I HAVE CONCLUDED I HAVE TWO PRE CATS

  • Tiny
  • Anonymous
  • 2006 NISSAN MAXIMA
  • 124,000 MILES

I have concluded I have two pre cats. Radiator side bank 1 and firewall side bank 2. I needed to know the easiest way to loosen the bolts. Pb spray or heating the bolts up. The one I am replacing is the one on the firewall.

Thursday, November 15th, 2012 AT 5:19 AM

1 Reply

  • Tiny
  • Mhpautos
  • EXPERT
  • 30,747 POSTS

Warm and give a good spray, use a good fitting single hex socket and a suitable lever, pull firm and even pressure and it should come loose. When it starts to move pull back and forward a little as this will help loosen any rust and keep the spray up as well.

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Thursday, November 15th, 2012 AT 8:40 AM

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