T25 Alternative Engine Forum

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Most liked posts	Author	Posted	Liked	Forum
Problème huile suite transformation moteur en golf gti 3	Fort	13 Aug 2026, 07:50	Once this week	T25 Alternative Engine Forum
Problème huile suite transformation moteur en golf gti 3	colinthefox	12 Aug 2026, 19:59	Once this week	T25 Alternative Engine Forum

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Last post

1.9DG to diesel swap.

Last post by DavidS « 10 Aug 2025, 21:37

by DavidS » 10 Aug 2025, 21:37

I used to own a T25 with a 1.7KY engine which not obviously not quick, but it was very reliable and pretty economical. I had planned to put a 1Y in...

0 Replies

157972 Views

Last post by DavidS
10 Aug 2025, 21:37
Cosworth 2.9litre in my Crewwy

Last post by dickspanner « 07 Aug 2025, 19:53
Replies: 302
by dickspanner » 04 Jul 2006, 15:56
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Hi folks

Not been on for a while but have just farmed through all V6 threads again.

I have gone and done it, I have bought the Granada Cosworth...
302 Replies

384004 Views

Last post by dickspanner
07 Aug 2025, 19:53
Power steering pump

Last post by Aidan « 27 Jul 2025, 09:14
Replies: 2
by paradox » 26 Jul 2025, 16:09

I’ve a 1.9 TDi Passat engine in my van
Despite fitting a new belt and making sure it’s tensioned correctly
It slips the belt and squeals at full...

2 Replies

364871 Views

Last post by Aidan
27 Jul 2025, 09:14
1.9d 1Y exhaust.

Last post by BarnyE « 26 Jul 2025, 18:37

by BarnyE » 26 Jul 2025, 18:37

Hey all, been reading up on this and I’ve got myself more confused than ever.

So long story short inherited someone else’s bodge of a conversion....

0 Replies

479528 Views

Last post by BarnyE
26 Jul 2025, 18:37
AAZ VS Air cooled

Last post by dcworm57 « 16 Jul 2025, 05:12
Replies: 6
by davegeezzer008 » 27 Jun 2025, 19:58

Im having problems getting my AAZ pump rebuilt as bosch don't make many parts for the VE pump any more, so I'm just thinking ahead about my options...

6 Replies

166212 Views

Last post by dcworm57
16 Jul 2025, 05:12
Engine swop question

Last post by colinthefox « 11 Jul 2025, 21:08
Replies: 1
by aimlessrock » 11 Jul 2025, 19:43

Hi,

I was looking at the engine in my t25 and noticed that someone has tipped the letters AEF on it.

It looks different to the pictures of the...

1 Replies

39271 Views

Last post by colinthefox
11 Jul 2025, 21:08
AAZ upgrade turbo and realistic power

Last post by syncroandy « 08 Jul 2025, 14:55
Replies: 1
by TommyJenko » 21 Jun 2025, 16:40

Hi guys I have a AAZ in bits that came with my van, I was going to rebuild it but looking at the turbo it’s a kkk-k03 which seems a bit small for the...

1 Replies

39022 Views

Last post by syncroandy
08 Jul 2025, 14:55
1.8T Sump Bolt Access

Last post by Vaughanylive « 06 Jul 2025, 07:43

by Vaughanylive » 06 Jul 2025, 07:43

I’ve got a 1.8T converted Syncro (AUM stamped block, but cable throttle) with a custom mild-steel sump made by whoever did the conversion. The paint...

0 Replies

158251 Views

Last post by Vaughanylive
06 Jul 2025, 07:43
AHU TDI Vibration Damper Pulley testing

Last post by hotpod « 28 Jun 2025, 08:52
Replies: 8
by hotpod » 31 Mar 2025, 15:29

Does anyone know how to test if the vibration damper pulley ( harmonic balancer) on the crank shaft is in good shape?
Mine drives the ribbed...

8 Replies

52250 Views

Last post by hotpod
28 Jun 2025, 08:52
AGG seized - Oil starvation on steep inclines?

Last post by silverbullet « 20 Jun 2025, 06:42
Replies: 15
by Hansa » 04 May 2025, 10:24
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Not quite the first post I planned to make, but 2k miles after buying an AGG engined '86 Syncro, it stalled as I pulled into my garage. 30 minutes of...
15 Replies

63911 Views

Last post by silverbullet
20 Jun 2025, 06:42
TDI annoying pause when pulling away

Last post by syncroandy « 15 Jun 2025, 16:14
Replies: 9
by hotpod » 06 Jun 2025, 09:22

1997 AHU ETDI
The question is: When I first pull away in the van, it starts moving then has an annoying momentary drop in revs after which it is...

9 Replies

43607 Views

Last post by syncroandy
15 Jun 2025, 16:14
Subaru ej20 engine swap education wiring

Last post by R0B « 15 Jun 2025, 09:39
Replies: 3
by Mansfldfox » 12 Jun 2025, 16:09

Hi I have a 1984 t25 campervan which I have fitted a Subaru ej20 non turbo engine I need help with the wiring of the Ecu i have both the Subaru and...

3 Replies

36958 Views

Last post by R0B
15 Jun 2025, 09:39
Alternator/water pump drive belt - adjustment

Last post by Lio « 12 Jun 2025, 17:21
Replies: 8
by Bison535 » 04 Oct 2024, 02:27

Hi 80-90 guys
There always seems a need to make adjustment to the tension of my drive vee belt ! Once I hear a squeal I know it needs adjustment...

8 Replies

79627 Views

Last post by Lio
12 Jun 2025, 17:21
Oil Capacity (Diesel 1Y Engine)

Last post by The Hairy Camper « 10 Jun 2025, 15:54
Replies: 2
by The Hairy Camper » 10 Jun 2025, 15:40

Just replaced a leaky sump gasket/baffle plate. Drained all the oil, replaced oil filter, and refilled with 4.5L of 15W40 oil. However, the dipstick...

2 Replies

35889 Views

Last post by The Hairy Camper
10 Jun 2025, 15:54
1z tdi ecu

Last post by bundyboy « 10 Jun 2025, 08:34
Replies: 5
by Wallace748 » 14 Oct 2015, 19:03

Hi, I'm running a 93/94 1z tdi with the 68 pin ecu. Struggling to get coms via diagnostic plug( it's the old two pin type) anyone help me out with...

5 Replies

35673 Views

Last post by bundyboy
10 Jun 2025, 08:34
4 digit pin code for AHU ECU Login?

Last post by hotpod « 30 May 2025, 07:47
Replies: 4
by hotpod » 29 May 2025, 08:20

Does anyone know a way to find the 4 digit pin that VCDS requires to be able to do things like add new keys?
I've been reading a lot of forums but...

4 Replies

32092 Views

Last post by hotpod
30 May 2025, 07:47
1Y coolant pipes/system

Last post by colinthefox « 21 May 2025, 20:34
Replies: 15
by BarnyE » 30 Mar 2025, 14:20
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Hi all, my van has had a 1Y engine swap in the past. Whoever swapped it seemed to have ran out of enthusiasm once the got to the coolant system and...
15 Replies

66167 Views

Last post by colinthefox
21 May 2025, 20:34
Subaru Engine Identification Needed

Last post by Basilakios « 20 May 2025, 16:25
Replies: 5
by Basilakios » 19 May 2025, 21:41

Hi!
I've very recently bought a new (to me) T25 which has a Subaru engine. I wasn't especially looking for one with a Subaru engine but it drove...

5 Replies

39084 Views

Last post by Basilakios
20 May 2025, 16:25
1.8T Wiring/Fault Codes

Last post by Splurt « 17 May 2025, 10:54
Replies: 17
by Vaughanylive » 29 Apr 2025, 18:44
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I’ve got a T25 Syncro with a 1.8T conversion (AGU) which seems to be running ok but out of curiosity I plugged it into my VCDS Lite which is showing...
17 Replies

74481 Views

Last post by Splurt
17 May 2025, 10:54
AHU immobiliser stuck on. Help please

Last post by hotpod « 14 May 2025, 09:27
Replies: 6
by hotpod » 03 May 2025, 09:41

1997 VW Golf AHU tdi in a T3 van. Installed in 2014

I went to leave work the other evening and the van started for a second and then died. I am...

6 Replies

44538 Views

Last post by hotpod
14 May 2025, 09:27
Is it possible to determine the buildyear from a engine number?

Last post by Aidan « 12 May 2025, 17:38
Replies: 5
by busbart » 10 May 2025, 15:12

I wonder, is it possible if you have the type and engine number to determine the year when that engine was build?

VW 1Y 1,9D/TD 368 772

5 Replies

37246 Views

Last post by Aidan
12 May 2025, 17:38
The SA 2.6i Microbus thread

Last post by silverbullet « 09 May 2025, 19:58
Replies: 244
by silverbullet » 23 Mar 2011, 12:07
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I appreciate that this is pretty obscure but here goes...broke down in the 2.6 SA on Friday, had to be recovered :oops: thought I had fixed it with a...
244 Replies

424408 Views

Last post by silverbullet
09 May 2025, 19:58
Leaking Cooling Pipe Replacement

Last post by Jdavis « 03 May 2025, 05:39
Replies: 4
by Jdavis » 04 Mar 2025, 08:49

Hello all. New to the site and to T25 ownership.

I have a 1982 T25 Camper with a refurbished 2l Golf engine. The coolant pipe has a big leak and I'm...

4 Replies

79104 Views

Last post by Jdavis
03 May 2025, 05:39
Sump Plug

Last post by Aidan « 27 Apr 2025, 14:32
Replies: 7
by Burtybassett » 26 Apr 2025, 10:47

Trying to change the oil and the blasted Sump Plug won't undo.

Engine is cold and not been run today. Would it help if engine is warm ??

What to...

7 Replies

51029 Views

Last post by Aidan
27 Apr 2025, 14:32
aey engine

Last post by Vwt25campee « 26 Apr 2025, 09:29
Replies: 10
by warrior.1229 » 05 Feb 2015, 20:56

hi i am new to the t25 scene my wife has just bought me my first van but unfortunately the chap saw us coming it is a 1.6 cs diesel engine but i need...

10 Replies

49901 Views

Last post by Vwt25campee
26 Apr 2025, 09:29
Exhaust falling off

Last post by silverbullet « 23 Apr 2025, 18:07
Replies: 4
by therealchrisgray » 23 Apr 2025, 10:40

Hi all, I could use some opinions so I'm not completely at the mercy of a mechanic.

Exhaust started blowing yesterday on a motorway run. I've done...

4 Replies

35716 Views

Last post by silverbullet
23 Apr 2025, 18:07
VCDS Fault code deciphering AHU TDI

Last post by hotpod « 23 Apr 2025, 09:35

by hotpod » 23 Apr 2025, 09:35

I know why the vehicle speed signal is wrong and what I need to fix it but the ECU memory error is troubling and can anyone tell me what the...

0 Replies

43607 Views

Last post by hotpod
23 Apr 2025, 09:35
Engine Swap

Last post by Dueller « 18 Apr 2025, 11:41
Replies: 6
by Tattersall » 14 Jan 2025, 03:13

Hi I really want to build a camper and I've seen a few t3s with broken engines. If I buy a 2.1 that has no engine in. What would be easies/best for a...

6 Replies

60923 Views

Last post by Dueller
18 Apr 2025, 11:41
Alternators.. inline 4 engines

Last post by Dueller « 18 Apr 2025, 11:31
Replies: 6
by t25adict » 08 Apr 2025, 15:24

Would anyone know which engines VW Seat Audi used the alternator with the big spring under it.

It's the ones that bolt up for belt tension, but you...

6 Replies

29533 Views

Last post by Dueller
18 Apr 2025, 11:31
Diesel Engine Code Location

Last post by T25boy71 « 11 Apr 2025, 09:26
Replies: 6
by The Hairy Camper » 06 Apr 2025, 18:54

I was struggling to find the engine code on my 1Y today.

From what I can tell on the forum, it's meant to be in this location:

I couldn't see...

6 Replies

28908 Views

Last post by T25boy71
11 Apr 2025, 09:26
AEF (1.9D) engine, troubleshooting advice pls

Last post by therealchrisgray « 17 Mar 2025, 11:03
Replies: 7
by therealchrisgray » 15 Mar 2025, 09:38

Finally collected my van yesterday with its new old AEF engine. All seemed good at first, but then...

Pootling along, at any speed, I get an...

7 Replies

76002 Views

Last post by therealchrisgray
17 Mar 2025, 11:03
little advice pls

Last post by JeffRoo « 13 Mar 2025, 20:08
Replies: 17
by fh9977 » 04 Nov 2024, 12:05
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Hi, just need some advice on what I do with my syncro...

A few weeks ago I had a breakdown, diesel pump had ceased. Pump was refurbished,...
17 Replies

90606 Views

Last post by JeffRoo
13 Mar 2025, 20:08
engine change from jx to 1z

Last post by Oren Kipnis « 12 Mar 2025, 19:14
Replies: 1
by rossin84 » 10 Mar 2025, 08:15

good morning everyone, I am writing from Sicily (Italy), my multivan t3 bluestar 1.6 td jx has a blown engine, unfortunately it cannot be fixed and I...

1 Replies

50026 Views

Last post by Oren Kipnis
12 Mar 2025, 19:14
New engine

Last post by therealchrisgray « 01 Mar 2025, 13:38
Replies: 10
by therealchrisgray » 12 Feb 2025, 15:53

Hello all, I need some pretty basic advice and hoping one of you lovely people can help.

My unidentified old diesel engine turned out to be a 1Y...

10 Replies

62831 Views

Last post by therealchrisgray
01 Mar 2025, 13:38
New van with cologne v6 engine

Last post by Dueller « 28 Feb 2025, 17:30
Replies: 47
by Cableguy » 27 Jun 2010, 17:55
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Hi, I'm a newbie to this forum and also to the t25.
I've just bought a camper with an old school 2.8 cologne engine in it.
As soon as I turned the...
47 Replies

163958 Views

Last post by Dueller
28 Feb 2025, 17:30
EJ20E Lambda Wiring.

Last post by JackJosh « 07 Feb 2025, 21:34
Replies: 4
by JackJosh » 20 Jan 2025, 14:33

Hi All,

I was looking for some advice, if possible.
I have a VW T3 van and it has an EJ20e fitted. It also has an LPG system that I am unlikely to...

4 Replies

49507 Views

Last post by JackJosh
07 Feb 2025, 21:34
Jx flywheel on 1Y block

Last post by curtainsider « 28 Jan 2025, 17:55
Replies: 2
by curtainsider » 28 Jan 2025, 16:26

Hello all’

Can someone remind me if I need to re-mark my JX flywheel to TDC when fitted to a 1y or AAZ. Engine currently out of van with Jx...

2 Replies

46489 Views

Last post by curtainsider
28 Jan 2025, 17:55
Can a 1Y inlet manifold be modified to fit

Last post by colinthefox « 27 Jan 2025, 20:21
Replies: 3
by VwDanT25 » 04 Oct 2024, 19:20

Hi

completed a 1Y swap but using a turbo inlet manifold for the time being, the 1Y inlet mf wont fit due to hitting the bay wall.
has anyone...

3 Replies

43049 Views

Last post by colinthefox
27 Jan 2025, 20:21
Subaru ez30d h6, 4eat auto gearbox in a coachbuild

Last post by jamiegolf « 15 Jan 2025, 10:19
Replies: 61
by jamiegolf » 15 Oct 2023, 08:48
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Hey all,
After running around for a year with the ej20 and aap box (that’s been absolutely perfect btw!!) I feel it just needs. Little more oomph!!...
61 Replies

330825 Views

Last post by jamiegolf
15 Jan 2025, 10:19
No water temperature reading

Last post by slowcoach « 02 Jan 2025, 13:38
Replies: 3
by boxerairhead » 28 Dec 2024, 17:41

I've recently bought a T25 with an EJ20 engine in it. It all works and drives fine except the water temperature gauge doesn't work.
So far i've done...

3 Replies

39180 Views

Last post by slowcoach
02 Jan 2025, 13:38
Help on a Essex V6

Last post by TwinTurbo « 25 Nov 2024, 21:30
Replies: 11
by MyBlueT25 » 25 Nov 2024, 16:40

I have a 81 tintop with a v6 essex and struggling to get it started, ive replaced pretty much everything to do with spark and fuel except the...

11 Replies

56807 Views

Last post by TwinTurbo
25 Nov 2024, 21:30
Clutch Rattle

Last post by silverbullet « 10 Oct 2024, 14:36
Replies: 3
by BigBlueVan » 01 Oct 2024, 19:25

Hi All,

I have been trying to get my clutch to release on my conversion, ej20 engine, RJES bellhousing and release bearing, VW clutch disc....

3 Replies

46958 Views

Last post by silverbullet
10 Oct 2024, 14:36
Injector Flame Traps

Last post by johnxl « 04 Oct 2024, 22:23
Replies: 6
by johnxl » 03 Sep 2024, 14:09

Where on the injector should a flame trap seat? against the injector body or on the injector nozzle? The reason why I ask is because while checking...

6 Replies

41529 Views

Last post by johnxl
04 Oct 2024, 22:23
turbo hose

Last post by skell « 19 Sep 2024, 22:27
Replies: 1
by morganite » 22 Jul 2024, 16:01

Hi on last leg of aaz conversion, i need a hose to go from jx turbo to aaz inlet manifold, anyone know where to find one? or even better the part no...

1 Replies

35537 Views

Last post by skell
19 Sep 2024, 22:27
aaz pump repair

Last post by skell « 19 Sep 2024, 22:22
Replies: 1
by morganite » 12 May 2024, 18:51

Hi can anyone recommend a reasonable diesel injection pump engineering shop, to test and maybe repair, my 0460494346 injection pump to go on my AAZ...

1 Replies

36208 Views

Last post by skell
19 Sep 2024, 22:22
Clutch problems

Last post by Aidan « 19 Sep 2024, 18:29
Replies: 3
by Nelpy » 17 Sep 2024, 21:04

Hi

I’ve been having clutch problems for a while now - pedal going hard then soft, pedal moving up and down against my foot, clutch slipping,...

3 Replies

37907 Views

Last post by Aidan
19 Sep 2024, 18:29
Identifying engine

Last post by therealchrisgray « 17 Sep 2024, 10:49
Replies: 9
by therealchrisgray » 07 Sep 2024, 11:09

Hi all, my google skills are obviously not up to this but thankfully this forum is full of knowledgable people...

My old van had an engine...

9 Replies

44360 Views

Last post by therealchrisgray
17 Sep 2024, 10:49
EJ Subaru Engine - Fuel Breather Line

Last post by BigBlueVan « 14 Sep 2024, 20:14
Replies: 3
by BigBlueVan » 13 Sep 2024, 05:36

Hi All,

What have others done with the fuel breather line on their Subaru conversions?
The EJ engine has fuel feed, return and breather...

3 Replies

37738 Views

Last post by BigBlueVan
14 Sep 2024, 20:14
EJ Subaru Engine, vacuum non return valve

Last post by slowcoach « 08 Sep 2024, 22:07
Replies: 3
by BigBlueVan » 08 Sep 2024, 14:01

Hi All,

Original van engine 1.9dg had a one way valve on the vacuum line at the engine.
The Subaru EJ engine removed from donor vehicle did not have...

3 Replies

37403 Views

Last post by slowcoach
08 Sep 2024, 22:07
N108 valve 1.9TDI MK3

Last post by Aidan « 07 Sep 2024, 16:03
Replies: 2
by Iwallace » 07 Sep 2024, 09:00

Hi all.

My n108 valve on my mk3 1998 1.9TDI engine has been playing up for months now.
Has been repaired once but the wires keep coming loose with...

2 Replies

36405 Views

Last post by Aidan
07 Sep 2024, 16:03

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