Cat Rattle

[Justin S]

My Westfield , which I built, has a cat rattle after just 3 k miles . I took the silencer off last night and saw the cat internally move. Now. reason for the thread is to find reasons for this to fail at only 3k miles. The engine is a Honda F20c , which is standard . The ecu and map was a locked from the factory . Is there a fix or is it a case of cutting it out and replacing ? Just looking for ideas on whats best to do and no, I dont want it to be decatted, as I need it for an MOT next year.

[GreenV8S]

Has it encountered standing water, or heavy rain directly onto it? Thermal shock has been known to damage the outer layer of the matrix.

[Justin S]

GreenV8S said:

Has it encountered standing water, or heavy rain directly onto it? Thermal shock has been known to damage the outer layer of the matrix.

It is external to the car and it can get water on it , but not standing water . It is in line with the front wheel, which is something I cant change.It is a road car, so not been hammered over track rumble strips, but it has been driven in Oxfordshire . It has been rattling for the last 500 miles and is currently only noticeable at low idle revs , especially reversing, but suspect it will get worse. The honeycomb looks perfect when I looked at it last night, so not broken up.

[E-bmw]

Where was the cat from?

Is it a good make?

i have heard anecdotal evidence of cheapies doing exactly this, especially the ceramic honeycomb type.

[Justin S]

E-bmw said:

Where was the cat from?

Is it a good make?

i have heard anecdotal evidence of cheapies doing exactly this, especially the ceramic honeycomb type.

Full system was from Westfield as part of the kit.
Not exactly cheap
https://parts.westfield-sportscars.co.uk/engine-dr...

[paintman]

What have Westfield said about it?

[Justin S]

paintman said:

What have Westfield said about it?

The guy I need to speak to is away, but they will probably say its not a warranty as I bought it 2 years ago , although only on the road for 18 months and the mileage as is. The company Motad that made them went bust.

[stevieturbo]

Justin S said:

Full system was from Westfield as part of the kit.
Not exactly cheap
https://parts.westfield-sportscars.co.uk/engine-dr...

Jesus...nearly £800 for that ???

Pics arent superb...but quality of construction doesnt really look to justify the price.

[Justin S]

stevieturbo said:

Justin S said:

Full system was from Westfield as part of the kit.
Not exactly cheap
https://parts.westfield-sportscars.co.uk/engine-dr...

Jesus...nearly £800 for that ???

Pics arent superb...but quality of construction doesnt really look to justify the price.

Dont forget you need the manifold and a silencer too, so like I said, not really cheap. Thinking of options currently. Have a guy who fabricates exhausts in Newbury , so may ask what decent cat of 2 1/2 inch pipe I need and to fit it , or just live with a disintegrating cat until MOT a year November, at which case it may be missing and repair it then.

Edited by Justin S on Thursday 28th June 17:41

[stevieturbo]

Shouldnt take much to cut that cat out and weld a new one in

https://profusionexhausts.com/catalytic-converters...

[Justin S]

Thanks Stevie, thats spot on. I will contact them about getting a cat and get it tigg'd in. The system from Westfield is really poor for the money and welding has been done by Stevie Wonder with hiccups. If I knew what I do now, I would have gone and got a custom done.

[stevieturbo]

Justin S said:

Thanks Stevie, thats spot on. I will contact them about getting a cat and get it tigg'd in. The system from Westfield is really poor for the money and welding has been done by Stevie Wonder with hiccups. If I knew what I do now, I would have gone and got a custom done.

It doesnt need TIG'd, especially when your existing one just looks MIG'd

[Kccv23highliftcam]

stevieturbo said:

Shouldnt take much to cut that cat out and weld a new one in

https://profusionexhausts.com/catalytic-converters...

One has to say that is a rather handy site to know about!!