Regarding the EGR, I see it as an enviromental "add on", rather than a crucial element in temperature or combustion control & I think the negative effects of a fubar EGR system would outweigh any (if there were any as far as the vehicle's efficiency etc) advantages that might be expected, especially when the air intake ends up looking like thisRhinoman wrote:Well strictly speaking the purpose of the EGR is to reduce NOx emissions however it does that by reducing combustion temperatures. I probably should have qualified my statement by saying its not a good idea to blank it off if your cooling system is marginal.
But as you say, if the cooling system is marginal, or doubtful in any way, that should be sorted asap anyway. Not sure if any/many people have succeeded in/bothered with reviving a duff egr system, or if it's even worth the bother.
Be interesting to see how much difference there is in intake temps before & after cleaning the standard intercooler & pipework, & maybe even with the egr blanked or left as is (working or not?), before looking at bigger intercoolers.Rhinoman wrote:You are correct that the intercooler is there to make the air more dense by reducing its temperature, the question is how much can be gained by a bigger intercooler? I think I should take some temperature measurements. First task is to find the engine, I looked under the bonnet but it was nowhere to be seen
If you can't find the engine, lift the AFT, the previous owner may have left it up in the roof?