Friday, November 18, 2011

Inspecting and replacing Exhaust system on Acura Car models?


If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

The procedure is as follows :---

Exhaust System Inspection


Safety glasses should be worn at all times when working on or near the exhaust system. Older exhaust systems will almost always be covered with loose rust particles which will shower you when disturbed. These particles are more than a nuisance and could injure your eye.

CAUTION
DO NOT perform exhaust repairs or inspection with the engine or exhaust hot. Allow the system to cool completely before attempting any work. Exhaust systems are noted for sharp edges, flaking metal and rusted bolts. Gloves and eye protection are required. A healthy supply of penetrating oil and rags is highly recommended. See Figures 1 and 2



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Fig. Fig. 1: Cracks in the muffler are guaranteed to cause a leak


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Fig. Fig. 2: Check the muffler for rotted spot welds and seams
Your vehicle must be raised and supported safely to inspect the exhaust system properly. By placing 4 safety stands under the vehicle for support should provide enough room for you to slide under the vehicle and inspect the system completely. Start the inspection at the exhaust manifold or turbocharger pipe where the header pipe is attached and work your way to the back of the vehicle. On dual exhaust systems, remember to inspect both sides of the vehicle. Check the complete exhaust system for open seams, holes loose connections, or other deterioration which could permit exhaust fumes to seep into the passenger compartment. Inspect all mounting brackets and hangers for deterioration, some models may have rubber O-rings that can be overstretched and non-supportive. These components will need to be replaced if found. It has always been a practice to use a pointed tool to poke up into the exhaust system where the deterioration spots are to see whether or not they crumble. Some models may have heat shield covering certain parts of the exhaust system , it will be necessary to remove these shields to have the exhaust visible for inspection also.
See Figures 3 through 7
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Fig. Fig. 3: Make sure the exhaust components are not contacting the body or suspension


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Fig. Fig. 4: Check for overstretched or torn exhaust hangers


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Fig. Fig. 5: Example of a badly deteriorated exhaust pipe


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Fig. Fig. 6: Inspect flanges for gaskets that have deteriorated and need replacement


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Fig. Fig. 7: Some systems, like this one, use large O-rings (donuts) in between the flanges

REPLACEMENT



See Figures 8, 9, 10 and 11
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Fig. Fig. 8: Top view of the manifold down pipe on an Integra


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Fig. Fig. 9: Use a pick tool to remove the gasket from the exhaust manifold down pipe


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Fig. Fig. 10: Use rope to tie the exhaust to the vehicle when removing the mounting hangers. This will prevent any accidental injury due to falling components. As always, never work on a hot exhaust


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Fig. Fig. 11: Always use two hands when removing the lower half of an exhaust manifold. Many are made out of cast iron an can be cumbersome
There are basically two types of exhaust systems. One is the flange type where the component ends are attached with bolts and a gasket in-between. The other exhaust system is the slip joint type. These components slip into one another using clamps to retain them together.

CAUTION
Allow the exhaust system to cool sufficiently before spraying a solvent exhaust fasteners. Some solvents are highly flammable and could ignite when sprayed on hot exhaust components.

Before removing any component of the exhaust system, ALWAYS squirt a liquid rust dissolving agent onto the fasteners for ease of removal. A lot of knuckle skin will be saved by following this rule. It may even be wise to spray the fasteners and allow them to sit overnight.
See Figure 12
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Fig. Fig. 12: Nuts and bolts will be extremely difficult to remove when deteriorated with rust
Flange Type

CAUTION
Do NOT perform exhaust repairs or inspection with the engine or exhaust hot. Allow the system to cool completely before attempting any work. Exhaust systems are noted for sharp edges, flaking metal and rusted bolts. Gloves and eye protection are required. A healthy supply of penetrating oil and rags is highly recommended. Never spray liquid rust dissolving agent onto a hot exhaust component. See Figure 13



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Fig. Fig. 13: Example of a flange type exhaust system joint
Before removing any component on a flange type system, ALWAYS squirt a liquid rust dissolving agent onto the fasteners for ease of removal. Start by unbolting the exhaust piece at both ends (if required). When unbolting the headpipe from the manifold, make sure that the bolts are free before trying to remove them. if you snap a stud in the exhaust manifold, the stud will have to be removed with a bolt extractor, which often means removal of the manifold itself. Next, disconnect the component from the mounting; slight twisting and turning may be required to remove the component completely from the vehicle. You may need to tap on the component with a rubber mallet to loosen the component. If all else fails, use a hacksaw to separate the parts. An oxy-acetylene cutting torch may be faster but the sparks are DANGEROUS near the fuel tank, and at the very least, accidents could happen, resulting in damage to the under-car parts, not to mention yourself.
Slip Joint Type See Figure 14
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Fig. Fig. 14: Example of a common slip joint type system
Before removing any component on the slip joint type exhaust system, ALWAYS squirt a liquid rust dissolving agent onto the fasteners for ease of removal. Start by unbolting the exhaust piece at both ends (if required). When unbolting the headpipe from the manifold, make sure that the bolts are free before trying to remove them. if you snap a stud in the exhaust manifold, the stud will have to be removed with a bolt extractor, which often means removal of the manifold itself. Next, remove the mounting U-bolts from around the exhaust pipe you are extracting from the vehicle. Don't be surprised if the U-bolts break while removing the nuts. Loosen the exhaust pipe from any mounting brackets retaining it to the floor pan and separate the components.

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