How to Replace the Exhaust Manifold in a Nissan Altima
The Nissan Altima offers a five-passenger sedan with performance which appeals to the car enthusiast. The biggest upgrade in the Altima came in the third generation debuting in 2002. The 3.5L V6 engine boasts of 240 horsepower and was a popular choice. Follow the suggestions to walk the do-it-yourself mechanic through the installation of the exhaust manifold on the 3.5L engine.
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Instructions
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Remove the Exhaust Manifold
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1
Remove the negative battery cable. Take the exhaust pipes from the exhaust manifolds and discard the gaskets. Remove the protective covers from the manifolds.
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2
Disconnect the heated oxygen sensor from the manifold. Loose the exhaust manifold-to-engine mounting nuts.
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3
Remove the nuts from the exhaust manifold. Lift the manifold from the engine and discard the gasket.
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4
Scrape the mating surfaces to remove any gasket material, dirt and carbon deposits. Wipe the surfaces with solvent to remove any traces of debris. Check for damage.
Install the Exhaust Manifold
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5
Install the new gasket to the cylinder head. Position the exhaust manifold over the new gasket and finger-tighten the nuts.
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6
Tighten the manifold nuts in sequence, working out from the center. Torque the nuts in three passes to 21 to 24 foot pounds.
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7
Put the protective shields in place. Torque the bolts in three passes to 46 to 57 inch pounds.
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8
Connect the exhaust manifolds to the exhaust popes. Torque the nuts to 32 to 37 foot pounds.
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9
Position the oxygen sensor on the manifold. Torque the fastener to 30 to 44 foot pounds.
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10
Reconnect the negative battery cable. Start the engine and allow it to run for several minutes until warm. Check for exhaust leaks and proper engine operation.
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Tips & Warnings
A 2002 Altima in mint condition is a great find for the used-auto buyer.
