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Catalytic converter air tubes?

Tiny
DALLIS727
  • MEMBER
  • FORD F-250
I own a 1988 f250 automatic 2 wheel drive with a 351 V8. On the top of catalytic converter there are to 1 inch diameter air tubes. The one closest to the engine is plugged with a screw and the other has a metal pipe going from it back towards the motor. The pipe is broken at the top where the pipe and air tube connect. What is this pipe for? The break is jagged and corroded how do I repair this? Is there any heat resistant rubber tubing that can be used to clamp on?


Thank you
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Thursday, August 9th, 2007 AT 8:00 AM

1 Reply

Tiny
INDYUKE
  • MECHANIC
  • 416 POSTS
That's a fresh air pipe that runs from the air pump to the exhaust. There should also be a cross-over pipe at the rear of the heads. It's used to dilute the exhaust and supply oxygen to the cats to aid in burning unburnt hydrocarbons. Emissions stuff.
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Sunday, August 26th, 2007 AT 8:47 PM

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