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Exhaust leak coming from the rear manifold exhaust gasket and I was wondering how do you replace the rear manifold exhaust? 2006 Chrysler Town & Country

You can hear the air coming from the rear manifold exhaust how do you replace the rear manifold exhaust gasket

My car has 165000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hello – most likely, this is an exhaust leak between the exhaust manifold, and the cross-over pipe. Removing the cross-over pipe will be the required process to replace the leaking gasket if this is the source. i recommend a engine noise inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, confirm this diagnosis, and give you an accurate assessment of damage and cost estimate for repairs.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Spray penetrating oil on the exhaust manifold bolts. Underneath, spray the bolts connecting the exhaust manifold collector to the exhaust pipe flange. Let all bolts soak for 10 minutes. Using a ratchet or a wrench, slowly apply pressure to the exhaust manifold bolts.
An exhaust leak in the manifold can cause a ticking sound much like hearing a musician`s metronome, especially when the engine is cold. Broken exhaust manifold bolts allow a cold manifold to seep gases around it versus through the exhaust system, creating that ticking sound.
The exhaust valves can get burned, the leak can damage oxygen sensors, or the problem can cause the catalytic converter to fail prematurely. It may also increase your fuel consumption, meaning you spend more on gas each week. This is a job best left to the pros since a leaking exhaust manifold can be dangerous.
Epoxy bonds and tapes can also be used to temporarily fix exhaust leaks. However, before applying them, clean and smooth the leaking surfaces. An aluminum patch will toughen the epoxy bonds. Once you are through, wrap the area with exhaust tape.
Source of the Leak

It could come from a manifold gasket, the catalytic converter, the muffler or somewhere within the pipes themselves. You will want a professional mechanic to inspect your vehicle and identify the source of the leak.

Listen for a loud rumble, especially while accelerating. You may also hear intermittent popping or hissing noises while the engine is running. An exhaust leak can affect the performance of your engine. You may notice that your vehicle doesn`t have its usual pick-up-and-go when you punch down the gas pedal.
You can hear a leaking exhaust manifold really well. The sound will come from the engine area, not from under the car and has a distinct loud ticking or snapping sound. This sound can often be mistaken for lifter noise or an engine knock, so it`s best to rule out an exhaust manifold issue first.
Low oil pressure might be the cause of those ticking sounds. When vital engine components don`t get adequate lubrication, it might cause other problems, and the engine starts to make these noises. A broken valve train component, such as lifters or cam followers, can also cause ticking, tapping, or clicking sounds.
In a worst-case scenario, an exhaust leak in the wrong place can lead to painfully expensive internal engine damage. When your exhaust plumbing carries fumes away from your engine, it`s doing more than just transporting harmful chemicals.
To the oxygen sensor, the change to the exhaust gases in the manifold can cause inaccurate readings. The escaping gases and the outside gases cause the sensor to read too lean.
Common signs include the engine constantly overheating, coolant leaking, engine misfires, and a decrease in power, acceleration, and fuel economy.
The exhaust and intake manifolds have no connection. Therefore, leaks in one do not affect the other.
Recommended Services. If you are wanting to fix a crack in an exhaust manifold rather than replacing it, you would need to clean the manifold up, weld the crack, and clean the surface up to a true connection as the manifold will distort when it gets very hot during the welding process.
Water leaking from the exhaust system occasionally may be brought on by natural sources. Some typical causes are engine heat, catalytic converter operation, and water condensation. If the underlying causes are due to these reasons, then there is no need to worry about it.
If you see liquid dripping out of the tailpipe, don`t panic. It normal and harmless condensation of water vapor This is caused by the exhaust system getting really hot, then cooling down, which causes moisture to collect, or condense, in the muffler and pipes. It then manages to flow and drip out the tailpipe.
Increased back pressure levels can cause increased emissions, increased fuel consumption, and can negatively affect engine performance.
Instead of a knock or ping, a faulty hydraulic lifter will usually make a sound more reminiscent of a tapping sound. The tapping will be quick in rhythm and may occur when the vehicle is cold or hot, depending on what the problem with the hydraulic lifter is.
The only way an exhaust leak can cause a rough idle is if the leak was in a place where it could enter the air intake system.
Usually, when the leak isn`t too bad, you will hear hissing noises coming from the engine. This may also sound like whining sounds or whimpering sounds. For more severe vacuum leaks, the noise is sucking or suction, much like a vacuum cleaner.
This tappet (lifter) noise can be very annoying and spoil the performance of an otherwise healthy V8 engine, making it sound worn, tired and on the eve of destruction.
If the ticking noises remain, the issue may be due to the oil pressure. Meanwhile, if the noise goes away after revving the engine, it`s likely you have an exhaust leak. Leaks on the exhaust manifold may point to different causes including bad manifold bolts or studs, a blown gasket, or a cracked or damaged manifold.
Shifty Business – Gear Shift Trouble

For example, if the catalytic converter or exhaust is clogged, the engine may experience a back-pressure problem, making it difficult for the transmission to change gears. An expert technician will need to perform an inspection to confirm the exact cause of the shifting problem.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Exhaust leak coming from the rear manifold exhaust gasket and I was wondering how do you replace the rear manifold exhaust? 2006 Chrysler Town & Country
ANSWER : Hello – most likely, this is an exhaust leak between the exhaust manifold, and the cross-over pipe. Removing the cross-over pipe will be the required process to replace the leaking gasket if this is the source. i recommend a engine noise inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, confirm this diagnosis, and give you an accurate assessment of damage and cost estimate for repairs.

Is manifold gasket replacement a diehard requirement for manifold r&r?
ANSWER : The intake manifold gasket can be reused if it is not damaged in any way. The cost of the new gasket versus removing the intake again if it leaks is something to think about. Consider if it’s worth the risk to reuse it if you had to do the job twice. The manual for your Pontiac Grand Am says you can reuse it as long as it is not damaged, but I personally would not reuse it.

If you need some assistance with this, consider YourMechanic, as a certified technician can come help you with the repairs you’re making and service your intake manifold gasket as necessary. Good luck.

New exhaust gasket and manifold, still have exhaust leak.
ANSWER : The trouble with small exhaust leaks is that they always turn into large exhaust leaks. The hot gas leaking past the gasket will eventually burn up the gasket making the leak worse. If not corrected, it will also burn the surface of the exhaust manifold. It rarely goes so far as to burn the cylinder head, but that can happen in extreme cases. To make matters even more complicated. having an exhaust leak also allows air to enter the exhaust stream and messes with the oxygen sensor reading. Mixture too lean trouble codes will follow as the system shifts rich to try to correct. So, if you want to keep this truck, you need to get this fixed. I’m not sure I buy the line about the head being warped enough to prevent the manifold from fitting, maybe you should get a second opinion on this. You can have this done by contacting Your Mechanic. They will send a technician to your home or office to check out your exhaust leak and let you know what can be done about it.

aloha! i was told it would cost me $1870 to get a rear axle replacement. i have a 2006 toyota sequoia with mileage of 80,000. it
ANSWER : Aloha. Ah – the infamous "it’s all gone" excuse. To be quite blunt, you’re being ripped off. If a professional mechanic can’t explain what exactly is damaged with any mechanical component, they are taking advantage of you. I would get your car back and contact a different mechanic. Or, feel free to send us some information about the symptoms your car is experiencing that led you to take the car to the mechanic in the first place. Maybe we can help diagnose your issue and allow you to bring that info to a different mechanic. Mahalo.

i have a 1994 z28 and i did a head gasket replacement for some blown head gaskets. I then tried changing the timing gears and when
ANSWER : Hi there. It really depends on the location of the motor (meaning if it’s installed in the vehicle or loose and on an engine stand), that would factor into the price and whether this is a project one of our mobile mechanics can complete. We can complete the oil pan gasket replacement, but some of the other jobs like wiring harness, intake and rocker arm installation is outside of our scope of service. In regards to estimates for those services, I would suspect it would cost anywhere from $400 to $1,000 based on where it’s completed and what supplies would be needed.

Exhaust manifold leak gaskets
ANSWER : The heat generated by this engine at the higher power levels required to haul these rigs around causes much more expansion and movement of the exhaust manifold relative to the block. The manifold expands, and either cracks, or warps, and leaks around the gasket. Having the manifold machined flat, and using a gasket sealer that "moves" with expansion and contraction is one solution. There are also multi-piece aftermarket exhaust manifold solutions that alleged are also a solid solution.

I got p0133 after fixing exhaust manifold leak
ANSWER : There is a technical bulletin to reprogram the ECM for the code P0133. The computer calibration would need to be changed by a dealer. If after the reprogramming is completed and the vehicle is driven- if the code returns then we at YourMechanic can replace the O2 sensor at your convenience.

Exhaust Manifold Hot/Exhaust Leak
ANSWER : Hello. To say that they catalytic converter is good or bad is impossible without having the car here. If the manifold is heating up, and the catalytic convert has failed, you will see bigger signs of failure in the near future. If you do not feel the need to replace the cat right now, and feel you can wait, then you should. A failed cat will result in bad gas mileage, misfires, and even audible clanking noises with certain failures. Have him replace the bad gasket, which can absolutely be the cause of the smell, and proceed from there. You do want to consider what caused the gasket to fail. Being 10 years old its not unheard of for a gasket to go bad, but if the manifold is truly heating up, it will expedite that process. But trust your gut, and if you honestly think the car is running fine, then hold off on replacing the catalytic converter. Get a second opinion on it was well.