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Discussion Starter · #1 · (Edited)
Hi All,
I'm a newby here so please correct me if needed. I have a valve problem in my gq 2.8 and am umming and ahhhing about doing the headwork or just replacing the motor. I don't know what it is but it is running one cylinder down. Either lifter or cam not sure. I am told compression is good but man did not test each and every cylinder so I am not even sure which one is the problem. I am thinking which motor. Does the gu 2.8 intercooled bolt straight in and do all the gearbox bolt holes line up etc. Do they require different looms of electrical system parts etc. I can't afford to pay to much so I was looking at 4.2 but this would require engineering mounting plates or is there a conversion kit these days. All information would be appreciated and anybody looking to sell something that would help don't feel like I won't buy let me know. Thanks guys

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Ilove4x4's

P.S. I'm in qld Gold Coast actually.
 

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Rust is just natural weight reduction.
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You mention you can't afford a whole lot... So I'm guessing that puts an LS3 off the cards.

From memory there was a small amount of modification needed to drop a GU 2.8 into a GQ... but as Simmo says, an RB is a good option. Parts are plentiful, they're cheap and they're tough.
 

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Gu 2.8s have an electronic fuel pump and gqs have mechanical, either swap the pumps over or run the ecu for the gu.


Rick
 

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Discussion Starter · #6 ·
What motor

Hello All,
Thanks for your replies. I should add I only want to put in a diesel and I am wary about putting anything too old in it so that it passes emissions control etc . Talking legal mods. Also I am a diesel man so only diesel is considered here as well. What I really want to know is does the 2.8 gq patrol have modified engine mounts so that a 4.2 can bolt straight in. And I hear the 2.8 gu mods are slight can anyone list them. And what is an ls3 and what would that cost.
Thanks.
 

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Discussion Starter · #7 ·
Ok,
After doing some research I am only interested in diesel motors. While I don't have a lot a money I do okay from time to time and sometimes have bulk cash to buy things if needed. An ls3 is not realistic price wise and rb30 I guess I just wanna go diesel. Have you heard about gas injection for increased power and how would it go on the 2.8td diesel. I'm also weighing in here on fuel economy vs power. Basically I want a diesel for river crossings, with maximum power, for best fuel economy within a budget. Reliablitly is also important. I suppose that's what everyone wants. But I have more than a few hundred $ to play with here. Would a 2.8td turbo gas injected. give you close to the same power of a 4.2 td but at a better fuel economy.
this is my dilemma.
Thanks for your feedback.
 

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vq35de rwd 1000-1800 usd, haltech plug and play ecu 1800 usd, and 150 kgs less, 280 hp and very good torque similar to tb42.

Plate adapter 1000 and custom mounts 300?
I could be done and there are a world of parts for them.
 

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vq35de rwd 1000-1800 usd, haltech plug and play ecu 1800 usd, and 150 kgs less, 280 hp and very good torque similar to tb42.

Plate adapter 1000 and custom mounts 300?
I could be done and there are a world of parts for them.
Not really an easy low cost option for the OP.
 

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I'd take the simplest approach. Take the car to a workshop that can do a proper leak-down test and give you a proper analysis of the likely problem. If the outcome of that shows a valve problem, it would probably be best to have them remove the head and have it overhauled by a cylinder head specialist, then refitted. For relatively little money (compared to an engine swap) your car will be back on the road fairly quickly, with warranty on the work done.
 
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Discussion Starter · #14 ·
Appreciate your input Chris but the whole purpose of doing selfie repairs is to learn about these things so that if one day I break down in the bush I gotta a better chance getting out of there. Also it may not be the cheapest in the short term but long term you can save a bucket doing it yourself.
 

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Yep - understood. I've been doing the same thing for 40 years. I misunderstood your original post, and assumed that a person who doesn't do their own compression testing wouldn't be up to doing their own cylinder head repairs or overhaul. Go for it! :)
 
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