Hiflow (unflanged) 3inch Cat Do I Need The Temperature Sensor Bung?

[some_cs_student]

Hi,

I got a 3inch highflow cat with no flanges from a seller off the forum, I spent most of the morning ringing exhaust shops to get flanges fitted, quotes were $70 to $100.

I found one for $50.

When I got there he said he had only one 3 inch flange and that he could use the flanges off the compliance cat, so I let him use them.

However he said he couldn't fit the temperature bung because I had to have the part for him, probably from Nissan.

What does the temperature bung do on the cat? Do I need it?

And where can I get it from in South Eastern suburbs, Victoria?

Regards,

Gareth

[GeeTR]

Temp sensor, ignore it.

http://www.skylinesaustralia.com/forums/Qu...05808.html&

http://www.skylinesaustralia.com/forums/in...t&p=3628181

http://www.skylinesaustralia.com/forums/Da...;p=3557585&

http://www.skylinesaustralia.com/forums/Da...p=3556598&h

Edited March 8, 2008 by GeeTR

[some_cs_student]

Temp sensor, ignore it.

So leave it hanging there so to speak? (I'll tie it up to something but it just won't be in the cat .

From a quick read of the threads (searched for cat temperature bung and found nothing) its just used to warn you when the air in the cat is too hot?

Thanks for your help as always

Regards,

Gareth

[GeeTR]

Correct, the surface area increasing matrix inside the cat (be it normal ceramic or metal) has a coating that provides a multi stage chemical converting process.

The process creates more heat after the cat then before (why road side RTA can use laser temp guns to make sure you cat hasn't been "gutted"

The sensor will trigger a lamp on the dash if it rises above a preset. This indicates either to lean mixtures at cruise (hot chamber mixtures), way too rich, and the fuel is burning in the dump pipe, or a blocked cat.

So tie it somewhere, or just cut it off and remove lamp bulb in the dash.

Glad to help

Reading material if your interested

Edited March 8, 2008 by GeeTR

[some_cs_student]

Thanks but to make things harder, the person who removed the flanges added some of the old cat to the new cat.

Its now about 3cm too long to even fit in!

So now I can't drive the car until Tuesday while I wait for this guy to get back to work, and I have to take time off work so he can fix it.

[GeeTR]

Nooob

[Munkyb0y]

When I got there he said he had only one 3 inch flange and that he could use the flanges off the compliance cat, so I let him use them.

your compliance flanges are probably smaller than 3 inch, most likely 2.25inch, which means you have created a restriction that shouldnt be there.

this exhaust place sounds dodgy.

[some_cs_student]

your compliance flanges are probably smaller than 3 inch, most likely 2.25inch, which means you have created a restriction that shouldnt be there.

this exhaust place sounds dodgy.

Well I have a 3 inch exhaust so they probably put some larger flanges on to attach to the exhaust

The exhaust place I went to was VERY dodgy. The welds were also low quality so I'm hoping to get it properly done now.

The "bad" side does not even have a square weld on it.

Its going to have to be cut and re-welded (properly) on one side.

[some_cs_student]

So tie it somewhere, or just cut it off and remove lamp bulb in the dash.

Reading material if your interested

I might have a quick read of that material later .

In regard to the bulb in the dash why remove it?

I mean if I have the sensor tucked away, then its not going to get really hot and go off is it?

And if it does which light informs you that the cat is too hot?

Or is it just a function of the power FC?

Regards,

Gareth

[GeeTR]

Yah, ud think u can tie it up and it'd be ok...

Many are rusted solid in the cat though

Your 33 should use the engine check light an indicator.