Question about 2000 Lexus ES 300

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How much does it usually cost to get a cracked exhaust manifold fixed. 1994 es300.

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That is not a common problem for a es 300
have you checked for loose manifold or broken manifold bolts? also they will blow out a piece of gasket depending on if they are metal or depends on which side of the engine that needs replaced if it is crack.

Posted on Jun 17, 2009


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Why does my manifold turn red when I already changed the catalytic converter on my 2000 Toyota Avalon

Usually, a red manifold means that you have a lot of unburned fuel going into the exhaust stream. Most likely cause of this would be a cracked or warped exhaust valve or valve seat. A compression check of the engine cylinders can confirm a leaky valve quickly. Another possibility would be a blockage in the exhaust stream. Converters can break up and their parts can move through the exhaust and clog up the muffler. In theses cases, however, there is usually a significant loss of power on acceleration and often both the converter and exhaust manifold will get red hot.

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1987 Ford f350 lariat idles louder than usual and makes ticking sound that it used to not do. Been told few times it's an exhaust leak... Not sure. Any suggestions? And how expensive is it to get an...

There is a tick noise that comes from a failed exhaust gasket or cracked manifold. You will have to remove the manifold to replace the gasket. To go to all that trouble I would have the manifold machined to ensure that it is straight as they have a tendency to warp from the heat and from incorrect tensioning sequence of the manifold bolts/studs

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Exhaust manifold

A cracked exhaust manifold should not effect your motor unless you have an exhaust driven turbo or something depending on exhaust back pressure to be there. I know where I live you can not get a vehicle with exhaust leaks infront of the passengers compartment inspected though so you may want to have the leak fixed for passenger safety.

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When driving i can smell gas in my 2000 lexus es300

possibly your O rings which isolates fuel injectors from engine block are getting old and letting gasoline go out. it is very dangerous since it can cause fire. do not drive.

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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Were is the oxegen censor on a 1995 es300 lexus

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Application: Number one

Hope help (remember rated this).

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Take it to a muffler shop, they work on exhaust problems all the time and may just need a new gasket from the collector flange which would not be that expansive. Almost all of them will inspect for free since there looking for your business.
I have not sean exhaust manifold go bad before the whole car or truck and the exhaust pipe is stainless so good chances are that it's the flange gasket or the bolts may have broke due to time and vibration.
Good luck and keep me posted.

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1 Answer

There is smoke coming from a crack in the exhaust manifold


Most unusual for the exhaust manifold to crack, normally any leaks are usually due to faulty manifold gaskets, or the down pipe sealing ring.

I am sure if you lubricate the fixing nuts well, before removal of the manifold, this is what you will find.

Good Luck !

Give me feed back if you like.

A FixYa rating would be Nice...Thanks...John.

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