V8 cracked exhaust manifold

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McMac
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Joined: Wed Jan 14, 2015 7:47 pm
Location: Washington State

V8 cracked exhaust manifold

Postby McMac » Mon Feb 29, 2016 2:43 pm

My service advisor (who was a wrench turner for a bunch of years before moving out front) at the dealership I use, heard a slight hissing coming from my engine bay when I was last in for an oil change. I couldn't hear it. Turns out 1 of the exhaust manifolds was cracked and therefore leaking. He said the catalytic converter on these V8's is bolted right to the block (something like that) and generate a bunch of heat. It was under emission warranty (8yr 80k) and they fixed it no charge to me. He said he's seen this a bit in the Titan's, but never in a V8 Pathfinder. He also said there is no way to test for it and it won't show up in diagnostics. They test by just sticking their head in both front wheel-wells with the engine running and listen.


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V8Pathy
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Location: Los Angeles, CA

Postby V8Pathy » Mon Feb 29, 2016 3:49 pm

good to know. thanks for the info

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NmexMAX
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Location: Northern New Mexico

Postby NmexMAX » Mon Feb 29, 2016 4:32 pm

Yup, I also got mine replaced for free as well. I think I was at 75k or so and less than 8 years old at the time.

The manifold and cat convertor are 1 piece so therefore it's covered under that emissions warranty. Good thing.

Extremely common in Titans and Armada's.

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V8Pathy
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Location: Los Angeles, CA

Postby V8Pathy » Mon Feb 29, 2016 5:00 pm

beside the hissing noise...do you experience a sudden loss in power ?

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McMac
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Location: Washington State

Postby McMac » Mon Feb 29, 2016 5:47 pm

I wasn't even aware of it until he pointed it out, so I couldn't say. I've always had a great power curve with this drivetrain, so I don't recall any loss of power.

DanJetta
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Postby DanJetta » Tue Mar 01, 2016 8:31 pm

Mine made a ticking noise when cold. Both sides were cracked, which is apparently quite common. Mine didn't crack until about 125K miles. $3500 for parts and labor.

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McMac
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Joined: Wed Jan 14, 2015 7:47 pm
Location: Washington State

Postby McMac » Tue Mar 01, 2016 8:51 pm

That's helpful as I'm expecting the other side to go at some point. I'll be listening for that ticking sound.
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