Terrano to Maverick motor swap

[Jethro]

Like the title says, I want to do an engine swap. Both are TDIs, only obvious thing is that the Nissan is LWB but the Maverick is SWB.

Now, the Nissan does have a nats thing on the key, so do I need to swap the diesel pump and/or brain with the engine, or just change the motor and plug it all in?

Or should I buy another Fourtrak for handiness sake..........

 

[Timbo_1975]

If both vehicles have the same fuel system i.e. Bosch or Zexel, you *should* be ok.

 

[lacroupade]

If both vehicles have the same fuel system i.e. Bosch or Zexel, you *should* be ok.

But should he take the ECU as well?

Whats the reason for the swap, its just unusual to hear of a knackered engine in these trucks so would be useful feedback....

 

[Timbo_1975]

What year is the donor and what year is the patient?

 

[Jethro]

Donor, 1998 Terrano TDI, runs ok 134k miles but clutch fubared and its got a long mot failure sheet. If it was only one problem or another you'd try and fix it, but ............

Maverick is a swb TDI, its about 1997 or 98, and it seized after the owner got it frosted, still short mot & tax. The heat exchanger burst on it, and he replaced that but he only got a days driving before it broke permanently. Block possibly cracked internally? I don't have posession of it so haven't tried to see if it will run or not.

So, the Terrano has a bosch maf, and I can't see writing or anything on the pump. This car has NATS. The Maverick has a hitachi maf, and a different pump, there is a big black plug on the side of it and again I can't get a look at any identifying markings. No immobiliser according to owner.

At this point before shelling out more money, I am trying to determine differences between the 2 units.


1. I imagine that even if the pump was plumbed ok, it may not be compatible to the brain? Or does it not matter?

2. Can I expect any horror stories with different clutches, flywheels, gearbox spigot shafts or crank sensors?

3. Can one type of pump be swopped for the other, could I use all the maverick pump and wiring on the donor engine? In this case all the wiring would belong to the original car, only the block would be different.

4. If the pumps can't be swopped, can the ecu be swopped between cars?

Thanks for any help offered folks.

 

[Toolbox]

You will either have to change the wiring harness and ecu with the engine, (big job lots of potential problems)
Or change the injection pump, possibly the injectors as number 1 may be different, and the MAF will need to stay as a Hitachi, may be other things but not coming to mind at present. Speed sensor should be ok if you have the one in the top of the bell housing.

Have both the engines got EGR?

 

[Timbo_1975]

As toolbox says. You will have to change the Inj pump on the donor engine to match the ECU of the truck it is going into. Some had the crank sensor on the flywheel on the bellhousing, some had a cam position sensor on the timing case, again you will need to check this.

The donor engine will have to be altered to the EGR status of the new truck too.

Leave the ECU of the running truck as it is- i.e. you must alter the engine to suit.

 

[mobyone]

for nats, the pumps are both the same, it is just the nats unit is sat right on top of the stop solenoid.
if you pm me i will send you the details on how to bypass the nats, just dont wan't to post on a public forum... you can swap them over too, it is up to you.
richard

 

[Timbo_1975]

for nats, the pumps are both the same, it is just the nats unit is sat right on top of the stop solenoid.
if you pm me i will send you the details on how to bypass the nats, just dont wan't to post on a public forum... you can swap them over too, it is up to you.
richard

On the TDI, the nats unit is inside the car.

 

[mobyone]

thought it was td, not tdi. sorry...funny what you read and what your eyes see isn't it.
richard

 

[Jethro]

Could the egr be disabled, or would there be fault codes?

Is it feasible to swop timing covers, or would I not need to if the sensor remains on the Maverick's original bellhousing anyway ( if thats where it is)?

This is starting to sound like a whole load of bother, I thought this would be straightforward enough. I'm alright with spanners but have electrical blindness! It would be a lot simpler if I had enough of a budget for one that's on the road and ok........

 

[lacroupade]

Well I confess to not being clear what the EGR issue is either, as its a well documented improvement to block the pipe and take it out of service???:nenau

 

[Timbo_1975]

EGR - if the transplant has egr and the donor does not, you cannot just leave the wiring un-connected as the ecu will be expecting to see the egr controls, and they also monitor egr rate by looking for a drop in airflow through the MAF. You will get the mil lamp on , and possible limp mode.

Crank Sensor- flywheel v timing case. Given the inj pump / cam runs at 1/2 crank speed, the ecu needs different programming, you cant swap from one to the other and retain the same ecu.

Simples?

 

[Jethro]

Anybody want 2 4x4s for a grand..............?