This bulletin applies to 2011-2012 Jeep Compass and Patriot vehicles equipped with a 2.4L engine and either the continuously variable transaxle or the continuously variable transaxle with off-road crawl ratio that exhibit a rattle and/or clatter sound during cold startup. The fix involves installing revised heater hoses, routing the purge solenoid wire harness and installing revised PCM software.

1. Replace the transmission shifter cable.

2. Remove the right wheel inner splash shield.

3. Position a clean collecting container under the draincock location.

4. Without removing the pressure cap and with the system not under pressure, turn the draincock counterclockwise to open.

5. The coolant reserve bottle should empty first. Then remove the pressure cap.

6. Allow the cooling system to drain completely.

7. Remove both supply and return heater core hoses.

8. Install new heater core supply hose P/N 05058822AB and heater core return hose P/N 05058823AB.

9. Install the right wheel inner splash shield.

10. Remove the engine cover.

11. To ensure that the purge solenoid wiring harness does not come into contact with the heater hoses, the wire harness will require a slight modification.

12. Loosely pull the purge solenoid wire harness straight and create a bend in the harness approximately 3/8-7/16 inch away from the harness retaining clip edge. This bend will also create a natural bend after the current spot tape on the harness. The apply 3-4 wraps of electrical tape, securing the bend to the harness.

13. Install the engine cover.

14. Fill the cooling system making sure that no air is trapped in the engine.

15. Reprogram the PCM with the latest software.

16. After PCM reprogramming, clear any DTCs.

17. Type the necessary information on the authorized modification label and attach it near the VECI label.

P/N                                PARTS NEEDED

05058822AB..................... heater core supply hose

05058823AB..................... heater core return hose

04275086AD..................... authorized modification label

68048953AB..................... engine coolant

68024433AC..................... shifter cable

Secured purge solenoid wire harness routed and taped.