I would go with all that Paul has said , the EGR is a battle to get out 1st time around , there is a nasty little bracket at the back of the engine which really gets in the way ..
However, attracting a Allen key 6mm with a angle grinder , and looping of the end gives the required clearance to crack the bolts , i refitted those using a bolt which takes a 6mm head , adding loads of copper grease ...
You can see how much you need to remove in
photos
The last photo shows the nasty bracket , and how to gain access , I removed the air duct , and the vacuum hose from the fuel pump
You can also see how much tar had built up , and how much stuff Paul machines out with the modifications on the EGR
I have fitted the cleaned up EGR To the BHC tdi , and the modified to the ATL , I also removed a lot of the casting marks , and lumps and bumps inside the casing
Not had chance to drive the ATL yet ,but just cleaning up the one the BHC , feels like it got a further 5-10bhp , the ATL was clean to start off with so not sure what the results will be !
Time wise , 1st was a good couple of hours , 2nd time around , would say 2 hours tops
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