urgent help needed 1.9 AFN engine (similar to 1Z, AHU, 1Y)

for questions and answers about alternative power transplants on the T25, GTi, Porsche,Subaru etc, this is the place. You must register to post but anyone can read.

Moderators: User administrators, Moderators

Post Reply
User avatar
937carrera
Registered user
Posts: 3599
Joined: 05 Apr 2015, 19:29
80-90 Mem No: 16333
Location: N Yorks.

urgent help needed 1.9 AFN engine (similar to 1Z, AHU, 1Y)

Post by 937carrera »

Stopped for a poorly T25 near Helmsley

Looks like it has skipped on the cambelt

Can anyone direct to instructions to set the timing

Assume injection pump need doiing as part of the process

Any special tools needed, it is hard to identify timing marks
Last edited by 937carrera on 14 Aug 2019, 08:39, edited 1 time in total.
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine

User avatar
937carrera
Registered user
Posts: 3599
Joined: 05 Apr 2015, 19:29
80-90 Mem No: 16333
Location: N Yorks.

Re: urgent help needed 1.9 AFN engine

Post by 937carrera »

Just an update after about an hour providing assistance.

One of the fingers on the back of the tensioner that came off is bent - not sure how that has happened, perhaps the tensioner came loose ?

I think we managed to figure out where the crank needed to be, probably where the injection pump should be set, but the camshaft sprocket timing eluded us.

It was also proving difficult to get the crank / cam timing in the right place, without valves meeting pistons, I am suspecting they met when the belt jumped. Apparently the engine became very loud with many bad noises.

The van is being towed home as it was clear we were unlikely to get it running, despite a fair bit of determination.

The owner now knows about us and this thread, so if we could post some useful instructions I am sure it will be appreciated.
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine

User avatar
937carrera
Registered user
Posts: 3599
Joined: 05 Apr 2015, 19:29
80-90 Mem No: 16333
Location: N Yorks.

Re: urgent help needed 1.9 AFN engine

Post by 937carrera »

Useful video, but doesn't properly address setting the timing from scratch as it is for a running engine

https://www.youtube.com/watch?v=Vv9hW7US5fk

What looks like a good start to the job but the important bit is hidden behind a "premium" membership

https://www.myturbodiesel.com/wiki/timi ... i-removal/

and kit available from the usual supplier - it seems from reading around that water pump replacement is recommended at the same time

https://www.brickwerks.co.uk/cam-belt-k ... u-etc.html

and a couple of other useful threads,though in this case the pump timing is just manual

https://www.clubgti.com/forums/index.ph ... fn.224338/ shame the pictures are missing

http://www.tdiclub.com/articles/A3-TimingBelt/
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine

User avatar
Oldiebut goodie
Registered user
Posts: 7243
Joined: 18 Apr 2008, 01:19
80-90 Mem No: 11135
Location: Eastern Angle

Re: urgent help needed 1.9 AFN engine (similar to 1Z, AHU, 1Y)

Post by Oldiebut goodie »

Just use a Haynes for the vehicle that the engine came out of for things related to the engine is the obvious answer! I use the VW Golf and Vento Feb 1992 to Mar 1998 for my 1Y. Saves finding stuff on t'internet and printing it off. Mine covers AAZ, 1Z, 1Y, AAM, ABS, 2E, ADZ, ADY, AEK, ABF, ABD, AEA,ABU, but not AFN.
The only timing mark that would be used is the flywheel one so don't bother looking for any. Camshaft is easy enough - flat plate and two sets of feeler gauges in slot on rear of cam.
Good chance that you will be looking at bent valves though.
1.6D 2019 VW T-Cross
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶

User avatar
lloydy
Registered user
Posts: 8013
Joined: 24 Nov 2009, 17:54
80-90 Mem No: 5262
Location: cheam surrey

Re: urgent help needed 1.9 AFN engine (similar to 1Z, AHU, 1Y)

Post by lloydy »

Basic timing is done with flat plate on the cam, and a peg through the pump pulley into the backplate. Then of course timing mark on flywheel/clutch plate.
Pump timing is adjusted via VCDS on a lap top.
But if the timing belt has gone, it's a interference engine so highly likely damaged to valves at a minimum.
Time is a drug. Too much of it kills you

Post Reply