GU 4.2L engine stuffed looking for good rebuilder in nth QLD

How old is it? Even if it's a tad over 3yo and i know the km's put it out of warranty but I'd be having a chat to Nissan HO and see what they can do for you.

Leroy

If its dropped its bundle at 135 k I'd say it was overfueling therefore running too hot EGT's. The only one I know is Motsons. This would be a good start as I would be getting the pump recalibrated and Dynoed after the rebuild to ensure the fuel system is spot on so you don't do another engine in the foreseeable future.

Simon,
Cant help you with info but im amazed at reading your story.
Hope whoever does the work spends time investigating the cause. I cant see the cause being an Engine failure, Personally I'd be looking closely at the turbo and how it was fitted. Do you know what boost it was set at? Also what brand oil were you putting in the sump?

Really sorry you have to go through this mate.
Ange

G'day Simon,

My old man lives at the gemfields,just had his 4.2 turbo rebuilt by the bloke who rents our house up there, and works as a diesel fitter in emerald, Dad saved himself about 4grand by getting him to do it as a weekend job.
I can get hold of him if your interested and put him in contact with you, I realise the distance between you, but you may be able to work something out between you if he is interested in doing it.

Avagoodn
Pezza

Hi Simon,

Would've thought Nth Qld started up around Mackay, not Gladstone, but anyway...

Sorry, I can't recommend any repairers in that neck of the woods except to say, Steve, the service manager at the Gladstone Nissan dealer is a good bloke who should give you reliable advice.

You may not have actually 'dropped' a piston. It is is possbile you've holed one throught excess fuelling and temperature in one cylinder. This would be a much simpler repair than a full rebuild. I'd recommend getting the head lifted to exposed the damage, then make a desicion on repair/re-conditioning/exchange, etc.

simon,
maybe even just dropped a push rod out from under a tappet, gives a shocking sound through manifold when this happens...........Hopefully!

Browny

Was talking to the owner of a 75 series who had turboed the 1hz motor.
Coming up the hill from Grafton to Glen Innes he expierienced identical problem to yours. Holed piston from over fuelling. No other damage, replaced one piston then had pump correctly calibrated.
Your repair bill may not be too exreme.
Methinks this was the gremlin stalking owners of early 3.0l. Nissans.
kesh

G'day Simon,

I have a '97 GQ Patrol with 110,000km on it. It has had the Safari turbo and intercooler on from about 30,000km. Compression is now down in 2 cylinders with a leakage of about 65% in both of them. Cannot tear it down yet as the vehicle is essential for work. Various opinions suggest broken top rings because from about mid '95 to '97 the GQ TD42 had lighter pistons.(This makes me wonder whether your GU being naturally aspirated from factory will be the same motor as mine). I am seriously considering a low km Jap import TD42T motor as they had the strong internals, and even though it may be cheaper to rebuild mine, the problem may occur again.

(Just as an aside, my egt's were spot on)

Hope this helps mate,
Muzza