I don't see any way to replace the back gasket on the 3.8l caravan, other than removing the intake from top of motor? Removing the windshield wiper assembly seems like a partial soloution for good access. Don't want to remove more than necessary.

 

You have to remove the upper intake manifold which involves removing the wiper module. Here is the removal proceedure.

REAR CYLINDER HEAD COVER

1. Disconnect negative cable from battery.
2. Remove Wiper Unit. Refer to WINDSHIELD WIPERS AND WASHERS for procedure.
3. Remove intake manifold upper plenum. Refer to this section for procedure.
4. Disconnect PCV hose from cylinder head cover.
5. Remove rear cylinder head cover bolts
6. Remove cylinder head cover and gasket

INTAKE MANIFOLD

REMOVAL

1. Remove windshield wiper module. Refer to WINDSHIELD WIPERS AND WASHERS for procedure.
2. Perform fuel system pressure release procedure (before attempting any repairs) Refer to FUEL SYSTEM for procedure.
3. Drain the cooling system - only if lower intake manifold is to be removed. Refer to COOLING SYSTEM for procedure.
4. Remove air inlet resonator to throttle body hose assembly.
5. Remove throttle cable. Refer to FUEL SYSTEM for procedure.
6. Remove wiring harness from throttle cable bracket.
7. Remove automatic idle speed (AIS) motor and throttle position sensor (TPS) wiring connectors from throttle body
8. Remove EGR transducer connector.
9. Remove vacuum hose harness from throttle body
10. Remove PCV and brake booster hoses from air intake plenum.
11. Disconnect MAP Sensor electrical connector
12. Remove EGR tube flange from intake plenum.
13. Remove vacuum harness connectors from intake plenum Remove cylinder head to intake plenum strut
14. Remove the engine mounted ground strap.
15. Remove the fuel hose quick connect fitting from the fuel line by using an open end wrench pushing in on the plastic ring located on the end of the fittings. Gently pull the fitting from the fuel line WARNING: WRAP A SHOP TOWEL AROUND HOSES TO CATCH ANY GASOLINE SPILLAGE DURING REMOVAL.
16. Remove direct ignition system (DIS) coils and generator bracket to intake manifold bolt
17. Remove bolts from generator to intake manifold bracket. Loosen top generator mounting bolt, and move bracket up so intake manifold can clear mounting studs
18. Remove intake manifold bolts and remove the manifold
19. Cover intake manifold with suitable cover when servicing