vtraudt

Previous owner found plastic in oil pan, took to local independent VW shop. They said the timing chain tensioner/adjuster is bad.
Car runs rough.
Found a whole bunch of codes (saved and erased; haven't checked which are coming back).

a) what are typical symptoms of bad chain tensioner?
b) how can I determine IF a tensioner is bad?
c) if bad tensioner, how to determine which bank/side?
d) what would a compression test on all 6 cyl tell?
e) what would a leak down test on all 6 cyl tell?
f) on my 2.7T, I was able to check the cam timing, and any timing adjustment done by the ECU with VAGcom (forgot what measuring blocks, but think 90-93 or so). How (if at all) can VAGcom be used to diagnose and narrow down?

vtraudt

Car is running awful.
Lots of misfires on cyl 1-3 (bank 1, pass side).
VAGcom Blocks 90-93 show:
90: cam adj. intake B1: 34 deg
90: cam adj. intake B2: -3 deg
93: phase pos intake B1: 0.0 deg
93: phase pos intake B2: 0.0 deg
Also: "Cam Ctrl. Off"

With crank in TDC and cam lock bar installed, TDC mark is off by only 1 mm (= 'right on').

I removed the valve covers; no obvious damage to chain tensioner or tensioner guide pieces (at least the parts I can see; is there a 'bottom' guide also?)

How can VAGcom show 37 degree cam difference (in block 90) and NO phase difference in block 93?

How can VAGcom show 34/-3 degree timing in block 90, and the cams/timing are correct?

BTW: NO CEL

Photos here:

http://s853.photobucket.com/user/vtr...sat%20V6%20ATQ


Full scan below













VCDS Version: Release 11.11.6 (x64)
Data version: 20121223

Thursday,27,June,2013,11:50:48:36008

Chassis Type: 3B - VW Passat B5
Scan: 01 02 03 08 15 16 17 19 35 36 37 46 47 55 56 57 58 75 76 77


VIN: WVWWH63B92E005321 Mileage: 312590km/194234miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-551-ATQ.lbl
Part No: 3B0 907 551 CG
Component: 2.8L V6/5V G 0001
Coding: 07501
Shop #: WSC 05311
VCID: 6ADB7A3916F341489EF
WVWWH63B92E005321 VWZ7Z0A3693809

10 Faults Found:
17931 - Crash Signal from Airbag Controller
P1523 - 35-00 - Implausible Signal
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 -
16688 - Cylinder 4
P0304 - 35-00 - Misfire Detected
16690 - Cylinder 6
P0306 - 35-00 - Misfire Detected
16685 - Cylinder 1
P0301 - 35-00 - Misfire Detected
16687 - Cylinder 3
P0303 - 35-00 - Misfire Detected
16686 - Cylinder 2
P0302 - 35-00 - Misfire Detected
16519 - Oxygen (Lambda) Sensor B1 S1; Heating Circuit
P0135 - 35-10 - Malfunction - Intermittent
16521 - Oxygen (Lambda) Sensor B1 S2
P0137 - 35-10 - Signal too Low - Intermittent
16514 - Oxygen (Lambda) Sensor B1 S1
P0130 - 35-10 - Malfunction in Circuit - Intermittent
Readiness: 0010 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-111-ASR.lbl
Part No: 3B0 614 111
Component: ABS/ASR 5.3 FRONT D00
Coding: 00032
Shop #: WSC 05314
VCID: D3A547DD217960804D9

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 3Bx-907-044.lbl
Part No: 3B1 907 044 J
Component: CLIMATRONIC B5GP 0003
Coding: 17200
Shop #: WSC 05311
VCID: 285F4031C87FB35848B

1 Fault Found:
00787 - Temperature Sensor in Fresh Air intake duct (G89)
30-00 - Open or Short to Plus

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 1J0-907-487-A.lbl
Part No: 1J0 907 487 B
Component: Lenkradelektronik 0002
Coding: 00008
Shop #: WSC 05314
VCID: 306FA851F0AFFB9890B

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 3B0-920-xx5-17.lbl
Part No: 3B0 920 926 B
Component: KOMBI+WEGFAHRSP VDO V01
Coding: 07235
Shop #: WSC 03060
VCID: 2345571DB15950001D9
WVWWH63B92E005321 VWZ7Z0A3693809

1 Fault Found:
01321 - Control Module for Airbags (J234)
49-00 - No Communications

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: Gateway K<->CAN 0001
Coding: 00006
Shop #: WSC 05314
VCID: F0EFE851B02F3B9850B

1 Fault Found:
01321 - Control Module for Airbags (J234)
49-00 - No Communications

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr Labels: 3B1-959-760.lbl
Part No: 3B1 959 760 D
Component: Sitzverstellung 0101
Shop #: WSC 00000 000 00000
VCID: 2E53B629BA9BED68827

1 Fault Found:
01008 - Note; Emergency OFF Switch is Active!
000 - -

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 1C0-959-799.lbl
Part No: 1C0 959 799 C
Component: 0Q Komfortgerát HLO 0003
Coding: 00258
Shop #: WSC 05311
VCID: 377D934D15C12CA0D11

Subsystem 1 - Part No: 1C0959801
Component: 0Q Tőrsteuer.FS KLO 0003

Subsystem 2 - Part No: 1C0959802A
Component: 0Q Tőrsteuer.BF KLO 0002

Subsystem 3 - Part No: 1C0959811
Component: 0Q Tőrsteuer.HL KLO 0002

Subsystem 4 - Part No: 1C0959812
Component: 0Q Tőrsteuer.HR KLO 0002

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: 1J0-035-18x-56.lbl
Part No: 1J0 035 180 B
Component: Radio DE2 0005
Coding: 04041
Shop #: WSC 05311
VCID: 1E3366E99A3B7DE8327

No fault code found.

End ---------------------------------------------------------------------

vtraudt

Passenger side (bank 1) cam chain tensioner/adjuster was bad, bottom guide piece missing, chain cut into aluminum. Also 'rotated' (wear marks NOT in line with guide).

Replace. Correct timing (cam lock bar and TDC mark on crank perfect; VAGcom measuing blocks 90-93 show zero).

Fresh oil (German Castrol 0W-30) and filter (Mobil 1 M204).
New air filter.
Cleaned MAF sensor.

Also replace spark plugs (installed copper NGK BKR6E). Initial gap 32 (per lookup by parts store). Running a bit rough. Chilton says 63 (!). Googled, and found SEVERAL gaps, ranging from 34 to 63.

What is the CORRECT gap for the plain copper plugs?

Also noted noise for a few seconds during cold start.
Is the cam tensioner using hydraulic (or spring pressure), and oil is not getting to the tensioner quick enough?

Is the ATQ engine prone to sludge, clogged oil pump pickup tube, clogged oil pump?

Want to make sure everything is up to snuff before putting car through 'stress test'.