richard said:
so is the blanking plate part number (24575592)posted on here the same for astra and vectra then?
it's the same for all z22se engines
SteveW said:
The only thing that's worrying me about removing the EGR Valve completely is the fact that the EGR system helps reduce combustion chamber temperatures. The main reason for this I believe is to reduce the amount of Nox that the engine produces at cruising speeds.
But another thing it can do is help prevent pre-ignition and pinking. Now I'm worrying about that notsure.gif
I can't see how it would lower combustion temperature, surely it's better to have cold air going into the engine rather than hot exhaust gases, which must raise the intake temperature notsure.gif
The lower Nox at cruising speed is the only plus point, everthing else is negative dunno..
also it depends how you drive, if you drive using full revs the egr will be off anyway.
plus the engine is fitted with a knock sensor, this controls pinking via the ecu and mixture lambda
