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Exhaust leak near manifold - 2002 Ford Explorer

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Possible loose/broken manifold bolts....cracked manifold....front pipe gasket to manifold.... If you look closely sometimes the area of the leak will have a black color to it. May help you isolate the leak

Posted on Apr 06, 2015

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Posted on Jan 02, 2017

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Hard start, acts flooded, turn key a couple of times to build fuel pressure then starts. Runs fine after


hi.fault codes indicate feul presure or leaks.if feul presure is ok and no vacuum leaks at vacuum pipes intake manifold or brakebooster it can be a exhaust leak if no leaks it can be a blocked cat or not enough back presure like exhaust box removed or cat insides removed .hope this helps

Jan 16, 2016 | 2002 Subaru Outback

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Leaky muffler type sound from engine when under a load


check for a leaking manifold gasket or cracked manifold. If it is a front wheel drive car there may be a flexible bit near the engine to allow the engine to move in the mounts . This bit of flexible exhaust is known to crack under the brading.

Nov 16, 2014 | 1998 GMC Sierra

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Exaust intake leaking


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.

Apr 04, 2014 | 1998 Ford F150 Regular Cab

1 Answer

Loss of engine power, loud whistling noise


Exhaust manifold leak? That's not common. You talking about the VVT near the manifold at the top of engine above the power steering pump? Yes indeed, AC Delco is the only one our engines love. 41-103. Obviously you have P0304, what other codes?

Mar 16, 2017 | 2002 Chevrolet TrailBlazer

1 Answer

P0420 engine code


P0420 is a catalytic converter inefficiency code. The most likely problem is the catalytic converter is no longer able to function. The cat is monitored by the downstream O2 sensor. Unless there was a leak near that sensor than its unlikely (but not impossible) that an exhaust manifold leak is causing the problem.

What is possible is that the leaking exhaust manifold is skewing the readings for the upstream O2 sensors which could effect the life of the cat if the vehicle is running slightly richer than it should be.

Feb 24, 2012 | 2003 Hyundai Santa Fe

3 Answers

Exhaust makes a loud tick when first started


usually an exhaust leak, at exhaust manifold to head, broken stud maybe. Use a piece of hose to your ear and listen at manifold.

Dec 06, 2010 | 2002 Ford Mustang

1 Answer

WHERE TO LOOK FOR EXHAUST LEAK


There are several areas to check for possible exhaust leaks. i will list them below.

1. Exhaust manifold gaskets - This will be the most common area. There is a gasket that separates the block from the exhaust manifold. these gaskets can fail, thus, causing a exhaust leak at the manifold.

2. Lower manifold gasket(donut gasket) - This will be a possible leak spot as well. This small circular gasket is placed in between the upper exhaust pie and the lower side of the manifold. It basically separates the pipe from the exhaust manifold.

3. Exhaust pipe - The entire pipe can rust overtime, thus, creating small holes along the pipe structure. These holes will cause the exhaust to leak ,thus, filling the vehicle will moderate fumes and causing louder than normal engine sounds during revving.

4. Muffler - This component can also deteriorate to the point that it cannot filter out the noise. It will also cause leaks as well.

You will find the leak in one or all of the areas stated above in the list.

Jun 13, 2010 | 2006 Chevrolet HHR

1 Answer

2001 silverado when accelerating truck almost sounds like has a exhaust leak but is not a exhaust leak any ideas


You may have a crack in crossover pipe on driver side near exhaust manifold where it bolts to crossover pipe flexing from engine movement opens crack on acceleration, check for cracks on both sides driver and passenger.

Feb 04, 2010 | 2001 Chevrolet Silverado 1500

1 Answer

Exhaust leak somewhere near exhaust manifold or below. Whats the easiest way to locate the leak?


the exhaust manifolds on those are know to crack just above where it meets the collector

Nov 25, 2009 | 1996 Jeep Grand Cherokee

1 Answer

I have a 2003 Ford Escape with a PO420 error code. When I accelerate, it sounds like air is coming from my engine. What is the problem and what should I do?


Here's what the code means, P0420 -- Catalyst System Efficiency Below Threshold (Bank 1).
Causes: Bad O2 senor, bad catalytic converter, and/or leaking exhaust manifold.


The error is coming from the O2 sensor number 1 between the exhaust manifold and the catalytic converter. The sensor itself may not be the problem. From what your describing is maybe a leak coming somewhere near the exhaust manifold. This would set off the P0420 code. Look around the exhaust manifold down to the catalytic converter for leaks that will leave black marks from burned fuel. If this can't be easily found, you may have to take the car in and have the exhaust hooked up to a smoke machine. This will inject smoke into the tail pipe and any leaks will be found by the smoke coming out of it.

Nov 16, 2009 | 2003 Ford Escape

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