Engine - Rattle Noise After Start, No Start, MIL ON
15 12 01
July 23, 2012
2028302 *Supersedes T.B. V151104 dated December 22, 2011 to remove European exhaust warning light reference in text and add additional
model year applicability. *
Vehicle Information
Condition
Engine Rattling Noises after Start, Engine Doesn't Start, Timing Chain Slipped
Customer may state:
^ Rattling noises after engine start from front of the vehicle or engine compartment.
^ Engine does not start.
*^ MIL ON*
The following entries are logged in the engine control module (ECM):
Technical Background
Timing chain tension may be incorrect due to tensioner.
As a result, the timing chain can skip and causing contact between the pistons and valves.
Production Solution
Service
If timing chain is suspect, perform the following:
^ Complete the DTC entries according to guided fault finding (GFF).
^ Remove the lower timing chain cover, see Repair Manual Group 15 in ElsaWeb.
2019 Volkswagen Jetta GLI(1K2) L4-2.0L Turbo (CCTA) Volkswagen JETTA Page 25
^ Check the timing chain tensioner as follows:
^ Compress the tensioning rail of the timing chain (illustration 1, No. 2) by hand against the timing chain tensioner (Figure 1, No. 1).
If the piston of the timing chain tensioner cannot be compressed by hand after several attempts (Figure 3, green arrow), further engine diagnosis is
required.
Tip:
Inspect intake camshaft and camshaft bearing for damage.
If the piston of the timing chain tensioner can be compressed in by hand (Figure 2, red arrow) the timing chain tensioner has failed, and further
engine diagnosis may be required.
Tip:
If engine noises or no start condition remain, inspect pistons and valves for contact damage. If engine damage is noted, cylinder head or engine may
need to be replaced.
Warranty
Information only.
Required Parts and Tools
No Special Parts required.
No Special Tools required.
Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or removal.
Always check with your Parts Dept. and Repair Manuals for the latest information.
