Converting a 3.0 Turbo diesel Patrol to a 4.2 Turbo Diesel

I guess puting a V8 diesel might be a better option..

Thought about it when mine went bang but tha advise I got was that there was a bit that was incompatable and in the end it was easier, and cheaper, to stick another grenade in! I toyed with the V8 diesel but needed to change gearbox to do this and so the cost went to about $20,000 + !
Not sure about the gearbox. Some say they are the same and some say they are not. Both the 4-2 and 3-0 of that era had the same 5th gear problems so they must be very similar.
There is a contributor doing the Toyota 4.2T to a GU and it would be great but a lot of work. Whatever you do to a busted Patrol is "overcapitalising" as they are worth nothing however they are worth less if they don't work at all.
It may be easier to search wreckers and get a rolled 3-0 engine or an entire rolled 4.2 and much around as much as you want.

Good luck and lets us know what happens.

I did read that the small engine models have a different, lighter transmission than the 4.2's so they probably wont mate up easily.

Craig

Just get a 4.2 TD Patrol

I have just picked one up, and am in the process of "toying it up",,

next thing is to get "the beast", on a DYNO, and have the turbo kick in a bit lower..

I have faith that I can achieve economy, and power, but I will have to do it soon, as I am spending too much on fuel, and I do drive it properly, and not with a heavy foot..
Cheers
Bucky

I just sent a Member Message to a forumite who has done a swap from a 2.8 to a 4.2 so hopefully he will be along to offer any advice soon. I know it is not exactly the same as what you are doing but he may offer good hints none the less.

5 and 6lt petrol motors are being dropped into these engine bays for a lot less than a v8 chev diesel if that interests you any?? still give you plenty of poke.

Cheers, Trevor.

Hi Craig,

The most ecconomical way to get your patrol on the road is to rebuild the engine with a rebuild kit. If you are handy with a spanner then all the better err cheaper. Then it should run for another couple of hundred thousand km's again.
Another option is to ring up Linquip or Bruswick who do V8 diesel conversions and see if they have a 3.0 sitting around from a conversion. Don't get sucked in to wasting 20k on a V8 conversion ;)
If after all this you still want a 4.2 then sell it.
If you go for the 4.2 swap then gearboxes are the same apart from the bellhousings. The diffs are the same apart from the ratios. 3.9 in a 4.2 and 4.6 in a 3.0. Great if you put 35" tyres on!! Engine mounts are in different positions and need to be modified. Throttle is different also. I would think that's the main bit's but I'd be doing more research.
Good luck.

Leroy

FYI, There's a brand new TD42 on ebay as we speak...

TD42tdi

Hi Craig,

AFAIK the 4.2 and 3.0 had the same gearbox so the 4.2 should bolt straight up. I have done a conversion from a 2.8 to 4.2T and it is not as straight forward as some think.

Firstly I would bet the engine mounts will need to be cut off and moved as I had to do to mine. Also the 4.2 uses a throttle cable (mechanical diesel) and the 3.0 is a drive by wire so you will need to source a pedal and cable assembly.

I found a lot of things still use the ECU as well such as the aircon unit so you may have to keep the ECU or figure out how to bypass it (I bypassed mine). When you get the engine make sure you get the factory engine harness as well as it will save 10 million hours of hassle. It is not all that bad splicing in the 4.2 harness to an electronic diesel harness as the 4.2 has only a third of the sensors and monitoring controls as a 3.0. All your temps, pressures, switches etc are straight forward as are glow plugs, tacho etc. Get yourself a good book with both engines in it or befriend a Nissan service manager like I did.

I would stick to the non-intercooled 4.2T as opposed to the intercooled one as the fuel pump in the IC one has some smarts (electronics) to it so may need an ECU or something.

There are also a lot of small things such as exhaust work, aircon piping, fan shroud and diffs (as mentioned however you could just put on bigger tyres and it would cancel out).

Mine cost $10,000 drive in / drive out but I did some electrics myself. I had a guy in Brissy do mine but he had a doner cab chassis that was written off so migrated stuff from it to mine.

I have to say that it was the best thing I could have done to my Patrol. The 4.2 is easy to tune, mod, enhance etc and is so god damn reliable as well. You won't look back if you do it.

Regards
David