Better quality O/E CATs seem to be worth it.

It's often mentioned on these very forums that the CAT's on MGF's don;t seem to do very well in the emissions test for the MOT after a year of two. Now I am assuming here that these are often aftermarkets ones like those from Bosal and Klarius and even othr unnamed brands.



In fact I fitted a Klarius new CAT to "Elsie" for her MOT last September and whilst she passed the CO level was 0.13% and she also had a brand new Lambada sensor fitted.



This morning I took "Blue 33" for her retest after the remedial work was done yesterday which included a new O/S/F lower ball joint, changing the drop link for one on which the rubbers were not splitting apart and fitting a new O/E Cat.



She sailed through with none of the mucking about blocking one tail pipe. here are her readings:-



Fast Idle Test



CO = 0.00%

HC = 7 ppm

^ = 1.010



Natural Idle test



CO = 0.00%



We have two advisory Items :-



O/S/F tyre wearing on inner edge ...worn ball joint the cause



N/S/F drop link bushes deteriorated



When the weather improves a bit I will change the N/S one. Will get the aligment re-checked and adjusted if needed and start putting money aside for new tyres.



Last year "Blue 33" still had her original exhaust fitted and her readigns were:-



Fast Idle Test



CO = 0.05%

HC = 23 ppm

^ = 1.001



Natural Idle Test



CO =0.02%



And that was with a 17 years exhaust and CAT fitted. It would appear there is something to be said for O/E CAT's after all!



It will interesting to see how "Eslie" does on the emissions in September with the Klarius CAT fitted.

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