Bigruu1

Can anyone help me find the torque specs for the front catalytic converter on a 2001 Maxima (GLE)? I need to replace mine.

Thanks for any help.

Rudy

DennisMik

iTrader: (2)

The bolts connecting to the Y-pipe are 45 to 51 foot pounds.
The bolts connecting to the exhaust manifold are 22 to 25 foot pounds

Bigruu1

Thank you, Dennis, I really appreciate it.

The manifold torque specs are much lower than the Y-pipe one. Do you know why that is?

Thank you.

Rudy

DennisMik

iTrader: (2)

I'm not really sure but I think it is because of the materials involved. The exhaust manifold is cast iron and the cat flange is steel. Cast iron is not as strong, so you can't put as much pressure on it. The bolts holding the exhaust manifold on to the cylinder head are also 22 to 25 foot pounds.

Bigruu1

Dear Dennis,

Thanks again for your valuable help.

Your analysis makes complete sense, cast iron is much more brittle but can withstand the heat. Now I understand the difference in the torque specifications. Thanks again, you're a great resource.

Respectfully,
Rudy