1993 Pontiac Grand Am Catalytic Converter/Head Gasket

Tiny
SHELLBELL858
  • MEMBER
  • 1993 PONTIAC GRAND AM
1993 Pontiac Grand Am Automatic 130000 miles

On Dec. 4th I took my car to be smogged and it failed, the CO2 was too high. He said as I left there's a leak in the heater. When I got in car, there was condensation inside my windsheild. Driving home it overheated, starting smoking and smelled funny. I pulled over and had it towed to repair shop. The fixed the heater core and recommended another place for the smog repairs. For a week it drove fine, took it to smog repair and they replaced my catalytic converter, ran a pre-smog test and it passed. The next day, I took it back to smog shop and it failed, this time the NI or NO, I can't remember but it wasn't the CO2 again. Anyway, yesterday two weeks after it overheated and was repaired, it almost died idling, when I accelerated it knocked slowed and then at full speed it was fine. Every time I slowed down it would idle down and almost die. It didn't overheat or have any other symptoms. I had it towed back to the repair shop that put in the catalytic converter and now they are saying it's a blown head gasket. Is it possible for the head gasket to blow two weeks after overheating? Is it possible something wrong with the catalytic converter installation?
Thursday, December 18th, 2008 AT 10:40 AM

1 Reply

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Ok it could be a head gasket or a cracked head. How did they determine it was a head problem? Did they do the co2 test from the radiator? If it is a head do not have the work done without getting the head pressure tested. It costs a bit more but the 45 dollars or so is well worth it. You don't want to find out after the head it back on that it was a crack in the head, now you get to pay the labor over again. Also have the head checked for worping to. If you need anything else just ask. Thanks and have a great day.
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Thursday, December 18th, 2008 AT 10:50 AM

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