converting from petrol to diesel

Alternative power-plants and transplants (GTi, Porsche, Subaru, Audi, diesel etc). Discussion and Q&A last answered over 2 years ago.
You may also want to visit the Wiki(pedia) for a more structured index of T25 repair, maintenance, technical and ownership topics.

Moderators: Moderators, User administrators

mad morty
Posts: 21
Joined: 27 Feb 2011, 09:27

converting from petrol to diesel

Post by mad morty »

hi guys,
i have a petrol t25 2.0l cu Aircooled van,
but im converting to a water cooled diesel, i intended to drop a golf tdi in her.

basically what i really need to know is..... what parts do i need for the connversion??????!!!!

so far i know i need...

water pipe work
diesel gearbox

but what else do i need....?
is there anything else i need?

do i need the wire looming from a diesel van....

i just dont know, can anyone help me out please?
or anyone who has done this please please get in contact with me.

my personal email is:

cheers for looking

User avatar
Posts: 1984
Joined: 15 Aug 2007, 18:23
80-90 Mem No: 3825
Location: Debris

Re: converting from petrol to diesel

Post by dugcati »

ave a good look around the site as this has been asked a few times already - it's quite doable but you need to make sure you have all the bits!
It is by will alone that I set my 'van' in motion!

User avatar
Posts: 7930
Joined: 24 Nov 2009, 17:54
80-90 Mem No: 5262
Location: cheam surrey

Re: converting from petrol to diesel

Post by lloydy »

Easiest way is to buy a scrap diesel van and use it as a donor. There is lots of bits you will need. You don't need a diesel gearbox, just the bell housing . But if you are fitting a tdi you will have to fit longer gears to get the best out of it.
You got a lot of work ahead, especially going from air-cooled
Time is a drug. Too much of it kills you

User avatar
Johny B
Posts: 1829
Joined: 07 Oct 2005, 20:26
80-90 Mem No: 2003
Location: With LMP in Malpas, Cheshire

Re: converting from petrol to diesel

Post by Johny B »

Or just sell the ac and buy a diesel :ok
Member 2003

VW Camperhaus

User avatar
Posts: 2234
Joined: 04 Jun 2009, 16:07
80-90 Mem No: 7278
Location: Surrey

Re: converting from petrol to diesel

Post by ninja.turtle007 »

Depends on ETDi or MTDi. Just a few bits to think about.

Bell Housing
TDI input shaft, clutch and flywheel
Diesel engine bars, mounts and rubbers
Jx sump or convert N/A sump
Jx exhaust manifold
Jx exhaust and down pipe
JX Air filter canister
Charge cooler and oil cooler (maybe)
Engine bay water hoses
Longer 3rd and 4th
JX Inlet manifold (MTDI
diesel loom (MTDI)
Diesel throttle cable (MTDI)

As Lloyd said you are better off with a doner vehicle. But If you want to buy a job lot of bits, I have a N/A diesel westy I can strip for a lot of what you need.
Full time Explorer