing the gauges is a great idea, you need to have them installed in the right place (i.e. EGT probe in the manifold, not down pipe) and have some realistic figures to base them off.

Boost doesn't need to be limited, in fact trying to keep boost down will lead directly to high EGT's.
EGT should be safe for spikes up to 750 but sustained (i.e. towing into a headwind or a long hill) 600-650 is better. I don't know what the ZD30 does stock but I imagine 450 would be exceeded on a flat road cruise.

I have seen 750 on a leisurely gentle uphill drive, auto GU with no load. 450 is really easy on the flat, without a headwind

Thats why they go so hard, fuel mapping is pretty aggressive.

JC