egr valve is under the air box at the top / back of the engine
it is a cilinder shape and is bolted on with 3 10mm bolts
and has a plug/leads attached to it! it is bolted to a cast alumium boy that is in turn attached to a stainless steel tube that runs the length of the back of the engine! if you take off the egr it will have only a single steel pin that pushs against a sring loaded valve in the aluminium casing!!! good luck
Peadar O'Dowd, February 2009