Timing belt slack 4.2 - Club Touareg Forums
 
Thread Tools
Old 04-10-2019 Thread Starter
Junior Member
 
Touareg: Still looking
Join Date: Feb 2019
Second Vehicle: Still looking
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Timing belt slack 4.2



Needs done in 2k, last time the p/o did just the belt. Some other thread this might be normal even new in certain positions?


Sent from my iPhone using Tapatalk
BoostMeizer is offline  
Sponsored Links
Advertisement
 
Old 04-10-2019
Touareg Mechanic
 
TurboABA's Avatar
 
Touareg: 2014 V6 TDI
Join Date: Aug 2018
Location: KW, ON, Canada
Second Vehicle: VW 2
Posts: 1,172
Thanks: 1
Thanked 52 Times in 51 Posts
How drunk are you when posting? WTF are you saying?
TurboABA is offline  
Old 04-10-2019
Touareg Guru
 
Touareg: 2006 V8
Join Date: Sep 2006
Location: Wytheville VA USA
Second Vehicle: 2004 V6
Posts: 3,389
Thanks: 156
Thanked 319 Times in 279 Posts
Garage
I have the AXQ V8 and I have never managed to have enough slack to do that. There is a procedure to replace the 40V V8 thermostat, by stopping the engine in a certain point of the cycle so you have a lot of top end timing belt slack, but even those DIY do not show that much slack.

Check the engine for belt slack at least 4 times, with running the engine between each. The engine should stop at a different point each time the engine is shutdown. If all four stops are loose, then 99.8% chance you have a serious problem about to occur. I know that in some spots, the timing belt is tight with no slack along the top and you should be looking for that to happen.

If the timing belt is always that loose, I would severly restrict driving and set it up for a full belt replacement, scheduled to be done yesterday!

Since it only had the belt last time, do NOT skip or skimp or anything. Full belt with all tensioners, guides, water pump, and thermostat is indicated.
nickyt is offline  
Sponsored Links
Advertisement
 
Old 04-10-2019 Thread Starter
Junior Member
 
Touareg: Still looking
Join Date: Feb 2019
Second Vehicle: Still looking
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Oh thatís interesting thanks about the t stat.
I actually went through that on my 2.7t, didnít know about that procedure.

As soon as I turned the belt by hand it got tight like normal:


So I turned it by hand 2x a few times and it just seemed fine as can be. So I set it at TDC and the cam wings didnít seem perfect to my eye? Maybe this has to do with adjuster?

Broke out the bar to double check and its not perfect and slip in. I can get it in but it requires a bit of finesse. In my experience it should just slip in no resistance. So last guy probably didnít use the bar, I see the white out marks. I also assume that itís out a little bit the cam adjusters are picking up the slack. Or thatís how it is? I have no codes.











I got everything to do the full belt job and valve cover gaskets cam adjuster pads seals caps. I also ordered black oxide water pump bolts but got nervous about maybe them not being enough for aluminum and coolant and went with the updated oem bolts and oem crank pulley bolts, also some coolant. What a way to blow 50 bucks. They arenít here yet so Iím not gonna dig in quite yet.

All seems fine. I guess it must have just stopped at that certain point to get thebbekt out or perhaps the tensioner or cam adjuster bleeds down?


Sent from my iPhone using Tapatalk
BoostMeizer is offline  
Old 04-10-2019
Touareg Guru
 
Touareg: 2006 V8
Join Date: Sep 2006
Location: Wytheville VA USA
Second Vehicle: 2004 V6
Posts: 3,389
Thanks: 156
Thanked 319 Times in 279 Posts
Garage
Yes, it sounds like you just accidently stopped at the point of most slack. Talk about the luck of the draw.

If the slack is only showing up at one certain point, that is a characteristic of the 40 valve V8. I was only worried that the belt was going to be loose thru all points.

Since you find that turning the engine over results in places where the top slack is gone, then that is also normal for this engine.

Sounds like you are probably ok. Good luck on the new timing belt. My experience is that you have a decent (80/20) chance of the tensioner and guides lasting one extra belt, but try to get by with that twice and the parts will almost always fail.

Glad to hear that you are not going to try reusing the parts for the third belt. It is just easier to replace the *&*$# parts while you are in there.
nickyt is offline  
Old 04-10-2019 Thread Starter
Junior Member
 
Touareg: Still looking
Join Date: Feb 2019
Second Vehicle: Still looking
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Timing belt slack 4.2

Germans said it was normal on 4.2 because of the location. Someone stateside points out tensioner bleeding down...


Sent from my iPhone using Tapatalk
BoostMeizer is offline  
Old 04-10-2019 Thread Starter
Junior Member
 
Touareg: Still looking
Join Date: Feb 2019
Second Vehicle: Still looking
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts


Basically the opposite. Loose on the tension side would be bad news.


Sent from my iPhone using Tapatalk
BoostMeizer is offline  
Old 04-10-2019 Thread Starter
Junior Member
 
Touareg: Still looking
Join Date: Feb 2019
Second Vehicle: Still looking
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Where did you read there was a slack point to remove the T stat? Thatís pretty slick. Just removed my s4 2.7 and it was tight. It would have been nice to know more about this. Same belt, same part number.


Sent from my iPhone using Tapatalk
BoostMeizer is offline  
Old 04-10-2019
Touareg Guru
 
Touareg: 2006 V8
Join Date: Sep 2006
Location: Wytheville VA USA
Second Vehicle: 2004 V6
Posts: 3,389
Thanks: 156
Thanked 319 Times in 279 Posts
Garage
Quote:
Originally Posted by BoostMeizer View Post
Where did you read there was a slack point to remove the T stat? Thatís pretty slick. Just removed my s4 2.7 and it was tight. It would have been nice to know more about this. Same belt, same part number.
The Audi Guys are the knowledge base on the 40V V8 engine. Audi used that thing for over a decade.

audiworld.com/forums/a8-s8-d2-platform-discussion-8/changing-thermostat-without-removing-timing-belt

dognmonkey.com/audi/2000-a8-40v-thermostat-replacement-without-removing-t-belt
nickyt is offline  
Old 04-11-2019 Thread Starter
Junior Member
 
Touareg: Still looking
Join Date: Feb 2019
Second Vehicle: Still looking
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Timing belt slack 4.2

Glad this is normal or nothing too be too concerned with.
BoostMeizer is offline  
 

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Club Touareg Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Thread Tools



Similar Threads
Thread Thread Starter Forum Replies Last Post
04 Touareg 4.2 40V timing belt issue SeanD Engine, Transmission and Exhaust 3 10-10-2018 03:03 PM
Changing the timing belt on a 2004 Touareg V8 yo_clarkie Touareg DIY and Technical Info - DO NOT POST NEW THREADS ASKING QUESTIONS 50 12-05-2016 05:39 PM
DIY Timing Belt 4.2 V8 MarkLWarner Touareg DIY and Technical Info - DO NOT POST NEW THREADS ASKING QUESTIONS 7 12-26-2015 11:47 AM
Changed Timing Belt on 4.2 aaks38 General Maintenance & Repair 44 12-12-2014 09:07 AM
Another 2004 V8 Timing Belt Done gapp100 General Maintenance & Repair 10 09-25-2012 05:39 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome
 

VW Touareg News Delivered to your Email!

Stay up-to-date with Touareg news in your inbox.

unsusbcribe at anytime with one click

Close [X]