Emissions and Exhaust Systems
Chevy Astro
Hyundai Accent

What will happen if you do not replace an exhaust manifold that is leaking?

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Wiki User
2006-10-07 11:38:35
2006-10-07 11:38:35

If the leak is against the head, it can burn tracks into the exhaust port faces as if done by a cutting torch.

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If you do replace it correctly, it will work as designed.

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Advanced timing can cause that to happen

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It would be a waste of time and money. You would have to make a special adapter to hook the exhaust to the manifold. On a turbo header, the exhaust hooks to the turbo and the turbo to the manifold.

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it could be an oil leak.. my boyfriend had that happen to his s10 and he had oil leaking into his exhaust system

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Yes, it could. What could happen is it leaks as you are going down the road and leaks onto the exhaust manifold and creates the smoke.

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The fluid can get on the exhaust, very slight chance of a fire. If all the fluid leaks out, you will not have steering assist.

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I had that happen once. That's a bad thing. That's either cracked head, blown head gasket, or cracked block.Not necessarily. The intake on some vehicles, especially late models, the coolant circulates thru the intake manifold. You could have a leaking hose or leaking manifold gasket. You would have other problems like cooant in the oil or oil in the coolant if you had a cracked head/block or a bad head gasket.

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It is something that does happen from time to time. Replace the o-rings on the sensor and the plastic adapter housing it sits in.

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Do you have an exhaust leak? Do you happen to have have an exhaust leak or a damaged water pump bearing?

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Most likely it's a ruptured heater core, leaking coolant. But before you replace the heater core, check the connections outside the firewall. Sometimes a leaky connection will drip to the inside... but don't expect it; it doesn't happen often.

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Nothing....just call someone to lick it !!

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exhaust will be smoky. exhaust temperature will be high

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nothing will happen it will just sound different

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There are too many reasons this can happen to be positive, however the most common reason is the exhaust pipe is not snug, or bad gasket at the manifold. Where it bolts to the cylinder. If it is not that, you will need a harley mechanic to look at it.

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Usually this means a head gasket is leaking somewhere. Or if you happen to have a oil cooler mounted to the radiator that could be be where it is leaking, but this is not usually the case. If you notice whitesh smoke out of the exhaust then it is definitely a head gasket leak. Usually the oil will also contain some coolant in it. It will appear as a whitesh foam. This needs to be fixed bc it will only get worse.

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What will happen if u I added power steering fluid to a leaking power steering pump

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Nope, the manifold carries out the burnt fuel air mixture (usually 14/1) then it enters the cylinder through the intake valve, then after the piston reaches the top on the compression stroke, your distributor connects the high voltage ignition coil to the spark plug wire, inside the cylinder the spark jumps across the gap between the electrodes of the spark plug and THAT is what ignites the fuel... Now, if the timing is off, or the mixture too rich, some unburnt mixture could go into the exhaust manifold, and the high temperature there might cause it to ignite there, but that is caled a backfire, the noise is like a shotgun and flames go out the exhaust pipe and it may blow up your muffler, but that is very wrong, it shouldn't happen.

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this sounds like a bad exhaust gasket. since everything in an aurora is computer controlled the exhaust gas regulator/sensor would sense that there's not as much exhaust coming out as there should be and will increase the idle in an attempt to match protocol. it glows hot because of the principle that air is flammable. if hot gases are allowed to escape around the manifold and they meet with cooler air it will cause the manifold to glow red as if it were on fire. it won't get hot enough to actually catch fire but it will cause irreparable damage to the manifold and heads if it's not corrected immediately! without being able to see this happen i can't be sure, though... maybe post a video on youtube and send me a link...

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No its not that easy of a job and if you continue to run it this way, then you could damage the engine.................

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Depends if its leaking or not. If its leaking I don't think I would drive it your exhaust pipe gets VERY hot when driving even idling and if the gas gets onto the exhaust it could ignite. If its just not sending the proper amount of fuel to the engine I probably would drive it either because no tell how long the fuel pump will maintain pressure. But the worst that will happen is it will stop running and you will have to have to towed. If the vehicle is over fueling, it can wash away the lubricant from the bores, and dilute the oil in the sump. That will cause the engine to seize.

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What type of filter do you have? If you have a DE filter then you may have cracks in the manifold that the tubes slot into or the filter tubes are falling out of the manifold. Either way you will most probably need to buy a new manifold.


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