I have seen so much on the problems with them. So what is it and what is it for? 3,100 miles and no Problems. Knock on wood.

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Now: "07 steel blue JK Rubicon 2dr
4.5" Rubicon Express lift
rolling on 35"x12.5" Xtreme MT's
Warn M8000 winch
On board Air
Ham radios
Skidrow and kilby skids

Former: '05 Patriot Blue CRD. Lifted, locked, and a few other toys.

Exhaust Gas Recirculation.

It is a emissions control part. Because the engine isn't 100% efficient, some unburnt fuel goes through the exhaust. The EGR valve takes some exhaust gas and introduces that into the intake, thus recirculating the exhaust gas. Part of the gas is then burned twice, decreasing the amount of unburnt fuel leaving the jeep.

WHile it sounds like it could increase efficiency (decreasing unburnt fuel), in actuality, it decreases efficiency...because you're introducing hot, dirty air into the induction charge of the engine.

Also, you're introducing all of the crap in the exhaust back into the engine, thus contaminating the oil faster.

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2005 Jeep Liberty CRD, Provent CCR, 2.5" lift

That explains it. Thanks for the info.

Jason

_________________
Now: "07 steel blue JK Rubicon 2dr
4.5" Rubicon Express lift
rolling on 35"x12.5" Xtreme MT's
Warn M8000 winch
On board Air
Ham radios
Skidrow and kilby skids

Former: '05 Patriot Blue CRD. Lifted, locked, and a few other toys.