I am in the middle of "fix the been counter engineering" operation with my libby. I ordered water pump front half among other things from idparts.com. The water pump half came with a gasket (big o-ring) and a small o-ring. I figured that the big o-ring or gasket goes in the recess on the water pump half perimeter to form a seal between two halves. But I can't figure out where the smaller o-ring go? You can see both o-rings in the idparts product page. Does anyone have an adea?

Part page FYI: http://www.idparts.com/water-pump-brass ... -3612.html

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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover

I believe the smaller O-ring is the block seal for the back half if (for some reason) you remove the whole thing from the engine bay. I never use it.

Thanks. That makes sense.

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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover

I have dozens leftover here, free gaskets for anyone to pickup. Never use em.

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http://www.Colorado4Wheel.com
"Its not about what you can DO with your Jeep, its about where you can GO with your Jeep."
Knowledgeable - But Caustic

Yep, see 06 Parts Figure 7-230 PN 05159019AA pump to block "O" ring. If you don't have parts fiche and FSMs get copies from http://colorado4wheel.com/manuals/Jeep/KJ/

Parts manuals are often better than FSMs at showing how things go together.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

The FSM helps those who help themselves.

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http://www.Colorado4Wheel.com
"Its not about what you can DO with your Jeep, its about where you can GO with your Jeep."
Knowledgeable - But Caustic

Fair comment! I went through FSM but not the parts manual. I will refer both next time.

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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover