Timing belt change coming up. I plan on doing the water pump by removing the rear belt cover. FSM mentions two gaskets for the rear timing belt cover - block interface. Do those need to be replaced? I've got all the other parts in waiting.

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HERS:'16 WK2 Limited EcoDiesel - GDE hot
HIS: '06 Liberty CRD - EHM , GDE eco, Brite Box, Stanadyne FM100, Cummins lift pump, OME lift
'06 Dodge/Cummins - Play truck; a couple of fans, a proper cam shaft, and man handled electrons by EFILive 500/900
'01 Dodge/Cummins - Work truck; Lots of mods

The gaskets behind the rear cover are more of a dust seal than anything else. One is paper and the others are a foam gasket.
You can sparingly use a bead of silicone to refresh the foam seals. And also to repair the paper gasket if you tear it.
Replace the gaskets the next time at 200,000 miles.

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TWO Identical 2005 Liberty Sport CRDS
#1 CRD, 174,000 miles. Eco tune, Samco hoses. Mobil1 0-40w used since day one
#2 CRD 143,000 miles. Bought used (unknown history) with 100,000 miles. Samco hoses.
Eco tune, new rockers, and 5 volt glow plugs installed at 124,000 miles

I guess I can use some ultra hi-temp RTV. That's what comes from the factory on the front gear case on my 06 Cummins. I've had that thing off twice and RTV works fine.

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HERS:'16 WK2 Limited EcoDiesel - GDE hot
HIS: '06 Liberty CRD - EHM , GDE eco, Brite Box, Stanadyne FM100, Cummins lift pump, OME lift
'06 Dodge/Cummins - Play truck; a couple of fans, a proper cam shaft, and man handled electrons by EFILive 500/900
'01 Dodge/Cummins - Work truck; Lots of mods