1990 Audi 100 Avant turbo. Op Project Creep

Ivan from memory of when i worked at a dealership when these were current models the only thing that I recall
was fuel pump relays. The foreman would ask for any 40a relay to use as as a subsitute.

Given the other problems you have i would assume you have disturbed some multi plug, or there is a fault on the
instrument circuit board. Golfs used to suffer from them burning out and also the fuse board corroding.

Just remembered something else

audi.7zap.com/en/rdw/audi+100+avant+quattro/a10q/1989-88/9/919-160010/

Number 38 is something that i recall is a voltage regulator we kept in stock, so must have used a few.
No idea how you test them being a parts chap.

Part number (171919803) is for a MK1 Golf, but it seemed to fitted to almost everything

Well my run of bad luck with this thing continues

While trying to work out why I have no spark the other day, I pulled the king lead off the dizzy only to find out that the terminal had rusted into pieces. Definitely no spark with no king lead.

The new set arrived this week. It turns out that they do not fit the normal terminal on spark plugs,you have to unscrew that and they connect directly to the thread instead. Unfortunately on my nice new iridium plugs, the terminals don't unscrew. This is when the swearing started.

So whacked the old plugs back in, a set of those gimmicky Bosch ones with three electrodes. Hate those things.

Still no spark.
Power to the coil. The timing must be out. I couldn't find the timing mark on the flywheel when I changed the belt so I used the one on the front pulley,which is a harmonic damper.
So cue 2 solid hours trying to find the flywheel timing mark. It's so inaccessible that I couldn't take a picture. After more swearing and chasing things that where being blown away in the high winds we have today, eventually I was able to scrape enough rust off the flywheel to discover the 0 indicating TDC.

With the engine at TDC, sure enough the cam timing was off by one tooth, the dizzy ting mark off slightly too.

While reading about these cars the other day I've found out a bit more about how they work. There's a phonic wheel on the flywheel and also a hall sensor on the dizzy. The ECU looks at both of these and if they don't match,it doesn't fire the coil. There's no messing with ignition timing on this system, at TDC the dizzy has two marks which need to be lined up. The ECU then adjusts the timing while the engine runs, necessitating a wide rotor arm tip. In fact, it's pretty much the only thing the ECU does. Fuel is mechanical k-jet.

Anyway, front of the car dismantled again,the timing belt was moved one notch. Thought I'd quickly give it a start to see if that had fixed it so made sure everything was out the way and turned it over. It fired straight away and almost as soon as it had I shut it down as I heard something untoward at the front end. Walked round the front to be meeted by carnage


What the actual f*** has happened here? I could only presume the power steering belt had got blown into the timing belt

Really curse word off by now, I took the front pulley and lower cover off only to discover that one of the timing cover spacers had fallen into the belt. Can't believe I didn't take them off before attempting a start.




It's also snapped off a bit of the engine casting, but it's only a bit thats just there to cover the cam belt at the very bottom.

I'm hoping I haven't bent any valves. The engine stopped at TDC but I'm hoping it's on the exhaust stroke as the cam is 180 out. The cam belt never snapped, only flipped over so I'm hoping it more or less kept its timing.
You can just about make out the white paint I put on the cam pulley is 180 out and the same with the dizzy marks





For now I've ordered a new belt and plugs. We'll see if engine is ok once it's changed

But at least I found out why it wasn't firing

Good luck man 🍀

It feels wrong to like this, but it's a sympathetic like! Really hope you've got away with no damage - hopefully you've exhausted all your bad luck by now.

Another vote for the Golf wheels suiting it, but I can see they're fairly low down the priority list at the moment!

I ran 8x16 Porsche 928 S4's on mine - suited it well!
But i have seen a few on OZ Superturismo's in 7x17 - they looks amazing!

Hopefully it's not an interference engine. I didn't hear any untoward noises, just the belt shredding, hopefully it'll be good

Due to another MOT fail sheet as long as my arm on her modern golf, I've been somewhat delayed on getting onto the Audi.

But it runs!


Starts a lot quicker than it did before and I seem to have gotten away with the cambelt fiasco.


So, started throwing it all together this afternoon


New plugs. Again.


The pipe going from the intercooler to the inlet has completely fallen apart. The inner was held in with loads of superglue by the look of it and it was at risk of injecting chunks of the stuff.
So I've cut it short for now. It's not ideal and I'm looking for a replacement. The cheapest I can find at the moment is a silicone one from 034 Motorsport in America.


In addition to that, all the jubilee clips are knackered and will need replacing. Must have been a hell of a lot of boost leaks

Also on the replacement list is the alternator adjustment screw. I've found one for a MK1 golf which looks similar.

Knackered


I've also found a new grill on eBay which looks slightly nicer than mine.

And it'll need new rear tyres too. Other than that it's golden

Seems eager now! Sounds nice.

That alternator adjuster is used on lots of 80s and early 90s VAG stuff, though most of the used ones you happen across look a lot like yours. Already chimped.

Audi do have strange (and highly optimistic IMO) ideas about how much boost hoses should cost. That is why the intercooler to manifold one on my A6 is made from a selection of odds and sods I found in the scrapyard. It’s lasted longer that the original now. Audi wanted £140 +vat for it about 12 years ago.

Nick