Possibly fecked- help needed. A.5TDI AEL quattro

Needs to get out more Joined: Feb 18, 2010 Posts: 130

Car has been running great for last 10k. Oil and filters done and 244k on the clock.

However......

Yesterday I pulled Over to make a call. Left engine running and when finished went to pull away... It stalled. Tried to restart and it just wouldn't!!!

Tried jump leads-fail
Nipped round the corner to work grabbed a fuel filter and primed/fitted it.-fail

Got the AA out and after a charge on the battery and a squirt of carb cleaner she started. But wouldn't idle till semi warmish on water temp.

Took her for a run to charge battery and was doing 75-80 came off at slip road and started to loose power. Oil light came on and I immediately flicked her off and coasted in to a stop. Called AA out and In mean time i looked underneath an she has sprayed a little oil from somewhere onto cam cover. Oil level is fine and no oil water mix but now refuses to start point blank. Sounds like no compression but not confirmed yet..

Anyone any ideas???

I thinking compression test then go from there..

Posted: Sun Oct 28, 2012 8:39 pm

Does it spin over easily, as if it has lost all compression? Or does it turn over lumpy, as if it has lost one or two cylinders? Is it squirting oil, or is it fuel onto the rocker cover?

Seems like a compression test and find the leak source are your first steps!

Needs to get out more Joined: Feb 18, 2010 Posts: 130

Doesn't turn over easily. But has always been lazy to turn over. ( never had performance issue. Would sit at 110 all day without a moan.

It only spat a small amount of engine oil over cam cover.

Posted: Mon Oct 29, 2012 10:58 pm

When it ran (to charge the battery) was it lumpy or uneven, did it feel 'off' at all?

Are all belts intact and happy? could be the injector pump or timing belt (or both) has slipped?

+1 for the compression test. but check all the obvious too.

Needs to get out more Joined: Feb 18, 2010 Posts: 130

All belts good and intact. When it ran to charge battery it was lumpy.

I'm assuming injection pump.

Sadly now spares or repairs if anyone is intersted.

Don't want to scrap. But having to get rid as no storage space to work on her.

Inexperienced Joined: Jan 23, 2012 Posts: 27

its jumped a tooth on the cam belt
it must be ready for a new one
had this before
cant be completely sure though

mine was diagnosed by Jonathan (bladerunner)

Needs to get out more Joined: Feb 18, 2010 Posts: 130

Belt was only done 20k ago....

Posted: Wed Nov 07, 2012 8:12 pm

even so, it might be worth checking the timing before condemning the vehicle.

Camped on the site Joined: Sep 06, 2008 Posts: 368

Same symptoms as when the belt went on mine. Suggest you check pump and cam timing. If you decide to get rid, pm me, Im vaugely after a tidier shell.

Needs to get out more Joined: Feb 18, 2010 Posts: 130

Would love to keep but knowwhere to store her. Sad

Already had an offer of interest from a another member on here. Just waiting for confirmation from him..

Camped on the site Joined: Sep 06, 2008 Posts: 368

Ok, let me know!

Needs to get out more Joined: Feb 18, 2010 Posts: 130

Sold pending deposit. Pleased to announce that buyer has decided to put back on road rather then part out. Also offfered to get parts through work to Assit in getting her sorted.

Bandwidth Buster Joined: Aug 12, 2006 Posts: 803

Definetly fecked

https://www.dropbox.com/s/xtdrkbqpmo52t4y/20130828_173549.jpg

Piston one is quite badly damaged as seen in photo,all other pistons are fine.Most valves are bent slightly,I was expecting to see at least one that had snapped off

Camped on the site Joined: Sep 06, 2008 Posts: 368

Thats a blast from the past. In other news, mine has got a working engine again Smile

What you doing with the fecked one? Im still vaguely after a tidier shell, or maybe I'll just buy a C5.

Posted: Thu Aug 29, 2013 8:05 am

IME valves bend rather than snap, sodium cooled ones might snap as they've got hollow cores, but you wouldn't find those in a 90's oil burner Smile

If you're thinking of fragging it, I've got a growing list of bits I could do with.. Very Happy

Bandwidth Buster Joined: Aug 12, 2006 Posts: 803

I've seen snapped valves at least 3 times on these engines now from cambelt failures(tensioner failures in all cases) head/bottom end was completly ruined on all of them.

I have a very low mileage engine i got out of a v70 auto(in december last year lol) that is going into it,only just found the time/enthusiasm to get on with it.Stripped all the volvo rubbish off it and its just waiting for all the audi bits to go on,all the engine mounting holes including snub mount are present on the d5252t thankfully,I had 'heard' they weren't(usual internet dribble)

What parts are you after? I have a barn full of c4 stuff

Bandwidth Buster Joined: Aug 12, 2006 Posts: 803

looking at the photo on the top right you can see more of the piston has started to disappear.I know the car was run on veg oil/diesel mix for a while and I remember tutgareth(the previous owner) ran it on another type of oil for a while(rape seed or similar),not sure if this may have been a factor?maybe some kind of detonation or lean running?not sure how this affects diesels to be honest

Posted: Thu Aug 29, 2013 8:48 am

BMW valves bend, anyway - I've not destroyed that many audi engines (fingers crossed!)

Posted: Thu Aug 29, 2013 8:59 am

The steel shouldn't be affected by the oil/diesel itself, but I've seen pictures somewhere of damage caused to a piston by a head-gasket leak where the coolant has flashed to steam in an explosive way and caused serious pitting of the piston crown (looked like it had been eaten).
My theory is the right amount of water in the cylinder will flash to steam causing symptoms similar to detonation (pinking) in a petrol engine, only much more violent & destructive.

Is there any debris in the cylinder?

Bandwidth Buster Joined: Aug 12, 2006 Posts: 803

non at all

Camped on the site Joined: Sep 06, 2008 Posts: 368

When the cambelt went on mine, many valves were bent but none snapped. The Cam, however, was in 3 pieces!

Posted: Thu Aug 29, 2013 12:10 pm

non at all

Bandwidth Buster Joined: Aug 12, 2006 Posts: 803

I had another look at it yesterday as i was pulling the bottom end out,piston number 2 has actually got a small amount missing next to where the damage on no 1 is.Also the head gasket shows signs of failure between 1 and 2.Timing belt was quite slack when i first started taking it apart a few months ago so presumed the tensioner had slipped/failed,but now I am not so sure it was that which killed the engine.A mates a6 had slipped a fair way but kept running,luckily he found it and fixed it before it shat itself totally