Ticking sound while cold

seahawkdodge

Well-known member
Joined
Mar 8, 2020
Location
FL
TDI
2013 Passat TDI
2013 Passat, 112k miles.
When the engine is cold, there is a very pronounced ticking noise while driving. It is much louder than the normal lifter noise, and louder than the initial ticking that lasts about 5 seconds after startup.
It is most noticable in the lower RPMs, 1000 - 3000rpm, under part throttle. It will do this all the way until the engine temperature gauge hits 190.
When the engine is at normal operating temperature, it is not present.

I started noticing this a few months ago. The dealership just changed the head gasket and timing belt, and it didn't change.

I would say it is progressively getting worse as time goes on.

I can try and get a recording of the sound.

Any ideas what this might be?
 

seahawkdodge

Well-known member
Joined
Mar 8, 2020
Location
FL
TDI
2013 Passat TDI
You don't really hear it at idle. It only seems to be there under load.
 

pedroYUL

Veteran Member
Joined
Sep 8, 2011
Location
MI, USA
TDI
2015 Passat CVCA; 2015 GSW CRUA; 2012 wagon CJAA; 2004 wagon BEW
Which engine oil are you using?
 

AverageAndy

Veteran Member
Joined
Sep 14, 2020
Location
Phoenix, AZ
TDI
2013 Passat TDI SEL, 2013 Golf TDI 6MT, 2013 Jetta TDI 6MT (R.I.P.)
I've had to replace 2 injectors, at separate times. Both times symptoms were cold weather cold engine related, starting slowly then getting progressively worse over a few months. Noticeable ticking noises (more pronounced but similar to yours), usually around 1500-1800 RPM. Symptoms progress to engine stumbling, bucking like the transmission is bad, then triggering a code (for me P1004 and later P1007). Codes may be intermittent and self-clear at times.

Maybe scan for any pending codes and if you see a P1004, P1005, P1006 or P1007, consider resetting that injector or preparing to replace it. For me personally, resetting didn't help, but my symptoms were much worse than yours sound. I think you can also check through VCDS for the actual torque difference in the cylinders and see if maybe one is slightly different from others, but still within normal parameters.
 

DivineChaos

Top Post Dawg
Joined
Jul 27, 2019
Location
Minnesota
TDI
mk6 jetta sportwagen tdi
While cold... Outside temp? Probably diesel knock. Mine has the old diesel knock for a bit when it's cold outside. It's a cylinder not igniting. Right. Almost sounds like either knock if your familiar.
 

seahawkdodge

Well-known member
Joined
Mar 8, 2020
Location
FL
TDI
2013 Passat TDI
I am using liquid moly oil, of the correct specifications.

It happens regardless of outside temperature, but before the engine is at operating temperature.

It didn't start happening until right after 100k miles. The dealership said they did a full reset of the injectors when they replaced the head gasket and turbo.
 

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis, MO
TDI
There are just too many to list....
It is called "nailing", and the CKRAs seem to do it a lot, fairly common. You can try resetting/re-entering the injector IDs, that sometimes helps. Some are worse than others. I notice it on more of them than not.
 

seahawkdodge

Well-known member
Joined
Mar 8, 2020
Location
FL
TDI
2013 Passat TDI
Thank you all for your input. I am going to see if the dealership will replace the injectors under warranty. I am pretty sure VW is ready for this warranty to expire.
 

jafische

Veteran Member
Joined
Dec 1, 2012
Location
Pace, FL
TDI
2013 (A3) TDI SEL Premium (Reflex Silver / Moonrock)
How do you reset injector IDs? Through VCDS?
I ask because mine is progressively getting clickier.
 

AverageAndy

Veteran Member
Joined
Sep 14, 2020
Location
Phoenix, AZ
TDI
2013 Passat TDI SEL, 2013 Golf TDI 6MT, 2013 Jetta TDI 6MT (R.I.P.)
Yes, through VCDS. If you follow these instructions for a new injector (see link below), but enter an implausible number, save it, then re-enter the original injector number, save it. This should reset your specific injector. The reset is injector specific, so if you want to reset all, you would have to do this 4 times. There may be an actual reset function button, but I am not sure if this does the same thing.


VCDS would also let you know if there is a pending code for an injector, such as P1004-1007, before any MIL light shows up. If no pending codes, you can see the pressure/torque values of each cylinder and possibly identify an outlier.
 

jjblbi

Veteran Member
Joined
Sep 27, 2000
Location
lbi, nj
TDI
2014 Passat SEL TDI
I had the same issue recently which worsened as the temps got colder, eventually threw the P1007 code. I changed the fuel filter (it was due - 240k service) topping off canister with PowerService and used 1/2 bottle of Chevron 266373272 Techron D Concentrate Diesel Fuel System Cleaner, 20 fl. oz. for my next two tanks. I was ready to replace my injectors and thought I'd give it a try. At ~$50 vs. $500 it was worth a shot for me and worked. I have 241k miles now. Good luck, John
 

Deejontdi

Member
Joined
Feb 3, 2024
Location
Kentucky
TDI
2012 Passat SEL
Thank you all for your input. I am going to see if the dealership will replace the injectors under warranty. I am pretty sure VW is ready for this warranty to expire.
Any update on what fixed this for you I’m having the SAME EXCACT sound and experience right now. Thanks in advance!
 
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