Question about 2001 Hyundai Sonata

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Exhaust Manifold crack on R Reg 2.0 Litre 4cyl Sonata

Small crack means exhaust noisy on start-up. Want to fix ahead of MOT ...

Can this be welded?? If not any suggestions for parts supplier

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Yes it can be welded.

Check out this sight for tips and tricks.
Good Luck !

A FixYa Rating Would Be Appreciated Thanks !


Posted on Feb 07, 2009


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1 Answer

What is the cause of noisy engine

What kind of noise? Inside an engine there are pretty heavy explosions taking place and they tend to be very noisy, which is why an exhaust system is fitted. The task of this system is to cool down the exploded gases and allow them to lessen their pressure before bringing them in contact with the cooler air outside. If any part of the exhaust system malfunctions, the engine will be noisy.

This system consists of the exhaust manifold, which is bolted directly to the cylinder head and sealed with a manifold gasket, The first exhaust section is usually bolted to this with a flange, which has a gasket or ball and socket seal.

Check the gaskets and check for cracks. After the first exhaust section you will usually find either the second section or the muffler, which allows the gas to expand. Check for cracks or breaks in this unit. From there a further pipe goes to the rear of the car, or in some cases to a resonator box which looks like a second muffler. This has to do with tuning the frequency of the exhaust gases to allow a free flow of exhaust gas at cruising speed to enhance fuel consumption. Check here also for cracks, breaks.

Another kind of noise from the engine could be knocking, which could mean serious engine trouble. If this is the noise you hear, take it to a repair shop immediately.

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1 Answer

How to fix cracked manifold

J B Weld ,mix a/b and seal hole ,dries hard. Intake manifold has a little vacuum,it will work. Exhaust manifold has alot of pressure might not work, Junk yard, get replacement part. Parts do rot out!!

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A crack in the exhaust manifold will definitely cause the Check Engine light to come on as the O2 sensor is detecting exhaust gasses that have too much oxygen. The computer adjusts the fuel mixture and you end up wasting fuel and burning a lot of it in your catalytic converter (which will eventually clog and fail).

Welding is usually not an option - but if someone will do it and guarantee the work - go for it. Otherwise, this can be a fairly expensive job. Your regular mechanic might be able to do this work - but you may have been luck at an exhaust specialty shop like Midas or Meineke.

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Found a crack in the exhaust manifold

transmission solenoid and misfire code unrelated
but need looking into
02 sensor should be fixed with replaced 02 sensor
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cast iron zorst manifolds
if the crack takes up when engine is running
not urgent
when ready source
a used manifold without a crack from a wrecker
cracks in cast iron zorst manifolds cant be welded

or buy (extractors )metal exhaust manifold
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Mar 07, 2017 | Cars & Trucks

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Crack in factory weld on manifold

your going to have to fix that double quick.
If it's the intake manifold you can try "BLACK SILICONE" on the crack.
Black high temperature will hold till you can find a welder that does Helli arc.
Exhaust cracks need to be arc welded if they're steel or iron.

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2002 Kia Spectra - Cracked Manifold/Exhaust

havent seen one yet that works, they last a day or two then exhaust leak is back, how about cutting off the flange and welding in a small piece that has a flange on it, or try to have the pipe welde at a muffler shop.

Apr 23, 2010 | 2002 Kia Spectra

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Hyundai sonata 2000 cdx 2001 auto> The car starts and runs perfectly fpr 15 mins , The after 15 mins it idles extremely roughly , coughs , splutters ,and soon as you hit the accelraotr it dies.Also the...

Sounds like you have a plugged up catalytic converter. You cant clean them it will need replaced. If it is the 4cyl engine, the converter is the exhaust manifold on the front of the engine.

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What repair is needed to stop exhaust manifold leak and what do i need to do the at home repair

It depends on the leak. First of all - see if you can see any cracks on the manifold - telltale signs would be a visible crack and black residue around it from exhaust. If you see that the manifold should be replaced. - welding would be a possible alternative. If there are no cracks - check all the nuts and studs to make sure they are tight. Make sure the exhaust pipe is tight and not leaking at the connection. If everything looks tight and secure - change the exhaust manifold gasket. All of that could be done at home depending on your comfort leel with the tools and time available.

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Tickin 2000 chev tracker

new lifters?,,,,,,an over haul could help.....but it takes alot of money.....

does it sound like almost a "diesel engine"

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alot of brands and chemystries but "RISLONE" could help....

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