3L TDI / CATA / CNRB - VCDS chain stretch

22880 Views 224 Replies 44 Participants Last post by SaVAGeSoot, 3 d ago

SaVAGeSoot

Discussion Starter · Apr 22, 2022 (Edited)

This post might just break this forum, as just about anyone I've ever met with a 3L TDI wants some sort of ability to check the potential doom of their timing chain skipping.

Edit:
Since there aren't too many users reporting values at the moment, I will keep updating the table for now to provide an easy to read reference.

User Engine Odometer (k) Adaptation (º) START Rattle (Y/N) OCI (k)
SaVAGeSoot CNRB 93 -4.15 N 10
buckwheat CNRB 119 -4.7 Y 10, 6.7
ToolmanJohn CNRB 117 -3.82 N 10
ATSTodd CNRB 159 -4.92 N 10
Suprolla CATA 152 -1.5 N 7.5
DashParr CNRB 209 -2.97 ? ?
josiah47 CATA 120 -2.3 N 10
ValveCoverGasket CATA 126 -2.07 N 10
Tyler Scalzo CNRB 102 -2.9 ? 7.5
maintenance247 CNRB 119 -2.59 N 7.5
yeti007 CVVA 59 -3.86 N 8.5
Brendanm CRCA 198 -4.6 Y 10
iSagen CASA 109 -1.85 N 10
VaNSqL CATA 135 -0.86 N 6.2
Goldsburg CNRB 137 -5.0 Y 5
werdna CNRB 127 -3.8 N 5
alfissimo CNRB 83 -4.48 N ?
renjean1 CNRB 157 -4.83 ? ?
Lance_1 CNRB 230 -5.16 Y ~10
20bugsys CATA 104 -4.15 Y ?
mickblouin84 CNRB 186 -15.1 N ?
DEZL_PWR CNRB 55 -1.6 N 10
Sceep CNRB 151 -5.12 N 10
Veloch CRCA 127 -3.8 Y 10
nicholaschase29 CNRB 145 -4.55 Y 10
buyingconstant7 CNRB 112 -1.21 N 6.2
keaton85 CNRB 197 -4.55 Y ?
Thumper3 CNRB 99 -2.31 N 4.5
Merunrun CNRB 41 -2.6 N ?
jatan231 CRCA 107 -1.65 Y ?
Dannyboy485 CNRB 130 -2.29 N 10
buyingconstant7 CNRB 180 -3.96 ? 10
drjonez CATA 160 -2.22 Y 10
Weekev CRCA 75 -1.5 Y 6.2

The following information is what I've learned from reading way too many posts on the subject.

I strongly suggest that anyone with the ability to post their own details contributes to this so that we can come up with some consensus of potential feasibility.

Here are my values.
CNRB with ~150k (km)
I don't have any noticeable rattle or noise concerns.
You want your engine ~~warmish~~ fully warmed up before taking the reading.

Address 01: Engine (7P0 907 401 K)

19:10:21
IDE00021 Engine RPM 713 /min
IDE00025 Coolant temperature 61º C
IDE00182 Camshaft adaptation intake bank 1: phase position -4.15º
IDE00196 Engine oil temperature 59.1º C

You're interested in the adaptation value. Ideally, it's zero, but as your chains wear, they will get noisy and once you get around -8 to -9 you can expect a failure. At that point you should have a significant amount of rattle, especially on cold startups.

People with short OCIs and quiet chains report being around the -5 value at about 100-120k miles.

Post your details and let's see if there's any truth to these rumors!

User	Engine	Odometer (k)	Adaptation (º)	START Rattle (Y/N)	OCI (k)
SaVAGeSoot	CNRB	93	-4.15	N	10
buckwheat	CNRB	119	-4.7	Y	10, 6.7
ToolmanJohn	CNRB	117	-3.82	N	10
ATSTodd	CNRB	159	-4.92	N	10
Suprolla	CATA	152	-1.5	N	7.5
DashParr	CNRB	209	-2.97	?	?
josiah47	CATA	120	-2.3	N	10
ValveCoverGasket	CATA	126	-2.07	N	10
Tyler Scalzo	CNRB	102	-2.9	?	7.5
maintenance247	CNRB	119	-2.59	N	7.5
yeti007	CVVA	59	-3.86	N	8.5
Brendanm	CRCA	198	-4.6	Y	10
iSagen	CASA	109	-1.85	N	10
VaNSqL	CATA	135	-0.86	N	6.2
Goldsburg	CNRB	137	-5.0	Y	5
werdna	CNRB	127	-3.8	N	5
alfissimo	CNRB	83	-4.48	N	?
renjean1	CNRB	157	-4.83	?	?
Lance_1	CNRB	230	-5.16	Y	~10
20bugsys	CATA	104	-4.15	Y	?
mickblouin84	CNRB	186	-15.1	N	?
DEZL_PWR	CNRB	55	-1.6	N	10
Sceep	CNRB	151	-5.12	N	10
Veloch	CRCA	127	-3.8	Y	10
nicholaschase29	CNRB	145	-4.55	Y	10
buyingconstant7	CNRB	112	-1.21	N	6.2
keaton85	CNRB	197	-4.55	Y	?
Thumper3	CNRB	99	-2.31	N	4.5
Merunrun	CNRB	41	-2.6	N	?
jatan231	CRCA	107	-1.65	Y	?
Dannyboy485	CNRB	130	-2.29	N	10
buyingconstant7	CNRB	180	-3.96	?	10
drjonez	CATA	160	-2.22	Y	10
Weekev	CRCA	75	-1.5	Y	6.2

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