T25 Alternative Engine Forum

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Most liked posts	Author	Posted	Liked	Forum
EJ20 Engine Overheating - Solutions?	Basilakios	23 May 2026, 11:54	2 times this week	T25 Alternative Engine Forum
Coolant issues	silverbullet	05 May 2026, 17:27	Once this week	T25 Alternative Engine Forum

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Last post

Replacing the jx

Last post by vwaddict « 17 Nov 2016, 16:50
Replies: 17
by vwaddict » 11 Nov 2016, 23:38
1

2
I'm 98% sure the engine is cooked in our latest bus (as the guy we brought it off suggested) so I'm thinking of changing it for something with a bit...
17 Replies

9395 Views

Last post by vwaddict
17 Nov 2016, 16:50
1Z Tdi install photo diary

Last post by ajsimmo « 17 Nov 2016, 08:02
Replies: 48
by futbus » 07 Apr 2012, 07:58
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2

3

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We are asked quite a bit what parts and how to install a Tdi into a van. We will assume that the donor van is a diesel and is water cooled. This is...
48 Replies

63735 Views

Last post by ajsimmo
17 Nov 2016, 08:02
Oil pressure light

Last post by muttleypup « 16 Nov 2016, 18:00
Replies: 17
by muttleypup » 29 Sep 2016, 20:09
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2
I have a 1987 single cab with a 1Y engine fitted. The oil pressure light doesn't come on when ignition is switched, is there any way to test it or do...
17 Replies

8004 Views

Last post by muttleypup
16 Nov 2016, 18:00
High tork starter moters

Last post by Smiffo « 16 Nov 2016, 12:48
Replies: 6
by alank950 » 16 Nov 2016, 09:30

Starter motor is goosed on my van and I was reading that there are high tork starter moters available for these ...anyone have any info on these of...

6 Replies

2771 Views

Last post by Smiffo
16 Nov 2016, 12:48
injector pump

Last post by boxer « 12 Nov 2016, 20:04
Replies: 9
by boxer » 01 Nov 2016, 16:50

Is this any good? for my JX?

Seems like a good price?

9 Replies

4412 Views

Last post by boxer
12 Nov 2016, 20:04
Talk to me about spark plugs for a non turbo EJ20 (my99 ish)

Last post by Domino « 11 Nov 2016, 16:54
Replies: 10
by Hoopy_Frood » 21 Oct 2016, 10:38

So many to choose from, I feel like a kid in a sweetshop.

What's the real difference between them all? Bosch, NGK, copper, iridium, platinum?? Does...

10 Replies

4004 Views

Last post by Domino
11 Nov 2016, 16:54
Fitting A 1.6 SB engine-which turbo to use ?

Last post by t25driver « 11 Nov 2016, 13:20
Replies: 3
by mig » 09 Jun 2014, 13:50

I am fitting an SB engine from a Passat into our T25 and it has the a Garret water cooled turbo fitted which I may use if I can find any info on the...

3 Replies

3670 Views

Last post by t25driver
11 Nov 2016, 13:20
Cylinder head agg or pb

Last post by T25_steveo « 09 Nov 2016, 16:10
Replies: 7
by T25_steveo » 08 Nov 2016, 18:36

Hi all was hoping someone could help. I'm about to undertake a gti conversion and on a whim on eBay a gti head came up with Kent cam and pulley. It's...

7 Replies

3686 Views

Last post by T25_steveo
09 Nov 2016, 16:10
Useful website for all the Jap manuals incl Subaru

Last post by Aidan « 04 Nov 2016, 13:26
Replies: 1
by boardmonkey » 04 Nov 2016, 08:47

Hi,

Found this, great for getting the official manuals from Subaru including the wiring diagrams, troubleshooting & workshop manuals as well....

1 Replies

1186 Views

Last post by Aidan
04 Nov 2016, 13:26
Water cooled turbo

Last post by t25driver « 02 Nov 2016, 21:10
Replies: 5
by dave friday » 08 Jul 2015, 08:36

Morning all,should I use the water cooled turbo in my sb engine swap? what are the pros/cons?
Ta.

5 Replies

3212 Views

Last post by t25driver
02 Nov 2016, 21:10
SUbaru EJ25 conversion - runs 4 seconds and dies

Last post by boardmonkey « 01 Nov 2016, 18:18
Replies: 33
by boardmonkey » 11 Oct 2016, 10:50
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2

3
Hi,

I've put in a Subaru SOHC EJ25 N/A conversion with RJES loom into my bus my van was a 1.9DG. Engine code is BE9, Donor vehicle was a Subaru...
33 Replies

13811 Views

Last post by boardmonkey
01 Nov 2016, 18:18
Agg gti vs aaz

Last post by T25_steveo « 31 Oct 2016, 23:44
Replies: 13
by T25_steveo » 29 Oct 2016, 22:57

Hi all I'm after a few opinions. I believe my 1.6 td Jx may be cooked although I haven't inspected it yet, she still starts runs etc but head gasket...

13 Replies

8453 Views

Last post by T25_steveo
31 Oct 2016, 23:44
Fitting a "SB"engine

Last post by t25driver « 31 Oct 2016, 18:41
Replies: 16
by dave friday » 13 Jun 2015, 09:36
1

2
Hi all,as above who's fitted one?any tips?
Ta.
16 Replies

10991 Views

Last post by t25driver
31 Oct 2016, 18:41
EJ exhaust option

Last post by slowcoach « 31 Oct 2016, 11:30
Replies: 18
by slowcoach » 01 Aug 2016, 10:02
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2
hi all-
has anyone fitted an early model WBX exhaust box onto their subaru? like this:

or this (more budget)

seems like itd only be simple...
18 Replies

11633 Views

Last post by slowcoach
31 Oct 2016, 11:30
EJ20 donor version - diagnostics and BUILD

Last post by slowcoach « 31 Oct 2016, 11:15
Replies: 20
by slowcoach » 08 Jun 2016, 09:50
1

2
HI all-
im about a month away from having a conversion to an ej20, and have a prospective donor lined up. Its a '99 forester with good documentation...
20 Replies

9677 Views

Last post by slowcoach
31 Oct 2016, 11:15
Cambelt Snapped advice needed (£800 ..??)

Last post by HarryMann « 21 Oct 2016, 19:43
Replies: 7
by pgra0909 » 18 Oct 2016, 01:49

Hi Guys... totally gutted here.. My belt snapped and apparently damaged the valves? I ended up calling a mobile mechanic who called round and fitted...

7 Replies

3106 Views

Last post by HarryMann
21 Oct 2016, 19:43
New Member with Scooby Plans

Last post by milky matt « 21 Oct 2016, 06:40
Replies: 8
by milky matt » 13 Oct 2016, 17:17

Hi all, just joined after being a guest user for a fair whilst. I've got a 1.9DG 4 speed van with plans to put in an EJ25 from a 1998 legacy . I've...

8 Replies

3530 Views

Last post by milky matt
21 Oct 2016, 06:40
Fitting aaz

Last post by behai « 17 Oct 2016, 19:08
Replies: 5
by behai » 16 Oct 2016, 19:00

Just fitting AAZ engine into t25.. does anyone know how I can take the AAZ turbo across instead of using the Jx turbo and manifold ???

5 Replies

2794 Views

Last post by behai
17 Oct 2016, 19:08
AAZ engine swap

Last post by vwaddict « 17 Oct 2016, 10:10

by vwaddict » 17 Oct 2016, 10:10

Hi, can anyone direct me to a good step by step aaz engine swap thread.... If there is any. Thanks

Sent from my E6853 using Tapatalk

0 Replies

1973 Views

Last post by vwaddict
17 Oct 2016, 10:10
aaz manifold removal advice needed

Last post by tattoojohnny « 16 Oct 2016, 09:49

by tattoojohnny » 16 Oct 2016, 09:49

Morning all.

I think my AAZ engine is blowing from the inlet manifold (I think its still got the JX manifold on). From what I can see using a mirror...

0 Replies

1719 Views

Last post by tattoojohnny
16 Oct 2016, 09:49
Engine tinware / Protection for EJ20

Last post by Dazco « 14 Oct 2016, 17:40
Replies: 2
by mshaw1980 » 13 Oct 2016, 12:43

Hello

Just wondered if anybody has managed to reuse or make the WBX tinware fit around the subaru engine?? I know it wont provide a great deal of...

2 Replies

1184 Views

Last post by Dazco
14 Oct 2016, 17:40
1.6td jx and jr codes, are they the same?

Last post by max and caddy « 13 Oct 2016, 17:10
Replies: 10
by quattrodave » 01 Oct 2016, 10:28

Steadily working through my jobs list and noticed the engine has a jr code. Is this the same as a jx?
Was it an original fitment (1990 mulivan) or...

10 Replies

6750 Views

Last post by max and caddy
13 Oct 2016, 17:10
Subaru EJ25 Wiring Loom support/info/data

Last post by irishkeet « 11 Oct 2016, 20:47
Replies: 6
by irishkeet » 11 Oct 2016, 15:03

Hello

I have decided to start this thread to understand the EJ25 wiring loom a bit better and hopefully it will be of help to some others in the...

6 Replies

3544 Views

Last post by irishkeet
11 Oct 2016, 20:47
TDI FLAT SPOT ??

Last post by KINGPRAWN « 11 Oct 2016, 07:05
Replies: 12
by KINGPRAWN » 18 Sep 2016, 11:30

Had my 1z TDI conversation done a few years ago and it's been absolutely trouble free ( the odd water hose fail but nothing more) ... I performs...

12 Replies

6238 Views

Last post by KINGPRAWN
11 Oct 2016, 07:05
Fitting AAZ engine - changing the sump and oil pick up pipe

Last post by clone123 « 05 Oct 2016, 17:31
Replies: 2
by behai » 03 Oct 2016, 20:33

Can anyone please help answer a few questions as regards changing to an AAZ engine which will soon be on the go. Just wanted to know if you have to...

2 Replies

2151 Views

Last post by clone123
05 Oct 2016, 17:31
AAZ Auxiliary pump

Last post by dave friday « 02 Oct 2016, 17:57
Replies: 3
by mrnickmuss » 02 Oct 2016, 12:45

I have just fitted a replacement AAZ and realised that it doesnt have a hole in the flange on the rear of the engine to take a sensor switch for the...

3 Replies

2502 Views

Last post by dave friday
02 Oct 2016, 17:57
Engine running hot

Last post by Jonnyb416 « 01 Oct 2016, 10:26
Replies: 4
by Jonnyb416 » 11 Sep 2016, 09:20

Quick question about my 1Y if anyone can help please (put it here for a quicker response)

Came to Busfest on Friday and felt the fan was on a lot....

4 Replies

2611 Views

Last post by Jonnyb416
01 Oct 2016, 10:26
AFN top tip

Last post by ninja.turtle007 « 30 Sep 2016, 12:48
Replies: 11
by syncroandy » 24 Aug 2016, 19:30

Do a Google images search for 'syncroandy afn'

8)

PS. ..and fit a clutch switch if you haven't already !

11 Replies

6715 Views

Last post by ninja.turtle007
30 Sep 2016, 12:48
Best oil for a subaru legacy 2002 2.5

Last post by Domino « 29 Sep 2016, 05:18
Replies: 6
by irishkeet » 27 Sep 2016, 20:34

Hello

I was wondering what oil your running in your scooby engines, I have a subaru legacy 2002 2.5

cheers
irishkeet :mrgreen:

6 Replies

2236 Views

Last post by Domino
29 Sep 2016, 05:18
Overheating AAZ tried my best but failed.....

Last post by mrnickmuss « 25 Sep 2016, 09:56
Replies: 12
by mrnickmuss » 02 Jul 2016, 16:09

My 1991 Doka which had a reliable AAZ fitted two years ago. I knew I had a slight leak around one of the flanges on the engine and I was keeping an...

12 Replies

5790 Views

Last post by mrnickmuss
25 Sep 2016, 09:56
AAZ fuel pump pulley woes.....

Last post by mrnickmuss « 25 Sep 2016, 09:52
Replies: 16
by mrnickmuss » 14 Sep 2016, 18:42
1

2
I need a bit of luck right now and I am hoping someone here can help.... (I wont be the first time and certainly wont be the last!!)
I have have...
16 Replies

6626 Views

Last post by mrnickmuss
25 Sep 2016, 09:52
boost pipe popped off

Last post by davegsm82 « 23 Sep 2016, 23:10
Replies: 1
by jas915 » 22 Sep 2016, 15:26

So i recently changed my exhaust and had to remove the turbo the get 2 snapped studs machined out.So went away this weekend van seemed fine going...

1 Replies

1915 Views

Last post by davegsm82
23 Sep 2016, 23:10
AAZ ECO (non LDA) Pump

Last post by aerovolito « 21 Sep 2016, 11:04
Replies: 2
by aerovolito » 20 Sep 2016, 10:19

On a whim, I ordered up a Brickwerks Boost Pin for my AAZ equipped Westy. I should have checked my pump compatibility first though because it looks...

2 Replies

2522 Views

Last post by aerovolito
21 Sep 2016, 11:04
Subaru conversionists, Outback autobox required

Last post by Aidan « 19 Sep 2016, 12:55
Replies: 3
by toomanytoys » 17 Sep 2016, 08:39

I know its I the wrong forum, but specific to anyone doing/done a Subaru conversion, so can this be left here for a few days to see please?

In need...

3 Replies

1926 Views

Last post by Aidan
19 Sep 2016, 12:55
Diesel InjectionPump Internals - what does "worn" look like?

Last post by mm289 « 16 Sep 2016, 19:52

by mm289 » 16 Sep 2016, 19:52

Hi,
after the problems in the summer with the AAZ fuel pump priming I am currently stripping it down to have a check. Can't see any obvious issues...

0 Replies

1875 Views

Last post by mm289
16 Sep 2016, 19:52
bleeding t25 diesel coolant system

Last post by BryntheBrick « 16 Sep 2016, 12:09
Replies: 3
by BryntheBrick » 15 Sep 2016, 09:43

Hi,

I have just had as replacement engine put in my 88 t25. It is a 1.9td AAZ replacing a 1.6td JX. The guys had some issues with the cooling system...

3 Replies

2476 Views

Last post by BryntheBrick
16 Sep 2016, 12:09
Engine choice?

Last post by hightop ratty « 15 Sep 2016, 22:25
Replies: 16
by philyoung » 08 Aug 2016, 12:20
1

2
The 2.1 MV WBX engine in my krankenwagen is poorly. Not terminal yet but is going to need major work soon. There are a lot of choices and I'm...
16 Replies

9703 Views

Last post by hightop ratty
15 Sep 2016, 22:25
Bleeding cooling sysytem

Last post by BryntheBrick « 14 Sep 2016, 21:26

by BryntheBrick » 14 Sep 2016, 21:26

Hi,

I have just had as replacement engine put in my 88 t25. It is a 1.9td AAZ replacing a 1.6td JX. The guys had some issues with the cooling system...

0 Replies

1894 Views

Last post by BryntheBrick
14 Sep 2016, 21:26
wire? temp sender?

Last post by weegaz22 « 13 Sep 2016, 16:07

by weegaz22 » 13 Sep 2016, 16:07

hi guys noticed a loose wire on my engine, looks like it could be off the sender next to it but just wanted to confirm with someonone in the know...

0 Replies

1807 Views

Last post by weegaz22
13 Sep 2016, 16:07
Where to fit the water expansion tank on a 1Y

Last post by Jonnyb416 « 12 Sep 2016, 22:21
Replies: 2
by Jonnyb416 » 12 Sep 2016, 08:10

My van doesn't have the expansion tank so I bought one, thing is, it won't fit where I think it should if there was a 1.6 engine there.

Has anyone...

2 Replies

2314 Views

Last post by Jonnyb416
12 Sep 2016, 22:21
Pre-MOT jitters...

Last post by davegsm82 « 10 Sep 2016, 15:22
Replies: 1
by Hoopy_Frood » 09 Sep 2016, 14:55

After 12 months off the road, a new engine (done by me), and lots of welding (done by someone who knows what they are doing) I am almost ready to MOT...

1 Replies

1158 Views

Last post by davegsm82
10 Sep 2016, 15:22
Over raving cuts out

Last post by mrhutch « 08 Sep 2016, 22:50
Replies: 2
by fdb » 08 Sep 2016, 20:42

I fitted a aef fabia 1.9 engine. If I change down too low a gear by accident and overrev the van cuts out and puts the timing out. My mech says it's...

2 Replies

1400 Views

Last post by mrhutch
08 Sep 2016, 22:50
AAZ tuning, bigger turbo.

Last post by MGP « 08 Sep 2016, 20:31
Replies: 3
by Paulf1969 » 08 Sep 2016, 09:58

Please help!!!

I've read everything humanly possible on tuning the AAZ engine, but I'm still as confused??

I understand the fuel pump mods.
I...

3 Replies

4472 Views

Last post by MGP
08 Sep 2016, 20:31
Oil Loss with no leaks or Smoke

Last post by Oldiebut goodie « 07 Sep 2016, 09:21
Replies: 7
by crazymilk » 11 Jul 2016, 09:21

hi all
Finished my EJ25 Subaru conversion a few weeks ago on my 1985 VW T25.
Had the heads skimmed, replaced all gaskets/seals ect new water pump,...

7 Replies

2601 Views

Last post by Oldiebut goodie
07 Sep 2016, 09:21
AHU replacement engine, HELP needed!

Last post by syncroandy « 04 Sep 2016, 21:58
Replies: 1
by thelyonsfamily » 04 Sep 2016, 18:18

So, we have had to replace our original 1985 1.6 turbo diesel engine after it had done over 200,000 miles.... got an Audi 1.9 TDi engine AHU code...

1 Replies

1814 Views

Last post by syncroandy
04 Sep 2016, 21:58
Busfest to be or not to be (hole in sump)

Last post by T25_steveo « 02 Sep 2016, 08:08
Replies: 2
by T25_steveo » 02 Sep 2016, 07:39

Well yesterday was a crappy day. After traveling to pickup my awning ready for Busfest on my way home I hit the smallest speed bump in the world a...

2 Replies

1790 Views

Last post by T25_steveo
02 Sep 2016, 08:08
Diesel Gearboxes

Last post by colinthefox « 25 Aug 2016, 20:42
Replies: 1
by motor-man » 25 Aug 2016, 19:50

Hi I'm currently converting my van from a 5 speed 1.9 dg into a 4 speed 1.9 1y diesel.

will my 5 speed 1.9 dg gearbox fit on the 1y engine after...

1 Replies

2083 Views

Last post by colinthefox
25 Aug 2016, 20:42
turbo on 1y engine

Last post by clone123 « 24 Aug 2016, 21:36
Replies: 30
by clone123 » 19 Jun 2016, 09:22
1

2

3
Hi all just a few questions if anyone can help, just in the middle of swapping my Jx 1.6td for a 1y 1.9d I have changed all the bits and bobs on the...
30 Replies

16843 Views

Last post by clone123
24 Aug 2016, 21:36
AFN Air filter options.

Last post by davegsm82 « 22 Aug 2016, 14:45
Replies: 3
by davegsm82 » 22 Aug 2016, 11:43

I'm looking to move away from the cone filter I have fitted presently on my AFN, I was considering using the original cylindrical filter that came...

3 Replies

2370 Views

Last post by davegsm82
22 Aug 2016, 14:45
Fantasy Engine

Last post by AdrianC « 22 Aug 2016, 13:57
Replies: 20
by Asw » 09 Aug 2016, 19:01
1

2
Evening all.
So I would like a little more power, but we bought an air cooled because we wanted an air cooled. I rebuilt the engine when we got the...
20 Replies

10739 Views

Last post by AdrianC
22 Aug 2016, 13:57

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