GM Inside News Forum banner
1 - 20 of 78 Posts

·
Banned
Joined
·
1,846 Posts
Discussion Starter · #1 ·
This looks like the culprit in the 3.6L Timing Chain failure saga.

http://www.gmpowertrain.ca/Product/3.6 VVT/LY7 Summary.pdf

Smaller Pitch Timing Chain
The 3.6L V-6 VVT in the Cadillac CTS has a new timing chain with a smaller pitch (7.7
mm compared to 9.5mm previously) and more links. The chain features an inverted
tooth design. The smaller links engage at a lower impact speed, which decreases the
noise generated. In conjunction with the new chain, the number of teeth on the sprockets
is also increased, increasing the meshing frequency and further reducing noise and
vibration.
The new timing chain is a running change that will occur in all of GM Powertain’s V-6
VVT engines through the course of the 2007 model year.
Dual-Spray
 

·
Registered
Joined
·
8,904 Posts
What timing chain failure saga?

The 3.6L engines in everything from Lambda's to Cadillacs, to Zeta's are getting a bit of bad reputation... some have the timing chains fail at less then 4,000 miles. Sadly, as is the case with most engine packaging these days, the fix for this in the Lambdas requires removing the car from the engine and then having at it. At most dealers just re&re'ing the engine will run about $3000 before you even start fixing ANYTHING.

Head over to any Lambda form and you will not have trouble finding posts that look like:
Last week my 09 Traverse went in for service, check engine light.

We had to wait three day for the dealer replace a "dirty sensor".

This week the check engine light came on again and we took it back.

The dealer said that the timing chain was stretched out and needed to be replaced.

Anyone else have problems like this?
And then the threads light up like Christmas trees.
 

·
Banned
Joined
·
1,846 Posts
Discussion Starter · #11 ·
My dad is an assemblyman in the Toledo transmission plant. So you think GM is making sure the vehicle I randomly pick off the lot is trouble-free? Talk about conspiracy theories!
No I think the problem is the opposite! GM DOESN'T make sure any vehicles are trouble-free! People who directly depend on GM for their living, tend to ignore problems or blame them on something other than GM!
 

·
Registered
Joined
·
18,655 Posts
Even if its on 2% of the 3.6s then there is something amiss.

With that said, its usually a warranty repair and most are caught before catastrophic damage happens. At least it is something that is physically wrong and can be fixed rather easily especially compared to software or electrical problems.
 

·
Registered
Joined
·
3,730 Posts
No I think the problem is the opposite! GM DOESN'T make sure any vehicles are trouble-free! People who directly depend on GM for their living, tend to ignore problems or blame them on something other than GM!
So, what about people that plain ol' just don't have problems with their GM vehicles? :confused: Only people that have problems speak the truth, and people that don't are just ignoring problems?

And judging by initial quality studies, it seems no automakers make sure any vehicles are trouble-free. Nearly everyone is at or above 100 problems per 100 vehicles (or one problem per vehicle). Weird...
 

·
Registered
Joined
·
11,998 Posts
You can quite wondering! How about we get back to the technical question proposed about the cause of the timing chain problems.

Lets quit trying to ignore it and address it. What do y'all think? Is it the new small (7.7mm) size that is the cause of the failures or what?
Quite what? Thanks for getting back on topic though (I mean that honestly).

But yes the new chain is likely the problem.
 

·
Registered
Joined
·
15,633 Posts
You can quite wondering! How about we get back to the technical question proposed about the cause of the timing chain problems.

Lets quit trying to ignore it and address it. What do y'all think? Is it the new small (7.7mm) size that is the cause of the failures or what?
Well, lets search for " timing chain problems " and study the Ford, Toyota, Nissan, and VW responses that dominate the search for a clue as well as the frequently mentioned BMW, MBs, Audis and the less frequently mentioned Suzukis, and Mitsubishis.

First page looks like this.



1.
HELP-Timing chain problems - Ford Forums
We have been told that it is the timing chain. Here is the problem, Everyone we talk to tells us that there is a different number of timing chains on our ...
www.ford-forums.com › ... › Ford Explorer - Cached - Similar
2.
VWVortex.com - Finally ... a sound clip of timing chain noise
yeah i never thought that i had timing chain problems until i read this thread and it matched the strange noise/shaking i have ...
forums.vwvortex.com/showthread.php?1127339 - Cached
3.
HAS ANYONE HAD TIMING CHAIN PROBLEMS? | Nissan Quest Forum Community
Oct 7, 2009 ... Luckily for me I got my problem fixed. It wasn't the timing chain for me. I had some known as spark knocking/rattling AKA "pre-detonation". ...
questdriver.com › ... › 2004 - 2009 Nissan Quest - Cached - Similar
4.
Timing belt - Wikipedia, the free encyclopedia
In the internal combustion engine application, the timing belt/chain ... This is not a problem unique to timing belts since the same issue exists with all ...
en.wikipedia.org/wiki/Timing_belt - Cached - Similar
5.
DIY: Replace Your Timing Chain
One of the internal working parts that wear is the timing chain and timing sprockets. ... As the timing chain and sprockets wear, this precise timing of the valves gradually ... No-Start ProblemsJump Start a CarAutomatic Transmission ...
autorepair.about.com/cs/doityourself/a/aa042702a.htm - Cached - Similar
6.
Timing chain problem with Nissan sentra - CNET Car Tech Forums
Jun 13, 2005 ... Car Tech: Timing chain problem with Nissan sentra - Read Car Tech discussions and get tips and advice on this topic and others on CNET ...
forums.cnet.com/7723-7811_102-108963.html - Cached
7.
Videos for timing chain problems
sr20 timing chain problem
10 sec - Jun 22, 2009
Uploaded by natedrake88
youtube.com

CHEVY ENGINE REBUILD CAMSHAFT TIMING CHAIN ...
5 min - Feb 21, 2008
Uploaded by ronieboy44
youtube.com
8.
What causes timing chain problems? - Yahoo! Answers
Apr 12, 2010 ... The timing chain "stretches" over time and the gears they ride against wear down, causing slack in the chain and causing the base timing at the ...
answers.yahoo.com › ... › Cars & Transportation › Maintenance & Repairs - Cached
52 plate Vauxhall Vectra C Sri 2.2 timing chain problem?‎ - Sep 20, 2009
1997 Ford Explorer Rear Timing Chain Tensioner Problems ...‎ - May 1, 2009
95 S10 timing chain problem?‎ - Sep 11, 2008

More results from answers.yahoo.com »
Get more discussion results
9.
Timing Chain Slack Test
There is a very simple check for a loose timing chain due to a broken tensioner, worn gears, ... A compression test will also reveal timing problems. ...
www.misterfixit.com/chanslop.htm - Cached - Similar
10.
Signs of Timing Belt Problems | eHow.com
Signs of Timing Belt Problems. Timing belt breakage is one of the most common causes of cars breaking down. By having an idea of what a timing belt is and ...
www.ehow.com › ... › Replace Honda Timing Belts - Cached - Similar

Searches related to timing chain problems

nissan altima timing chain problems

ford explorer timing chain problems

timing belt problems

timing chain replacement

timing chain change

honda element timing chain

engine timing belt

bmw 740 timing belt


****

Of course, as we can see, there are timing belt 'problems' to consider as well.......

Oh, and uh, let's try and determine how many have ****ty parts problems from Aisin or some other partially Toyota owned subsidiary besides the owner and lube product generated problems.

Worth noting, in the first one hundred search items ( ten pages x ten listings) outside of GMI the 3.6 is mentioned once - by one of our very own but on another forum board in the as expected 'stir the pot' fashion.
 
1 - 20 of 78 Posts
Top