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Td5... how to make one run?


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Guest diesel_jim

Sooo.... with say, a 3.9 EFI V8, you get the engine and a whole length of loom (with the ECU & relays) that usually lives under the RH seat.

stick 12v,earth,fuel pump on it and away it goes.

how easy is a Td5? (to be fitted in a defender)

I'll need the fuel cooler/filter/pump and pipes.

can the engine loom be easily "removed" from the rest of the vehicle (like the V8) or it is all wired in and part of the whole car?

to the folk out there that have retro fitted Td5's onto older vehicles... how did you sort the ECU wiring?

cheers!

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Sooo.... with say, a 3.9 EFI V8, you get the engine and a whole length of loom (with the ECU & relays) that usually lives under the RH seat.

stick 12v,earth,fuel pump on it and away it goes.

how easy is a Td5? (to be fitted in a defender)

I'll need the fuel cooler/filter/pump and pipes.

can the engine loom be easily "removed" from the rest of the vehicle (like the V8) or it is all wired in and part of the whole car?

to the folk out there that have retro fitted Td5's onto older vehicles... how did you sort the ECU wiring?

cheers!

Easy....

Loom wise:

If going into a Defender I'd just run the standrad harness - the loom seperates in 5 pieces as per earlier looms - engine, chassis, wings, dashbord.

Apart from the clocks (only thing different) you can just fit a complete Dashboard loom into an older Defender without too much fuss (depending on age). Could even upgrade to the later type dash board at the same time.

Engine harness... just swap it into the new vehicle with the engine.

ECU wise... can either be mounted under the drivers seat (if a 110 - or under the passenger seat if a 90) as per a Td5, or the loom is long enough that the ECU can be mounted on the bulkhead between the driver and passenger seats.

Alarm ECU wise - either run the standard 10AS unit, or there are a couple of ways you can get rid of it ;)

Only other thing you 'need' to change is the throttle pedal. You could if you wanted fit the later type clutch and brake pedals too... ECU looks for them, but will happily drive without.

Fuel system -

Either run a standard set up.

Or you can modify a standard 90 side mounted fuel tank to run a Td5 Pump - if your modifying a 110" I'd just fit a standard td5 tank.

A lot of people do away with the standard fuel filter setup when doing conversions - but I wouldn't!!

EUI injectors are very fussy when it comes to clean diesel, and the standard Td5 filter does a double pass to ensure the fuel is filtered to very high level.

Ian

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Guest diesel_jim

Thats great info Ian, cheers for that!

just a couple of questions though....

If going into a Defender I'd just run the standrad harness - the loom seperates in 5 pieces as per earlier looms - engine, chassis, wings, dashbord.

Apart from the clocks (only thing different) you can just fit a complete Dashboard loom into an older Defender without too much fuss (depending on age). Could even upgrade to the later type dash board at the same time.

Engine harness... just swap it into the new vehicle with the engine.

Do you mean to swap the whole bulkhead loom over, or can the Td5 separate pieces (i'm assuming the engine and dash ones) be grafted onto the "old" (in my case, 300Tdi) loom?

i suppose the complete loom would make things a helluva lot easier.

Do you know of any source of a comlete bulkhead loom for a defender? i suspect that "new" from LR would cost an arm and several legs.

I'd go for the full alarm system i think, just for the ease and decent security it offers.

to convert a side tank, is it a case of cutting the top to make a Td5 pump fit in? as its going into a 110 i think i'd fit the standard rear tank and (using a fuel pump) the side tank can "fill" the rear tank.

thanks again!

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Thats great info Ian, cheers for that!

just a couple of questions though....

Do you mean to swap the whole bulkhead loom over, or can the Td5 separate pieces (i'm assuming the engine and dash ones) be grafted onto the "old" (in my case, 300Tdi) loom?

i suppose the complete loom would make things a helluva lot easier.

Do you know of any source of a comlete bulkhead loom for a defender? i suspect that "new" from LR would cost an arm and several legs.

I'd go for the full alarm system i think, just for the ease and decent security it offers.

to convert a side tank, is it a case of cutting the top to make a Td5 pump fit in? as its going into a 110 i think i'd fit the standard rear tank and (using a fuel pump) the side tank can "fill" the rear tank.

thanks again!

I'd swap the whole bulkhead loom over... by the time you've messed around trying to get stuff to work, you might as well just swap the loom (quicker!!)

If you get an early Td5 dash loom, things like the indicator controls, wiper motor, hazard switch etc etc will all just plug and play. The only thing you ideally need to run is the Td5 clock set - has a different water temp, fuel gauge, speedo etc etc ( which I think you've already fitted) - the main difference is the warning panel. Although if you wanted you could alter a Tdi one, and then fit an addtional MIL light, but I'd just go down the plug and play route.... and fit the Td5 bits.

I can get Defender looms... depends if you want an early or late dashboard type - and what extras you want i.e. heated screen, electric windows etc etc. If you just want a base model loom - they are quite easy to get hold of.. usually around the £100 mark (but depends on spec).

New from LR they are about £500 - £1500!!

Things like the 10AS unit just plug in then....

Yep, to convert a side tank you just need to weld on an adaptor ring (or some people do a clamp type setup) so you can fit the Td5 pump/sender complete... or I can sort you out a nice Aluminium tank all ready to go (as I'm sure Allisport could).

Ian

P.s. cheers for the little parcel!! ;)

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The engine loom picks up all the engine sensors, starter and alternator, gearbox switches and has 2 plugs that link to the bulkhead. The other end has an ecu plug, three relay plugs and a feed to the fuses, something like a total of 22 connections :o (I know my old oil soaked loom intimately <_< )

The ecu also picks up on brake and clutch pedal switches and obviously needs the TD5 thottle pedal. So as Porny says, looks like you would need to swap everything.

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  • 2 weeks later...
Guest diesel_jim

Thanks all, I've read that tech article Ralph... quiye enlightening!

I've now bought a complete Td5 bulkhead from Porny, so it should be easy.... just plug it all in!

(well, will be easy when i get an engine to plug in! :rolleyes: )

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