CAM shaft chain roller Number

Tiny
HAMBONE31
  • MEMBER
  • 1999 VOLKSWAGEN PASSAT
  • 172,000 MILES
Bought car at a good price because OBD codes kept comming up and runnabillity problems. Took off valve covers to check settings out and found the number of chain rollers between notches on gears of the DOHC 2.8L motor, Bank1 and Bank2, were not correct according to repair manual. Set at 16 rollers and closed up. When I started car 3 codes came up, both cam shaft sensors poen curcuit to Bat. And Engine position sensor. I knew Engine position was ok because ignition system was working even though it was running rough. Disconnected neg. Bat. Cable and quit for the night. Next mourning started car and only 1 code lit up, Cam sensor Bank2 open curcuit. Cleared code 2 more times then replaced sensor. After replacing sensor car will not run now, rough or at all, will not start now. HELP
Monday, July 16th, 2012 AT 6:09 PM

30 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Sounds as if the valve timing is out, have you checked this using your manual as yet?
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Tuesday, July 17th, 2012 AT 8:01 AM
Tiny
HAMBONE31
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Yes, timed with Bar & TDC pin. Dbl checked twice on timing and chain rollers are at 16 between cam shaft gears
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Tuesday, July 17th, 2012 AT 12:12 PM
Tiny
HAMBONE31
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I'm thinking electrical but don't know where to start. Can anyone help me on this, there is a cookie in it for you if you can.
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Tuesday, July 17th, 2012 AT 6:54 PM
Tiny
RIVERMIKERAT
  • MECHANIC
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Knowing what codes its throwing might prove very helpful to us. Check continuity between the cam sensor, power, ground, and the ECM. Also make sure it's properly seated.
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Friday, July 20th, 2012 AT 3:58 PM
Tiny
EXOVCDS
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I would first check to see if crank & both cam sensor are in sync
via a scope... or at least producing a signal.

A running compression test (or just cranking) with an ignition signal
sync of one cylinder, can tell you if your cam/crank timing is out.

http://www.autonerdz.com/wps500.html

Not much that can be done over the internet...

Good luck,

Thomas
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Friday, July 20th, 2012 AT 10:03 PM
Tiny
HAMBONE31
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Thanks all, did a trigger signal test for the coil and had one, manual stated if signal was present, engine speed sensor, camshaft position sensor and ECM were operating as they should. It stated that after any major overhaul the camshaft sensors need to be syncronized, anyone know what or how this is achieved?
I thought with cam timing bar and TDC pin used, syncronizing was completed, am I wrong to assume this?
Also when it quit starting, the starter turns motor over but it seems to be dragging even with new battery and jumped by another vehicle. This began right after I was trying to start the engine earlier, the oil idiot light began to blink on instrument panel. Any comments on this should be helpful.
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Saturday, July 21st, 2012 AT 1:28 PM
Tiny
EXOVCDS
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Can sensors are hard mounted. No adjustment. Yes, the lock bar should have taken care of the sync.

Did you have the cam sprockets loose when adjusting the belt? Did you tighten them after? The sprockets could have spun and the cams are now out of sync again?

The oil light will blink after extended crank. This is normal

Thomas
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Saturday, July 21st, 2012 AT 4:17 PM
Tiny
RIVERMIKERAT
  • MECHANIC
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It definitely sounds like the valve timing is still out. The dragging condition you describe happens when that's the case.
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Saturday, July 21st, 2012 AT 4:59 PM
Tiny
EXOVCDS
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Are the cam sensor shutter wheels installed correctly?

Thomas
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Saturday, July 21st, 2012 AT 5:06 PM
Tiny
HAMBONE31
  • MEMBER
  • 10 POSTS
Thanks again all, Have checked valve timing with bar and TDC pin again, everything was in sync. Will check reluctor ring on cam sensors, good to know about oil light also. Would like to check relays but don't know which one controls what, need help with this if anyone can. They are numbered and that's all I know.
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Sunday, July 22nd, 2012 AT 10:49 PM
Tiny
HAMBONE31
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  • 10 POSTS
Is there any other way to check valve timing than with chain roller count, TDC pin inserted in crank and use of cam timing bar? Please inform me if there is so I can check that too. Also ran compress text on all cylinders and all passed.
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Sunday, July 22nd, 2012 AT 11:03 PM
Tiny
EXOVCDS
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If you have spark, spray some gas/propane down the intake. To at
least see if she will run like that (which will confirm belt/cam/crank
timing is OK).

Thomas
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Sunday, July 22nd, 2012 AT 11:30 PM
Tiny
RIVERMIKERAT
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Well, I'd upload the schematics for the engine performance, but our reference material isn't letting me see them. Again.
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Sunday, July 22nd, 2012 AT 11:31 PM
Tiny
VWSCOTT
  • MEMBER
  • 66 POSTS
Passenger side tensioner 16 rollers. Driver's side 15 rollers. Had that same issue once then discovered this, it corrected the issue.
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Tuesday, July 24th, 2012 AT 10:36 PM
Tiny
RIVERMIKERAT
  • MECHANIC
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Thanks for the heads up vwscott. Hopefully it helps Hambone figure out and fix his problem. I'm still having problems getting schematics to load from our online reference.
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Wednesday, July 25th, 2012 AT 12:56 AM
Tiny
HAMBONE31
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Thanks, will try this and see
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Wednesday, July 25th, 2012 AT 2:10 AM
Tiny
HAMBONE31
  • MEMBER
  • 10 POSTS
I was thinking about the rollers and the driver side was at 15, pass. Side at 14. Went with manual on 16 both sides. That's just not right for them to do that or at least they could update manual. Hope you didn't get teed-off as bad as I've been Scott, but if it works I'm very glad you worked through it. I was beginning to have doubts in my ability to fix things. Just kidding, I still believe if I can't fix it someone knows how, just have to find them.
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Wednesday, July 25th, 2012 AT 2:33 AM
Tiny
HAMBONE31
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If you get the schematics to load rivermikerat, Please load them, I would like like to have them for future problems. Thanks
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Wednesday, July 25th, 2012 AT 2:37 AM
Tiny
RIVERMIKERAT
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And here they are. Finally.
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Wednesday, July 25th, 2012 AT 2:46 AM
Tiny
VWSCOTT
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Hopefully you didn't get the cams too far out of time. I think the driver side is upside down to the passenger side. The cam gear may point a roller as u count them - one cam usually does, even tho it's technically not all the way in it's still counted. Good luck!
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Wednesday, July 25th, 2012 AT 2:47 AM

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