Sorry late to the party. I own a 2016 T&C so I used my VIN to search TSB's this is the only mention of valvetrain noise FYI" Note - Links will not work as they are FCA Internal web-based
09 - Engine, 3.6L / Cylinder Head / LIFTER(S), Hydraulic / Diagnosis and Testing
DIAGNOSIS AND TESTING - HYDRAULIC LIFTER(S) NOISE DIAGNOSIS
Proper noise diagnosis is essential in locating the source of an NVH complaint. Locating a lash adjuster (tappet) type noise can sometimes be difficult. As a result, an initial misdiagnosis may occur.
Refer to the following chart for possible causes and correction of a lash adjuster (tappet) type noise.
(Refer to 09 - Engine/Cylinder Head/LIFTER(S) , Hydraulic - Removal).
(a) A collapsed lash adjuster(s) will remain in a compressed state with no external force and no return force from the spring. This is caused when debris jams the piston causing the top plunger of the lash adjuster to stay collapsed in the bottom housing. If the lash adjuster(s) are confirmed to be collapsed, replace the lash adjuster(s)
(b) A spongy lash adjuster(s) will return to its original state after being compressed. This is caused by air trapped in the lash adjuster(s)or debris blocking the check ball. The lash adjuster(s) will compress under a force and be returned to the original position under a spring force. If the lash adjuster(s) are confirmed to be spongy, repeat Step 2 as further run time may be required to de-aerate the lash adjuster(s). After repeating Step 2, see Steps 1, 4, 5, and 8.
4. Low oil pressure.
4. See below:
(a) Check and correct the engine oil level.
(b) Check the engine oil pressure
(Refer to 09 - Engine/Lubrication - Diagnosis and Testing) .
(c) Check for excessive main bearing clearance and correct
(Refer to 09 - Engine/Engine Block/BEARING(S) , Crankshaft - Standard Procedure).
(d) Check for a worn oil pump
(Refer to 09 - Engine/Lubrication/PUMP, Engine Oil - Inspection) .
Check the camshaft journals and the bearing bores for abnormal wear patterns, scoring, grooving, fatigue, pitting or a foreign material
(Refer to 09 - Engine/Cylinder Head/CAMSHAFT, Engine - Removal) .
5. A plugged oil restrictor in the oil passages to the cylinder head(s).
5. Check the cylinder head oil passages for blockage. Clean or replace as necessary.
6. Worn valve guide(s).
6. Measure the valve stem-to-guide clearance
(Refer to 09 - Engine/Cylinder Head/VALVES, Intake and Exhaust - Inspection) .
7. Rocker arm loose, adjuster stuck or at maximum extension and still leaves lash in the system.
7. See below:
(a) Check the camshaft journal and lobe for abnormal wear patterns, scoring, grooving, fatigue, pitting or a foreign material
(Refer to 09 - Engine/Cylinder Head/CAMSHAFT, Engine - Removal) .
(b) Check the rocker arm(s) for proper alignment to the camshaft lobe(s) and valve stem(s)
(Refer to 09 - Engine/Cylinder Head/ROCKER ARM, Valve/Removal) .
(c) Check the lash adjuster(s) for proper operation and replace as necessary
(Refer to 09 - Engine/Cylinder Head/LIFTER(S) , Hydraulic - Removal).
8. Air ingested into the engine oil due to a broken or cracked oil pump pickup tube.
8. Check the pickup tube and replace as necessary
(Refer to 09 - Engine/Lubrication/PICK-UP, Oil Pump - Removal) .
9. Faulty lash adjuster.
9. Replace the lash adjuster(s)
(Refer to 09 - Engine/Cylinder Head/LIFTER(S) , Hydraulic - Removal).
