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Topic: 96 Passat Timing Belt Question  (Read 2811 times)

Offline Zen

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96 Passat Timing Belt Question

« on: December 10, 2008, 07:18:54 AM »
I replaced the vavle cover gasket on my 96 Passat last Sunday.  While I was working on it, I found that the timing belt is shot!  I would expect it to break at any second.  It's got the 2.0 engine . . . if the belt breaks will it wipe out the vavles?  I really need to keep the car on the road for a couple more weeks until I have some time off to fix it, but it's bad enough having to change the timing belt, I don't want to have to replace the engine.

Another question . . . I plan on changing the idler when I replace the belt.  Is there anything else I should replace while I've got it apart?  My experiance with water cooled VWs is pretty much limited to what I had to learn driving a 79 Dasher . . . and pulling the front clip apart on the Passat.  I had to replace the condensor and then turn around and replace the radiator.  If replaceing the belt involves taking the front of the car off, I can do that!  :lol:   I'm just lost once I get back to the engine.   :?

Offline swagginjello

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96 Passat Timing Belt Question

« Reply #1 on: December 10, 2008, 04:31:29 PM »
might wanna look into the water pump while your in there.  not to sure about the Gas engines, but on the TDIs it recomnded to do it at the same time.  also i have a vag-com if its needed in your aplication.  let me know if you need some help.

Offline dubtech

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96 Passat Timing Belt Question

« Reply #2 on: December 11, 2008, 07:37:21 AM »
Zen, the timing belt on the 2.0 (ABA engine code) engines is pretty easy to do and you don't have to pull the front of the car off to do it  :D

Unlike the newer engines, the water pump isn't driven by the timing belt so it's not one of those "well, since you're in there..." parts.  You should replace the tensioner/roller for the belt and since you'll have the distributor cap off to verify the distributor timing you may want to go ahead and do the cap and rotor.  If the distributor timing is off you'll get the following fault in the ECM "Camshaft position sensor G40 open/short circuit" so be sure the timing is correct on the distributor.  If you've got any drive belts that seem suspect or you don't know when they were last replaced, change them out as well.

The ABA engine can bend valves if the belt breaks but it won't do it 100% of the time - the automatics are worse than the manual transmission cars for whatever reason.

Offline Zen

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96 Passat Timing Belt Question

« Reply #3 on: December 12, 2008, 07:36:28 AM »
Quote from: "dubtech"
The ABA engine can bend valves if the belt breaks but it won't do it 100% of the time - the automatics are worse than the manual transmission cars for whatever reason.


Thanks for the info!  8-[  It's an automatic, so I guess I'll leave it sitting until I can get it changed.  All of the drive belts are looking pretty worn too, so I was planning on replacing them.  I put plugs/wires/cap and rotor on it not too long ago so they should be OK.

I've got a cheap timing light . . . I take it I might need so other diagnostic tools to check the timing?  What's a vag-com?  The mechanical part of it I can handle with no problem . . . but if I'm asking questions like those, am I in over my head?  Remember, my water-cooled VW experiance is VERY limited.  I'm kind'a lazy too.  If this is better left to a proffesional, talk me into it.   :lol:

Offline swagginjello

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96 Passat Timing Belt Question

« Reply #4 on: December 12, 2008, 02:49:51 PM »
computer software that can read the cars computer, and will let you make some changes.  as i said im not sure if it would be use full in your aplication or not.

Offline dubtech

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96 Passat Timing Belt Question

« Reply #5 on: December 13, 2008, 09:41:32 AM »
It's a '96, so it's the first year for OBD2.  OBD2 is a standardized diagnostic protocol that all passenger vehicles in the US use.

http://en.wikipedia.org/wiki/Obd2#OBD-II

Vag-Com or VCDS is an aftermarket software program that emulates the factory VW scan tool and allows you to communicate with the vehicle's various control modules.

http://www.ross-tech.com/

The timing belt setup on your Passat isn't that different than the one on your Dasher so if you changed the belt on the Dasher you'll be in familiar territory with the Passat.  You won't need the timing light for your Passat since all ignition timing is done by the ECM.

Offline Zen

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96 Passat Timing Belt Question

« Reply #6 on: December 13, 2008, 11:44:14 AM »
Quote from: "dubtech"
The timing belt setup on your Passat isn't that different than the one on your Dasher so if you changed the belt on the Dasher you'll be in familiar territory with the Passat.  You won't need the timing light for your Passat since all ignition timing is done by the ECM.


I did put a timing belt on the Dasher, so I'm going to give it whirl.  I just ordered the parts, so it'll be next weekend before I tear into it.  I just hope it's warmer then than it is now!!!

Offline Zen

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96 Passat Timing Belt Question

« Reply #7 on: December 31, 2008, 12:53:12 AM »
I've been working a few minutes here and there for the last week or so on the Passat.  The heads of two of the allen bolts in the crankshaft pully were rounded out.  I finally got them out by drilling the heads off of them, drilling a hole in the center of them and removing them with an eazy-out.  After an hour or so of gentle tapping with a 16 oz. hammer, I finally got the crankshaft pulley off.  This car spent the first 10 years of it's life in Penn. and New Jersey . . . The body really isn't rusty, but everything on the lower part of the engine is rusty (if it's got iron in it) or corroded (if it's got alluminum in it).  Anyway, after I got the pulley out of the way and got the lower timing belt cover off, all I can say is I'm VERY lucky!  The timing belt is about half as thick as a new one and back side of it is covered with cracks.  There is a ridge in the center of the back side of the belt where it's been dragging agaisnt the tensioner . . . that probably hasn't turned in the past 2 or 3 years.  I guess the only reason it didn't wear clean through and break from dragging on the tensioner is because it was WAY too loose!

The seal behind the crankshaft timing sprocket is starting to seep a little oil, so tomorrow, I'll be attempting to remove it.  I've got all the seals and o-rings, a new timing belt and a new idler with the updated (larger) stud.  The oil pan is leaking, so I am planning on pulling it off and replacing the gasket while I've got the car jacked up.  I'm also going to be putting a transmission filter in it.  When I get through with all that, I've got a new door handle and window regulator for the driver's door I've got to install.  And an exhaust leak to fix.  Maybe when I get all that done I'll pull the radio out an get the #'s I need to get the code.  Then maybe I'll try to figure out the why daytime running lights don't work and why the tail lights and dash lights go out when I put the lights on bright.  Then maybe I'll try to figure out why the cruise control only works about 10% of the time.  After that, it ought to be ready to roll for a few more miles.   :lol:
 
Rick, Hal, Travis, and anyone else out there that makes their living working on newer water-cooled VWs . . . I don't know what they pay you, but it's probably not enough!  :wink:

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