How Long Does it Take to Patch an Exhaust System?
The good news is that it usually takes between 2-3 hours, so you won’t have to be without your car for too long. The drawback is you’re paying for that time. One of the reasons the labor costs tend to be high is the hours involved for even a relatively simple patch job. It all depends on how challenging it is to get to the exhaust manifold. That’s why labor costs can vary so much, even a couple of hundreds of dollars difference.
If your leak is in the manifold or very small, you’ll use the JB Weld. If the leak is downstream from the manifold, tape should work to fix the exhaust leak
How Long Does it Take to Replace an Exhaust System?
Naturally, this is a much more extensive, therefore expensive, process that will require a minimum of 2-3 hours of labor, potentially up to 8 hours. Moreover, this is a more comprehensive process, and you should check with your dealer or maintenance garage to know how severe the damage is and if you need a back-up form of transportation while your car is being serviced.
Patch vs. Replacement Costs
It’s easy to see the benefits and reduction of time and expense in patching a leak vs. needing to replace all or part of your exhaust system. That is why preventative measures are better than the cure once something has gone wrong.
However, suppose you’ve ignored (or didn’t understand) the warning signs of a vibrating gas pedal, dark smoke from the tailpipe, a burning or sulfuric odor, or a popping or tapping sound (the most common indicator). In that case, you might have to replace the whole exhaust system.
Depending on what needs to be replaced, parts can add up too. For example, replacing an exhaust manifold gasket for a Nissan Altima is between $400-$500 with costs and labor, but not including other charges.
While the cost for fixing an exhaust leak varies from $100-$400, at an average fee of $100 per hour for labor plus additional expenses for parts, exhaust system replacements can rack up a bill between $150 to almost $1200.