I have been reading the posts on timing chain failures on 07's. I am concerned since mine was built in March 07. Spoke to my service advisor who said he had not heard of this issue. I gave him the TSB and he was still clueless. There are many SRX's in this area.

Any VIN range or build dates been identified by GM?

Thanks!

I do not know if it is envitable. However, I have 07 6cyl AWD built in 08/06 with 14k. My timing chain was repaired today. It started as a sensor warning light and progressed. Dealer stated there are Cadillac bulletins in the topic.

I believe this a 6cyl AWD issue only based on other threads.

Hope this helps!

I do not know if it is envitable. However, I have 07 6cyl AWD built in 08/06 with 14k. My timing chain was repaired today. It started as a sensor warning light and progressed. Dealer stated there are Cadillac bulletins in the topic.

I believe this a 6cyl AWD issue only based on other threads.

Hope this helps!

Yes, there are bulletins, and if yours was in the range of the affected ones...it very likely is inevitable. Odd that your dealer hasn't heard of it yet (or claims not to), unless they just don't get many SRX's around in general, or specifically '07 V6's.

I read an article the other day on the WEB that talked about the timing chain issue.
It seems Cadillac changed the the pitch of the chain and sprokets in early '07 in order to make it quieter. The first new chains they received were improperly hardened; and that resulted in the problem with some of the engines that received that first shipment of chains. Probably not limited to just AWD vehicles, since the engines are the same as the the 2WD I assume. Probably some CTS cars affected also?
Does anyone know if the TSB includes VIN numbers? One would think that if they traced the chain problem source, they could match it to engine numbers, and then to VIN numbers?

DG

I read an article the other day on the WEB that talked about the timing chain issue.
It seems Cadillac changed the the pitch of the chain and sprokets in early '07 in order to make it quieter. The first new chains they received were improperly hardened; and that resulted in the problem with some of the engines that received that first shipment of chains. Probably not limited to just AWD vehicles, since the engines are the same as the the 2WD I assume. Probably some CTS cars affected also?
Does anyone know if the TSB includes VIN numbers? One would think that if they traced the chain problem source, they could match it to engine numbers, and then to VIN numbers?

DG

Have reviewed the GM bulletin on this issue but no Vin range or build dates were given. Anyone on this forum have this info?

I am a cadillac/GM technician and i cannot even count how many chains i have replaced even had a broken timing chain. It seems mostly srx has this problem although i have done a couple sts and cts. There are four different chain and gear designs and none of them work. ive replaced chains from 04-07 and mileage from 2000 to 45,000. and either way the pitch of the sprockets...the engine is just too damn noisy and aluminum just amplifies it

I purchased a SRX 2007 with 4000 kms. registered last June. I just returned from Florida to Canada yesterday. About 500 miles from home the engine light went on. i continued driving, noticing that down shifting frequency had increased and RPM's were increased by about 3 - 400. I drove home and went to my dealer this morning to be informed the timing chain was gone and the vehicle should not be driven. This vehicle has 14000 miles registered now. I have been advised the repair will take about a week and they have given me a rental but: will the repair be permanent in that it won't occur again and what other problems could I expect. I really enjoy the vehicle and the gas mileage isn't all that bad for what we're driving. GM could improve the rpm/shift ratio asat 25 MPH I'm turning 1800 RPMs and at 60 MPH,I'm turning 1800 RPMs. Any thoughta folks?

Drop over to the shifting explanation thread and have a look at the discussion there.

Subject: LP1, LY7 MIL/DTCs P0008, P0009, P0016, P0017, P0018 or P0019 (Replace Primary Drive and Both Secondary Drive Timing Chains)


Models: 2007 Buick LaCrosse/Allure

2007 Cadillac CTS, SRX, STS

with 2.8L HFV6 or 3.6L HFV6 Engine (VINs T, 7 -- RPOs LP1, LY7)




--------------------------------------------------------------------------------

This bulletin is being revised to update the Parts Information. Please discard Corporate Bulletin Number 07-06-01-013 (Section 06 -- Engine/Propulsion System).


--------------------------------------------------------------------------------

Condition
Some customers may comment on the Malfunction Indicator Lamp (MIL) being illuminated. Technicians may find the following Diagnostic Trouble Codes (DTCs) stored:

• DTC P0008 : Engine Position System Performance Bank 1

• DTC P0009 : Engine Position System Performance Bank 2

• DTC P0016 : Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation Bank 1

• DTC P0017: Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation Bank 1

• DTC P0018 : Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation Bank 2

• DTC P0019 : Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation Bank 2

Cause
This condition may be caused by stretched primary drive and both secondary drive timing chains.

Correction
Refer to SI for the follow diagnostic information if only one of the following DTCs are set:

• DTC P0008

• DTC P0009

• DTC P0016

• DTC P0017

• DTC P0018

• DTC P0019

If there are more than one of the above mention DTCs set, inspect for stretched timing chains. Refer to Camshaft Timing Drive Components Cleaning and Inspection (Fourth Design) in SI.





The above illustration shows the 3rd design roller type chain (1) (for model years 2005-2006 -- LY7) and the 4th design link type chain (2) (for model year 2007 -- LY7).

It may take several thousand miles/kilometers of use before the timing chains begin to stretch. Inspect both the primary drive and both secondary drive timing chains for the following:

• Binding links

• Loose links

• Loose pins

If any of the chains are stretched, replace the primary drive and both secondary drive timing chains only. DO NOT replace any of the other timing chain component parts.

Parts Information
Important: When ordering the timing chains, please be sure to also order all appropriate gaskets and seals needed to perform the repair properly.

Part Number
Description
Qty

12599718
Timing Chain, Primary
1

12599716
Timing Chain, Secondary
2



Logan Diagnostic LLC
www.ledfix.com
www.airbagcrash.com
www.logandieselusa.com

Greetings from the snowy north. I got my SRX back from the dealer today after one week in the shop. Two timing chains were replaced as well as some service work. All the while I was given a Gran Prix to drive. This is twice within 4 months this vehicle has been down for repairs of one week. Any other people experiencing the same type of problems. Timing chain and an incessant rattle in the roof somewhere. Anyway, those seem to be fixed now. Does anyone know if you can turn the radio off and just leave the nav system working and if so, how do you do it? So far, if I turn the radio off, everything goes off and if I just turn it down so you can't hear anything, everything is very warm. Thanks folks, look forward to your replies.

wow.. a week to get timing chains fixed.. you are one lucky dude... I know of 3 07 srx in ontario that have/were down for a month to fix this issue...Congrats

Interesting that they would go to all the work of replacing the faulty chains, and leave the old sprockets in place. Anytime a chain stretches, the link pitch increases, and puts a huge load on the sprocket teeth.
Basically, a new chain/sprocket distributes the tension load over several teeth as the chain leaves the sprocket. A badly stretched chain puts 100% of the load on the last tooth as it leaves the sprocket, causing the sprocket teeth to wear prematurely on the trailing edge.
So, now we have a nice new chain on poorly-matching worn sprockets.
Result: increased noise, and reduced life of both components.
Who knows, probably it will do okay for 50k miles or more, maybe not.
Hmmm, what's the GM warranty again?

Sorry to be so cynical, but it seems to be poor customer support for a $50k car that the customer expects to go well beyond the warranty period with no engine issues.

DG

Had the SRX serviced yesterday for the safety recall. I asked the service advisor and the service manager about the timing chain issue. Both said they have not yet had one in for this repair and according to them they have sold 500 07 SRX's. ???

Had the SRX serviced yesterday for the safety recall. I asked the service advisor and the service manager about the timing chain issue. Both said they have not yet had one in for this repair and according to them they have sold 500 07 SRX's. ???
yeah..right. Like the parachute repacking service that boasts it's never had a complaint from a customer that the chute didn't open. :canttalk:

Had the SRX serviced yesterday for the safety recall. I asked the service advisor and the service manager about the timing chain issue. Both said they have not yet had one in for this repair and according to them they have sold 500 07 SRX's. ???If this is true, is it possible that ambient temperature has something to do with the chain failure? What is the lowest temperature that will occur in Port Charlotte, FL? Would be interesting to know the % of failures in the colder climes compared to the areas that never see freezing temps let alone zero and lower.

If this is true, is it possible that ambient temperature has something to do with the chain failure? What is the lowest temperature that will occur in Port Charlotte, FL? Would be interesting to know the % of failures in the colder climes compared to the areas that never see freezing temps let alone zero and lower.

Temps here in winter occasionally hit in the 40's, and summers can be quite warm. I would guess the average yearly temp is in the low 80's.

Hmm, that one dealer sells 500 SRX's a year? How many sold worldwide in 2007 - maybe 12,000? How many dealers in the world sell SRX's - maybe 2,000? Man, he's doing something right, better trust everything he says - Ha!

DG

Hmm, that one dealer sells 500 SRX's a year? How many sold worldwide in 2007 - maybe 12,000? How many dealers in the world sell SRX's - maybe 2,000? Man, he's doing something right, better trust everything he says - Ha!

DG

I know it sounds incredible, but my salesman also stated that the dealership has just recently passed 2000 sales of the SRX since it was brought to market on 04. This is a high volume dealer in a well to do area. He usually has 30 -40 on the lot at any time.