147 JTDm 8v EGR Blanking plate - Alfa Romeo Forum
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147 JTDm 8v EGR Blanking plate

Hi yall , brought a part blanking plate from the bay the ones with a small hole in the middle and fitted it last weekend,I fitted it after the egr valve as apparently it can be fitted before the egr and after just before the intake on the 8v, maybe somebody can comment on this.The intake was mega coked up but after a little clean and digging it all looked good. I did notice a difference in the way the car drove , more smooth and it seemed a little better on pickup ,also the dreaded Motor control system failure light came up after one day of driving then went away after the weekend as it wasn't being driven ..strange... and hasn't come back.Worth the four quid imo.

Last edited by cree; 06-08-13 at 15:49.
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Im not sure whats recomended but when i tried on my 16v i put the orifice plate before the valve on the thinking that it is going to increase gas velocity throgh the hole and help keep particles in airflow and help prevent them sticking in the valve itself.
On the other side of the valve id assume it may hold back soot in airflow and make valve blockage worse.
Only theory as i never kept mine in long enough, and always only had approx 1mm of very fine soot build up inside the valve whenever removed for cleaning.
Only experiance can say which side is best.
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Quote:
Originally Posted by sussexa View Post
Im not sure whats recomended but when i tried on my 16v i put the orifice plate before the valve on the thinking that it is going to increase gas velocity throgh the hole and help keep particles in airflow and help prevent them sticking in the valve itself.
On the other side of the valve id assume it may hold back soot in airflow and make valve blockage worse.
Only theory as i never kept mine in long enough, and always only had approx 1mm of very fine soot build up inside the valve whenever removed for cleaning.
Only experiance can say which side is best.
You have a point
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Hi, the 8 valve engines have the same size inlet and outlet to the egr valve so it doesnt matter which you put it on but the 16 valve has an oval intake, the same as yours but a square outlet to the manifold.

The plates with holes allow just enough flow not to trigger the elm but if your egr system is coked up it might be further restricting it.
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