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Author Topic: Slowly discovering my vehcle history...  (Read 4735 times)

Offline seishuku

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Slowly discovering my vehcle history...
« on: 06:49:07 PM / 24-May-14 »
So I bought a 2002 Audi A6 to replace my S12 as a daily driver, they said they did the timing belt on it when the dealer got it... Yeah, they fucked that up.
Found one of the cam sensors disconnected (it's a V8 with VVT, uses one sensor on each head for sync), so I reconnected it and it did this weird surging while trying to accel... So I dove into the right bank head, found the intake cam off one tooth (it should be on the other side of the mark):

I fixed that, but it's still a little off, I suspect they fucked up the other bank too, just not as bad.

Then digging under the dash, I discovered two mystery yellow wires (at least it was automotive wire)... One was wired into the parking brake switch:

Not even soldered.
The other was tapped into the power block under the dash, to a 20amp fuse, then just behind the radio... Just sitting there, not even taped up.
I figured one of the previous owners must have had a in-dash DVD or NAV head unit, then just ripped out that and put the factory unit back in.

Then, that brings me to the factory head unit... 6-disc in-dash changer doesn't work, completely broken, tape deck seemed ok (like anyone uses those anymore), and it was pretty obvious that someone had taken it apart and tried to fix it at one point.
So I figured since the changer was busted, I might as well just remove it (it's just a single connection module in the head unit), then I modified the tape deck so it thinks it always has a tape in, then tapped into the audio inputs to the DSP chip and added an aux input:





Now, I can at least play music from my MP3 player again and still have a radio... No CD player, but I can deal with that (I don't think it could even play burned CDs anyway :lol:).

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Matt W.
Daily: 2015 Ecoboost Mustang
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Offline JonB

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Re: Slowly discovering my vehcle history...
« Reply #1 on: 10:08:56 PM / 24-May-14 »
Glad to hear your straightening it out. It a nice car.

Don't you just love that about dealers - pay out the wazoo to have the dealer do it at like $70 shop time, then the kid actually doing the work is making like $10 an hour. I suspect they did that before you got the car from your post. Its good that your capable of getting in there and fixing stuff; I'm sure a lot of car purchasers aren't capable.

Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #2 on: 11:20:26 PM / 24-May-14 »
Yeah, it wasn't something done on my dime, I would have taken it back otherwise! :lol:
I don't mind diving in, the thing with VAG, is that they just LOVE special tools... But most of them can be improvised, and some are just dumb and unnecessary.
They also LOVE sticking stupid shit behind that timing belt, like the thermostat for example... To change that, the belt comes off.
So if you ever plan on doing a timing belt, might as well change t-stat, chain tensioner(s), cam seals, valve cover gaskets, oil cooler seals, water pump, and on some engines the coolant intake pipe (for some reason they made it out of plastic).
But at least most of those items need to be changed when timing belt needs to be done anyway, so it's not THAT big of a deal.
Matt W.
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Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #3 on: 03:19:59 PM / 29-Jun-14 »
God... They fucked the driver's side head even more than passenger side.

Driver's side intake cam is out of timing just like the passenger side, but on top of that, they also managed to strip out 2 cam cap bolts and one chain tensioner bolt.
WTF is wrong with these people.
Matt W.
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Offline Baby

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Re: Slowly discovering my vehcle history...
« Reply #4 on: 04:16:34 PM / 29-Jun-14 »
How do people fuck up so badly and feel okay about themselves selling it to someone like they didn't.

Offline sideways_s12

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Re: Slowly discovering my vehcle history...
« Reply #5 on: 08:22:58 PM / 29-Jun-14 »
How do people fuck up so badly and feel okay about themselves selling it to someone like they didn't.

^^this!

Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #6 on: 08:05:45 PM / 19-Jul-14 »
Obviously someone with out a conscience.

It gets better! On further inspection, I found two more that have been already repaired! One was ok, the other I had to replace the helicoil.
At least it's all fixed now, I spent from 6:30pm last night to about 1am this morning carefully drilling, tapping, and inserting 4 helicoils.

I so wish I could just pull the engine and completely go over it, but I don't have the money or time. :lol:

Cam timing is still not quite right, but it's a step closer and now I have peace of mind that the intake cam isn't going to come loose and whip about the head.
Matt W.
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Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #7 on: 04:17:01 PM / 27-Jul-14 »
So I have the chains set correctly now... Discovered more weak threads in the head, two more stripped out... Threads just pulled right out, at least so far they've been ones that I can access.

But it's still not timed right, so after searching more, I decided to check the part numbers on the chain adjusters... Guess what? They have them in the wrong heads, so they're pulling the chain in the wrong direction when the VCT is active, which causes incorrect cam timing.

So I have to take BOTH banks apart AGAIN and swap chain adjusters.
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Offline Jay

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Re: Slowly discovering my vehcle history...
« Reply #8 on: 07:44:16 PM / 27-Jul-14 »
Why not just get new heads?? Those are all kinds of fucked up.
« Last Edit: 07:45:45 PM / 27-Jul-14 by Jay »

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Offline SchizophrenicMC

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Re: Slowly discovering my vehcle history...
« Reply #9 on: 07:49:21 PM / 27-Jul-14 »
It's an Audi. Replacing anything is a pain.
Nah, quoted for future use because not only is it lame and old, but it's a direct link to Schizo posting up homoerotic menswear fanfiction.
Quote
zololn: wheres the check engine light on the s12?

Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #10 on: 08:14:04 PM / 27-Jul-14 »
I want to get a new driver's side head, all those repaired threads bug the crap out of me... The passenger head I didn't have any problems with, other than the apparently wrong chain adjuster.
I don't have the money for one though, just gotta deal with what I got for now.

It's not a huge problem, just a big pain in the ass... Of course this wouldn't be a problem if the previous mechanic wasn't a complete dumb-ass.
« Last Edit: 08:15:31 PM / 27-Jul-14 by seishuku »
Matt W.
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Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #11 on: 04:43:22 PM / 09-Aug-14 »
Just finished swapping chain adjusters... 5 hours total (from bringing it into the garage to turning the key), not quite as long as I figured.

Had absolutely no issues getting the cams to line up correctly with the correct adjusters in the right head, no surprise there. :lol:

Drove it around a little, was a little rough at first (was adapted to run with the jacked up timing), but it smoothed out and no codes yet!
Matt W.
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Offline Romero

Re: Slowly discovering my vehcle history...
« Reply #12 on: 12:39:26 AM / 10-Aug-14 »
so that's what you where doing when i came up.

Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #13 on: 10:35:54 AM / 10-Aug-14 »
Yeah, by the time you got there I had both heads blown apart and was working on getting the correct adjusters in and the cams back in.
Matt W.
Daily: 2015 Ecoboost Mustang
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Offline Romero

Re: Slowly discovering my vehcle history...
« Reply #14 on: 11:16:14 AM / 10-Aug-14 »
thanks for the straps though because of them:
1. i made it back to madison safely
2. didn't get pulled over, and had all the people in the small towns looking at me.
3. I used them to pull out my front end and get the new hood on. and it's pretty flush.

Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #15 on: 11:43:51 AM / 10-Aug-14 »
:lol:
No problem, not a big deal. I think I paid $10 for a 4 pack of those, they come in handy... I usually use them for make-shift strut spring compressors.
Matt W.
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Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #16 on: 05:32:04 PM / 14-Aug-14 »
Holy crap, nearly a week later... No codes!!! :D
Though today I just noticed something was a little noisy... Like air... Then realized that I forgot a vacuum hose. No wonder it was running a little rough when I first started it! :lol:

I also have 6 out of 8 readiness bits set, that's FAR more than it was when I first got it (3 of 8), and after a few more days I should have 8 of 8! Then I could actually pass emissions (if we had any here).
Matt W.
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Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #17 on: 11:40:46 PM / 16-Aug-14 »
AAAAAAND for the reason the check engine light wasn't working...



Amazing that these people get PAID to work on cars....
Matt W.
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Offline seishuku

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Re: Slowly discovering my vehcle history...
« Reply #18 on: 07:41:50 PM / 18-Aug-14 »
Yay, more codes!
Not so much a big deal though, just insufficient flow for the secondary air injection...
It would seem my air pump is seized, so I'll have to pull it apart and see if I can't repair it.

Figures I fix the other issues so it can re-enable the emissions equipment, then find more that's broken. :lol:
Matt W.
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Offline EternalSwap

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Re: Slowly discovering my vehcle history...
« Reply #19 on: 02:05:43 PM / 22-Aug-14 »
Wtf is that gunk they used on the CEL hahahah
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