91 pontiac grand am cracked exhaust manifold - 1991 Pontiac Grand Am

Harvey N Tawatao

• 3854 Answers
• Posted on May 26, 2009

SOURCE: possible cracked manifold

Take it to a muffler shop, they work on exhaust problems all the time and may just need a new gasket from the collector flange which would not be that expansive. Almost all of them will inspect for free since there looking for your business.
I have not sean exhaust manifold go bad before the whole car or truck and the exhaust pipe is stainless so good chances are that it's the flange gasket or the bolts may have broke due to time and vibration.
Good luck and keep me posted.

SOURCE: o2 sensor location 1997 pontiac grand am 2.4 4 cyl auto trans

BANK 1 SENSOR 1 IS THE ONE IN THE EXHAUST MANIFOLD. BANK 2 SENSOR 2 IS BELOW THE CATALYTIC CONVERTER.

P0171 SHOULD GO AWAY WITH A GOOD O2 SENSOR BUT DO CHECK FOR VACUUM LEAKS TO BE SURE. 3.1/3.4L ENGINES HAVE A BAD DESIGN INTAKE MANIFOLD GASKET, THE LEAK OIL, COOLANT, AND AIR.

Ricardo Loranca

• 552 Answers
• Posted on Nov 10, 2011

SOURCE: i have a 96 pontiac grand am 2.4 l leaking coolant left side of vehicle corner of rear of engine under exhaust manifold can pressure test cooling looses very fast but cannot pinpoint leak

check your intake manifold and check the freeze plugs

SOURCE: exhaust manifold

A cracked exhaust manifold should not effect your motor unless you have an exhaust driven turbo or something depending on exhaust back pressure to be there. I know where I live you can not get a vehicle with exhaust leaks infront of the passengers compartment inspected though so you may want to have the leak fixed for passenger safety.