C4 exhaust question
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 800
Likes: 2
C4 exhaust question
I was putting the exhaust back under my '86 for the first time in several months. one of the mufflers is rusted on the backside, but i just want it on temporarily untill I can afford to replace them. Well while I have the exhaust off I gutted the main cat, as the county I'm in, in Ga has no emissions, yet. Anyways, back to the story just before the cat there was a hanger of sorts, had 2 bolts that bolts bottom half of hanger to top. Well, when putting the bottom half up against the pipe to bolt it onto the top half of hanger, neither of the bolt holes line up. I can move it a little and get one bolt in, but the other will never line up. It's kind of like the top half got bent while exhaust was off car, I had dual exhaust on it with no cats and found the car to be too loud so wanted to revert back. Now to the question, does that hanger have to be there? The exhaust seems to be very stable, it's doesn't move much at all.
Burning Brakes
Joined: May 2010
Posts: 840
Likes: 4
From: High Point NC
The thing that I would be concerned with is the stress that section is under from the engine/tranny moving around. I think without that hanger you might end up with leaks from around the cat.
Burning Brakes
Joined: Nov 2004
Posts: 897
Likes: 12
From: Land of Whiskey Rebels, PA
The answer to your question is YES. You certainly do need to use the bracket in front of the cat. It keeps the front Y-pipe and cat from moving side-to-side or up-and-down and banging against the floor tunnel. Without it, the only thing between the exhaust maniflold and the mufflers holding up the exhaust would be that thick rubber-band hanger. That hanger only prevents downward movement and not upward or side-to-side movement and is very "stretchy".
Frankly, I would replace BOTH exhaust hangers, especially the rubber band hanger. The hanger stretches and the holes tend to get elongated over time. The end result will be about 1/2 to 3/4 of an inch more road clearance.
Hope this helps.
Frankly, I would replace BOTH exhaust hangers, especially the rubber band hanger. The hanger stretches and the holes tend to get elongated over time. The end result will be about 1/2 to 3/4 of an inch more road clearance.
Hope this helps.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 800
Likes: 2
The answer to your question is YES. You certainly do need to use the bracket in front of the cat. It keeps the front Y-pipe and cat from moving side-to-side or up-and-down and banging against the floor tunnel. Without it, the only thing between the exhaust maniflold and the mufflers holding up the exhaust would be that thick rubber-band hanger. That hanger only prevents downward movement and not upward or side-to-side movement and is very "stretchy".
Frankly, I would replace BOTH exhaust hangers, especially the rubber band hanger. The hanger stretches and the holes tend to get elongated over time. The end result will be about 1/2 to 3/4 of an inch more road clearance.
Hope this helps.
Frankly, I would replace BOTH exhaust hangers, especially the rubber band hanger. The hanger stretches and the holes tend to get elongated over time. The end result will be about 1/2 to 3/4 of an inch more road clearance.
Hope this helps.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 800
Likes: 2
one more question, what is the easiest way to attach the air pipe to the manifold? I was out driving the car and had a horrible noise emit from under the hood. got back home because I was only like 2 mins from home and don't see anything messed up. After closer inspection I saw that the air pipe is vibrating on the manifold when the engine is under load.
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