Question about 1989 Toyota 4Runner

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Replacing an exaust manifold in a 1989 4Runner

Hi -- I'm told I have a crack in my exhaust manifold. Mechanic quoted me $450. Is this something I can take on?

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See where the crack is. if it only requires a gasket, 450 is too much.

Posted on Dec 21, 2008

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Exaust fumes going in the cab of 2006 dodge sprinter


Have rear wheel wells checked for cracked seam sealer. The sealer is used at metal to metal joints to prevent the exhaust fumes from entering cab and when not applied right or missed this could happen..

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probably not the cat at all but a cracked flexible section in the exhaust pipe before the cat or a crack at the flange at the exhaust manifold
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Pass on the mechanic and go to an accredited muffler/ exhaust fitting shop and get a diagnosis and a quote

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It's exhaust manifold. There are two manifolds, the intake manifold in the valley between the cylinder heads, and the exhaust manifolds, one on each side of a v figured engine.

And, yes, a leak in the exhaust or the intake will make it run lean. If the leak is close to the engine, it can do harm to the valves, too. There is a gasket between the exhaust manifold and the engine block. Likewise, there is an intake manifold gasket between the intake manifold and the block.

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this may be due to an oil leak getting onto the manifold or the manifold is cracked and exhaust gas is building up in the engine.

if smoke is intence and black this indicates oil.
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get checked by a mechanic


i hope this was useful.

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I have a 1994 Ford F150 extended cab 5.0 v8. I need to change the exaust manifold gaskets, how can I do this and what tools and what will I need to do?


Hi! Here are some guides on removing and replacing the exhaust gasket:
- You may need a 12mm and 14mm closed and opened wrench
- Make sure that the engine and exhaust is cooled down before performing the procedure to prevent injuries.
- The exhaust manifold may have a cover, please remove it using the wrench
- Once opened, remove the nuts of the exhaust manifold
- Support the exhaust before pulling it out for it may hit the ground
- Place the new exhaust gasket in place
- PUt the exhaust manifold and tighten the nuts evenly
Hope this helps and good luck!

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Have problem with my hyundai santa fe exaust system 2004 2.4l.


If you are getting exhaust fumes in the engine compartment I advise checking the exhaust manifolds for cracks. When the engine is cold remove the heat shield from the manifold using a 12mm socket and inspect from the top and underneath for any cracking.

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LOSS OF POWER EXHAUST LEAK WHERE MANIFOLD PIE CONNECTS TO EXHAUST


if the exhaust is just cracked i wouldnt worrie about the engine because you still have a lot of backpressure and it should not burn a valve. but replacing the header is a good idea if the header itself is cracked. and to tell you the truth your mechanic should be responsible for the cost of the repair since he broke it in the first place. In the shop i own if one of my mechanics breaks something it comes out of my pocket to replace. its all part of the job sometimes things just happen and you have to take the responsibility for it

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Sounds weird that this problem keep occurring over and over. Does it crack in the same spot every time?

Only two things I can think of that would cause this problem.
1. Extensive over heating, I've seen a exhaust manifold get glowing red hot because of a bad oxygen sensor.

2. Excessive Vibration. The whole exhaust line to the back of the car is moving around too much or too stiff. The exhaust line needs to move around enough to take the movement/vibration of the engine. I would check out for bad motor mounts and worn out exhaust pipe mounts.

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1 Answer

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there is no connection betwen the doughnut gasket on the outlet of the exhaust manifold and the head gasket. The head gasket is under the cylinder head and does not crack. It may blow due to compression pressure leaking between the head and the block.
Are you sure you don't have a brkoen stud on the exhaust manifold where it mounts to the blcok? Known Nissan isue. The bolts don't stretch when hot and eentaully they all break off. Newer studs do stretch.

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1 Answer

There is smoke coming from a crack in the exhaust manifold


Hi

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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