XJ8/XK8 4.2 catalytic converter failure
Discussion
Has anyone had a catalytic converter failure on a 4.2 XK or XJ? Somoone ran into the back of my car a couple of months ago and since then it hasn't been starting properly - it takes a bit of cranking before it fires, but then runs perfectly.
A diagnostic check shows there is a fault with the cat and gives possible causes as melting or fracture so it seems quite likely to me that the bump, which could easily have hit the end of the exhaust caused a fracture in the cat. Trouble is, my insurance company are saying that it is not related and a cat is a wear and tear item with a 10 year life so as my car is nearly 10 years old there is no link between the accident and the failure. They have had an independent engineer out to look at it and he said that because he has seen cars with more damage at the rear not need a cat he can't see a connection.
Judging by the stock levels held by Jaguar and the lack of any alternative supplier of cats for the car I am guessing that they aren't selling like hot cakes so may not be many failing at 10 years old, but it would be good to have confirmation from any experience anyone has.
Failing that, anyone know of an independent engineer, preferably in Yorkshire, who might give me advice rather than having to refer to the one paid for by my insurance company.
A diagnostic check shows there is a fault with the cat and gives possible causes as melting or fracture so it seems quite likely to me that the bump, which could easily have hit the end of the exhaust caused a fracture in the cat. Trouble is, my insurance company are saying that it is not related and a cat is a wear and tear item with a 10 year life so as my car is nearly 10 years old there is no link between the accident and the failure. They have had an independent engineer out to look at it and he said that because he has seen cars with more damage at the rear not need a cat he can't see a connection.
Judging by the stock levels held by Jaguar and the lack of any alternative supplier of cats for the car I am guessing that they aren't selling like hot cakes so may not be many failing at 10 years old, but it would be good to have confirmation from any experience anyone has.
Failing that, anyone know of an independent engineer, preferably in Yorkshire, who might give me advice rather than having to refer to the one paid for by my insurance company.
andyps said:
Has anyone had a catalytic converter failure on a 4.2 XK or XJ? Somoone ran into the back of my car a couple of months ago and since then it hasn't been starting properly - it takes a bit of cranking before it fires, but then runs perfectly.
A diagnostic check shows there is a fault with the cat and gives possible causes as melting or fracture so it seems quite likely to me that the bump, which could easily have hit the end of the exhaust caused a fracture in the cat. Trouble is, my insurance company are saying that it is not related and a cat is a wear and tear item with a 10 year life so as my car is nearly 10 years old there is no link between the accident and the failure. They have had an independent engineer out to look at it and he said that because he has seen cars with more damage at the rear not need a cat he can't see a connection.
Judging by the stock levels held by Jaguar and the lack of any alternative supplier of cats for the car I am guessing that they aren't selling like hot cakes so may not be many failing at 10 years old, but it would be good to have confirmation from any experience anyone has.
Failing that, anyone know of an independent engineer, preferably in Yorkshire, who might give me advice rather than having to refer to the one paid for by my insurance company.
Hi Andy, how the hell are you?A diagnostic check shows there is a fault with the cat and gives possible causes as melting or fracture so it seems quite likely to me that the bump, which could easily have hit the end of the exhaust caused a fracture in the cat. Trouble is, my insurance company are saying that it is not related and a cat is a wear and tear item with a 10 year life so as my car is nearly 10 years old there is no link between the accident and the failure. They have had an independent engineer out to look at it and he said that because he has seen cars with more damage at the rear not need a cat he can't see a connection.
Judging by the stock levels held by Jaguar and the lack of any alternative supplier of cats for the car I am guessing that they aren't selling like hot cakes so may not be many failing at 10 years old, but it would be good to have confirmation from any experience anyone has.
Failing that, anyone know of an independent engineer, preferably in Yorkshire, who might give me advice rather than having to refer to the one paid for by my insurance company.
The problem with these cats is that they are mounted at right angles to the line of the rest of the exhaust. They are made of cast material and solid mounted to the manifold. There is absolutely no flex in the whole exhaust system, so if you have a shunt from the rear the first thing that will get damaged is the cat, or cats, and sometimes even the manifold. This is due to the leverage on them and the fact that there is no flexible section on the exhaust.
I have replaced several over the years that have been damaged in this manner, even after a minor shunt. The problem is that it doesn't always show up right away, but there is a facility within the claims system to make allowances for latent faults. Don't let the insurance company tell you otherwise.
J
jith said:
Hi Andy, how the hell are you?
The problem with these cats is that they are mounted at right angles to the line of the rest of the exhaust. They are made of cast material and solid mounted to the manifold. There is absolutely no flex in the whole exhaust system, so if you have a shunt from the rear the first thing that will get damaged is the cat, or cats, and sometimes even the manifold. This is due to the leverage on them and the fact that there is no flexible section on the exhaust.
I have replaced several over the years that have been damaged in this manner, even after a minor shunt. The problem is that it doesn't always show up right away, but there is a facility within the claims system to make allowances for latent faults. Don't let the insurance company tell you otherwise.
J
I'm great thanks, hope you are too.The problem with these cats is that they are mounted at right angles to the line of the rest of the exhaust. They are made of cast material and solid mounted to the manifold. There is absolutely no flex in the whole exhaust system, so if you have a shunt from the rear the first thing that will get damaged is the cat, or cats, and sometimes even the manifold. This is due to the leverage on them and the fact that there is no flexible section on the exhaust.
I have replaced several over the years that have been damaged in this manner, even after a minor shunt. The problem is that it doesn't always show up right away, but there is a facility within the claims system to make allowances for latent faults. Don't let the insurance company tell you otherwise.
J
If you don't mind, I'll give you a call to discuss this!
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