valve seat Citroen C4 2005 2.G Workshop Manual

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INJECTION
CHECKS: EXHAUST GASES RECYCLING CIRCUIT
Tool.
[1] Manual pressure-vacuum pump: FACOM DA 16
IMPERATIVE: Respect the safety and cleanliness requirements.
EGR valve.
Connect tool [1] on the capsule take-off (2).
Apply a vacuum of approx. 0,6 barseveral times to activate the rod «a».
In abruptly suppressing the vacuum, the valve should click and lock itself back on its seating.
Regulation electrovalve (EGR).
Check to be performed between the electrovalve (1)and the EGR valve (2).
Link the tool [1]in series, between the electrovalve (1)and the capsule (2).
Compare the values noted with those in the table below.
Engine speed (rpm) Vacuum value
780 0,5 bar
2500 0 bar
B1HP1K6D
Engines: 8HX - 8HZ
XSARA
Angl.-t2-page283-305-2005 9/01/06 10:18 Page 302

Downloaded from www.Manualslib.com manuals search engine 304
INJECTION
CHECKS: EXHAUST GASES RECYCLING CIRCUIT
Tool.
[1]Manual vacuum pump: FACOM DA 16
IMPERATIVE: Respect the safety and cleanliness requirements.
EGR valve.
Connect the tool [1]to the capsule union (1).
Apply, several times in succession, a vacuum of approx. 0.6 barto activate the rod "a".
In abrupt reaction to the vacuum, the valve should close on its seating with a clicking noise.
Exhaust gas reycling (EGR) electrovalve.
Check, not under load, between the electrovalve (2)and the EGR valve (1).
Connect the tool [1]between the electrovalve (2)and the capsule (1).
Compare readings with the values in the table below.
Engine speed (rpm) Vacuum value
780 0,5 bar
2500 0 bar
B1HP12GD
Engines: RHY - RHZ
XSARA PICASSO
Angl.-t2-page283-305-2005 9/01/06 10:18 Page 304