Question about 1991 Buick Century

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Exhaust under hood is loud. Seems to be from behind the engine block. A manifold gasket? Hard to see it.

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Header pipe seal ring broken or just loose.

Posted on Nov 16, 2009

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another cause is broken loose or cracked fuel lines. this is equally dangerous since it is under hood close to hot exhaust manifold.

if smell is from exhaust manifold, which means not the smeel of gasoline but exhaust fumes, this can be caused by broken exhaust manifold or a crack on it or problematic exhaust manifold gasket.

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What would cause my 2002 zx2 to overheat ?


Faulty thermostat, failed water pump, inoperable radiator fan, low coolant due to leak, faulty radiator cap, leaking head gasket, low oil, major exhaust leak near front, exhaust blockage, or incorrect ignition timing. If there is crust around radiator cap, cap is leaking. How long does it take to overheat? If it runs smoothly when cool, and all fluids are at correct levels, you can rule our head gasket, radiator cap, and ignition timing. If it overheats very quickly and fluids are correct, it is probably thermostat or water pump. If it seems to do better at higher speeds, it is probably radiator fan. You can check this by allowing vehicle to run in Park with hood open. Monitor engine temp on dash. When it is at or slightly above normal running temp, radiator fan should come on. Also note exhaust sound. If it seems loud and overheats gradually, you may have a leak before the converter. If the exhaust sounds quiet, but exhaust manifold is getting extremely hot (may glow red), there is probably a blockage. There will also be OK starting and idle but poor acceleration if exhaust is partly blocked.

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2002 KIA spectra exhaust manifold


The exhaust manifold is right there as soon as you open hood , first disconnect neg batt cab, then jack up car remove bolts that hold pipe to manifold together , unplug any o2 that is in the way and that could get damaged. now from the top take shield off then take manifold bolts out. you might want to spray them with pb blaster and let set a few hours sense exhaust bolts love to break. Remember to use new gaskets installing new one.

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Starter motor


hi there,
shut down the engine for atleast 30 minutes to cool,the starter motor was located under beneath the engine,the pinion driver was coincide to flywheel,if you want replace starter motor,disconnect starter regulator cable, loosen two bolt on the engine starter motor holder,try to swicth starter motor on a free way that could go out on mounting space,the exhaust manifold mostly is behind the way of starter motor if hard to pull out,if necessary disconnect exhaust manifold replace exhaust manifold gasket,distortion on manifold gasket may happen after removing manifold
. pull out starter motor and replace a new one, put back also exhaust manifold if you disconnect it.
set fender covers on each fender to prevent paint damage
select the correct size open end box end wrench or ratchet, socket and extension. This procedure is much easier using the ratchet, socket and extension. Use your wrench to remove all of the manifold mount bolts. The manifold will now be free enough to access the gasket behind it
remove the old gasket using your putty knife. The gasket should come of mostly intact. Use your putty knife to remove any gasket material that remains on the engine block or the manifold. Any gasket material left on the mounting surfaces will cause leaks that inhibit engine performance coat the new gasket on both sides with a light coat of anti-seize compound. Put the new gasket in place against the block mounting surface. The anti-seize compound will hold the new gasket in place and prevent the gasket from sticking to the mounting surface, making future repairs easier.
push the manifold in against the new gasket and the block. coat the threads of your manifold bolts with a light coat of anti-seize compound. This will protect the threads on the bolt and the mounting surface. Start all manifold bolts by hand to ensure that the manifold is positioned evenly against the block. Be sure that the gasket remains lined up with the mounting holes. If the gasket slips out of position it will leak.
use your wrench or a torque wrench if required by the service manual to tighten all manifold bolts. Start the engine and check for any leaks. no leaks means you are done.
have a nice day don't forget to rate me,thanks a lot.

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