I wouldn't sell it ...

Unusual in Polish realities, the customer decided to regenerate catalytic converters before selling. It is known, paying half a banana for a car, a person would like to use it relatively trouble-free and enjoy you can already dare to say  from a kind of investment. Unfortunately, it is common to meet dishonest sellers who, before selling, do just the opposite - cut out catalytic converters from cars and sell them. For the seller this is a negligible apparent profit and for the new owner a big problem. Freshly before the sale, they delete the P0420 catalytic converter efficiency error and the customer, going for a test drive, may not even be aware of the problem, because the error may only light up even after several hundred kilometers. This usually happens when the car is already sold after a few days of use. Then the seller explains that the car is used and the catalytic converter is not eternal and can break down at any time. Sometimes you can hear the resonance of an "empty can" after the catalytic converter has been cut out, and sometimes it is difficult to determine this clearly, so the best way before buying is to check the composition of the exhaust gas at a diagnostic station. Nevertheless, in this case, the seller behaved as expected and decided not to give the future owner any surprises.

This interesting car is a 400 horsepower 3.8 liter Porsche 911 Carrera S from 2013 with 111 thousand kilometers.

As you can see in the photos below, the catalytic converters were very badly damaged despite the relatively low mileage. To my eye, this could have been the result  sudden cooling of the red-hot catalytic converters. This sometimes happens after driving into a larger puddle, you can also treat the hot engine with a karcher which will have an even better effect   As a result of the sudden stress created from the sudden cooling of the heated catalytic converters, the ceramic catalytic converter insert simply cracks over time leading to more damage as in this case. The only way out of this situation is to replace the inserts with new ones. Now we already put on metal ones, resistant to such adventures. Durable design with three centers with adequate capacity and emission standards. In this case, the vintage would suggest Euro 5 with a throughput of 500-600 cpsi. The emission standard is correct as far as possible, while the throughput in this case had to be selected at 300-400 cpsi because this is not an ordinary car but a sports car, and the catalytic converters that were installed here in series also originally had increased throughput. The choice fell on Euro 5 cartridges with a capacity of 400 cpsi, which was the closest to the original. The diameter of the cartridges is 130 mm and their length is 100 mm. These cartridges are available in our store on request at a price of 1845 PLN per piece.

After inserting the cartridges, we standard weld from the inside to ensure tightness and weld the whole thing together. Of course, using the tig method for proper aesthetics. In addition, we welded the rear sockets of lambda probes to fit the inserts of the appropriate length. Originally, in the sockets the ceramic insert was milled for the probe, while with a metal insert milling of the insert is not feasible. But it's not a problem as long as you don't move the sockets half a meter away and no longer have enough wire.

Customer satisfied and as far as I know a working car is still waiting for a new happy buyer ;-)

1. Before reconditioning

2. Dissecting the catalytic converter

3. After dissection

4. Matching the proper capacity

5. Matching the catalytic converter inserts

6. Welding the catalytic converter inserts

7. Welding the catalytic converter housing

8. Welding the lambda probe seats