what changes needed to fit a diesel engine in a petrol mav

greeley

just wondering as when/if my 2.4 engine ever dies on me id like to replace with a 2.7 diesel,what would be needed to do this,maybe easier just to buy a new maverick diesel but id like to know.thanks Wink

ivorbiggin · Posted: Wed Jul 04, 2012 7:34 pm Post subject:

Easier to buy another Maverano.

Off of the top of my head,
Fuel tank has to be changed, fuel lines need replacing or rerouting, diesel fuel filter will have to be installed, engine bay needs to be wired for a diesel, Diesel ecu will have to be used so maybe a possible change of wiring loom behind the dash.
Early Maverano's had a throttle cable, they were fly by wire after 1997, is the petrol cable or fly by wire?, if its cable then no problem rigging a cable up to an early engine or swap the pump and injectors over for the early type if your fitting the later engine.
Questions which i dont know the answer to but would need to find out are,
Will the petrol gearbox mate with the diesel engine and if so how far out would the ratio,s be. If i can only fit the diesel gearbox is there any difference in the length of the propshafts? and what differences if any, are there in the diff' ratio,s of petrol and diesel engined vehicles

GVstu · Posted: Thu Jul 05, 2012 7:00 am Post subject:

Not a straight forward swap then ivor Laughing

4trakmatt · Posted: Thu Jul 05, 2012 8:22 am Post subject:

i changed a petrol fourtrak to a diesel. it was a fourtrak diesel that went in.

i had a doner car and it was a night mare every thing had to be changed inc engine mounts gearbox loom.

i was expecting very little difference as the same model had that engine, boy i was wrong

greeley · Posted: Thu Jul 05, 2012 5:14 pm Post subject:

ok well thas answered my question well enough,i wont be doing that haha,il just buy a diesel when it goes,can really see the engine going anytime soon as its very healthy but i have a fetish for going through water and cant really do it in a petrol can i.too much to ruin

ivorbiggin · Posted: Thu Jul 05, 2012 7:45 pm Post subject:

greeley · Posted: Thu Jul 05, 2012 8:50 pm Post subject:

what can i do to protect this though,i cant really think of reliable way to do it

ivorbiggin · Posted: Thu Jul 05, 2012 9:23 pm Post subject:

dxmedia · Mud Obsessed Joined: 10 Dec 2008 Odometer: 2185

Can you still buy cans of damp start? That stuff is ace for waterproofing.

4trakmatt · Posted: Thu Jul 05, 2012 9:34 pm Post subject:

a tube of silicone and ur away!!!!!

in all fairness a petrol will do better if water gets in the engine. you dont have so much of a problem with hydrolocking.
a diesel is easier to bend conrods etc with water than a petrol due to a lot higher compression.

just run a snorkle and stop worrying.

greeley · Posted: Fri Jul 06, 2012 9:52 am Post subject:

ok ok sounds goodi thought it would have needed a bit more thought than that but they are simple things to do,suppose even if the dizzy did get wet through,it would dry out eventually with some help from wd40,cheers

4trakmatt · Posted: Fri Jul 06, 2012 12:36 pm Post subject:

all i do is silicone the lip of the dizzy cap and put it bask on, silicone any breather holes up that may be in the cap. pull off the leads and silicone the runners and push them back on. silicone the coil if its exposed.

i could go flat out down a river with out a single splutter and that was in a 2.2 petrol fourtrak. i drowned it up to the bottom of the windscreeen whole engine submerged and she didnt miss a beat.

ABCAB · Posted: Sat Jul 07, 2012 10:05 am Post subject:

Build is not that wild, check out this guys build thread http://www.expeditionportal.com/forum/threads/73196-Roninjiro-s-xterra-build

Standard 2.7TD has no ECU, the ETI versions have and that is where things could interesting. You just have to find a way to make your rev counter and speedo talk to your present setup.

Diesel filter install, and should be able to run with your standard tank and pipes, just remove the fuel pump as the diesel motor has it's own lift pump.

Wading is way more "reliable" with a diesel motor. Depending on how deep you go, the results are the same between petrol and diesel, you have a cold, wet and stinky interior and radio and other electronics that have to dry out....

This time I hydro locked solid and bent con rods. Was left with 10-12bar pressure per cylinder, but was still able to drive home over 200Km away.[/img]

ivorbiggin · Posted: Sun Jul 08, 2012 9:31 pm Post subject:

ABCAB · Posted: Tue Aug 07, 2012 10:13 am Post subject:

Did these models also have the "butterfly" valve in the intake pipe to stop air flow in the pipe at shut down. I see my two import motors I got had these valves. I pulled them out as I had no control signal to control them with, but I see the Terrano II we got here had them.

It was used to stop air flow that made the shut down smoother. I was interested in using it as an additional shutdown device in the event of engine run away on a turbo oil seal failure or even worse if the engine runs away on it's sump breather oil.

Best way to stop that is by blocking the air intake.

Xpajun · Posted: Tue Aug 07, 2012 11:49 am Post subject:

ivorbiggin · Posted: Tue Aug 07, 2012 7:29 pm Post subject:

Yes the pre intercooler manual pump models have an air controll butterfly.
Intercooler electronic pump models dont, as they have an ecu controlled fuel shut of solenoid in the pump that shuts the fuel off on the overun, its a different solenoid from the stop solenoid.
Pre intercooler models also have EGR valves ive not come across an intercooler model with an EGR valve as of yet.

Never seen an engine runaway due to turbo oil seal failure, The oil gets sucked past the failed oil seal into the air intake, as opposed to overpressure in the crankcase where the oil is pressured out into the intake.
I replaced the turbo on a 1.4HDI Citroen C3 last week, the seals had completely failed and it was billowing out blue smoke, and ran like a pig but didnt runaway, ditto with a Renault master 2.5 DCI. a few months back

Tractor Stig · Posted: Tue Aug 07, 2012 8:12 pm Post subject:

god, engines are so pointlessly complicated now.

ivorbiggin · Posted: Tue Aug 07, 2012 9:40 pm Post subject: