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Old 06-22-2016, 10:47 AM   #1
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Exhaust leak

The other night, my wife was pulling back in from a weekend in the rv. I was guiding her in and as she was giving it a little gas to inch up a slight incline in the driveway, I could hear what sounded like an exhaust manifold leak. The engine was under a slight load and as she gave it gas I could hear the telltale tick, tick, tick, from the right side exhaust area. Has anyone else developed an exhaust leak on their v-10s? Not sure it it would be coming from the manifold itself or where the pipe connects to the manifold, I just didnt have time to look at it before she left on another trip. I am still under warranty, not sure if it would be covered. I would assume it might be easier to try and tighten it up myself rather than going through the hassle of getting it into the ford dealer. Your thoughts?
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Old 06-22-2016, 12:03 PM   #2
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If you're lucky, it's a leak at the manifold - down pipe, or some other joint in the exhaust system. If not lucky, it could be a broken exhaust manifold bolt or cracked manifold. Get it checked not only for warranty but also so the leaking hot exhaust doesn't cause further damage to something near the leak.

A tick - tick sound makes me think it's the manifold or a bolt, not a leaking exhaust joint.
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Old 06-22-2016, 06:44 PM   #3
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Quote:
Originally Posted by mojoracing View Post
The other night, my wife was pulling back in from a weekend in the rv. I was guiding her in and as she was giving it a little gas to inch up a slight incline in the driveway, I could hear what sounded like an exhaust manifold leak. The engine was under a slight load and as she gave it gas I could hear the telltale tick, tick, tick, from the right side exhaust area. Has anyone else developed an exhaust leak on their v-10s? Not sure it it would be coming from the manifold itself or where the pipe connects to the manifold, I just didnt have time to look at it before she left on another trip. I am still under warranty, not sure if it would be covered. I would assume it might be easier to try and tighten it up myself rather than going through the hassle of getting it into the ford dealer. Your thoughts?
mojoracing,
Well, first off, I gotta tell ya, you stating your wife was returning from a weekend trip and, "she left on another trip", cracked me up. I don't read that much about "wives" venturing off without the man along with them. Oh well, apparently it's pretty cool with the both of you.

Anyway to your problem. First, my first thought is, YES, do let the warranty handle it. I say that because, you're paying for warranty so, get the most out of it. But, I, like you, even when I had warranty on certain vehicles, would take on small repairs, adjustments, alterations, whatever, if I could handle the repair/adjustment etc. and, it would save me the hassle of getting the vehicle to the dealership for warranty work.

If it were me, I'd break out my handy wrenches and climb around under the coach or, lift the dog house or what ever it takes to get at the down-pipe that leads from the manifold and see if those attaching nuts/bolts are loose. If their tight, I'd try and tighten the manifold bolts a tad to see if any of them are loose.

You might have also, a connection further on down the line, near the catalytic converter too that has vibrated itself loose. I hate exhaust leaks. I'm on them as soon as I hear them. Good luck.
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Old 06-22-2016, 09:16 PM   #4
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Normaly, we both go on our trips. Our daughter races motorcycles all over the country and with the both of us still working, we have to divide up our time to be able to get her to all the nationals. She drives our rig with race trailer behind at 65' long all over the country. She had just pulled in from wisconsin and headed out the next night to be in Macon georgia the next day. She handles the rig better than most men and can change out rings and pistons on the motorcycles as well! You can see a picture of the whole rig to the left in my avatar.
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Old 06-22-2016, 09:21 PM   #5
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I wouldn't let it go too long.

I know it is different but we had a Class C with a 460 in it. My wife was getting ready for a trip and when she started the RV it sounded like a tank. I was out of town, I told her not to move it. When I got home and popped the dog house off the top I could see the crack in the manifold. The exhaust was pointed at a wiring harness that had already started to melt. The RV was still under warranty so I went that route. Unfortunately it took +14 weeks to fix because Ford was having big problem with manifolds and there were none (nada, zero, zip, ABSOLUTELY none) anywhere in inventory in the entire USA [yes I checked myself].

Guess who fixed the next one when it failed out of warranty, I bought and after market one. Oh yea, the first one ultimately warped and I had to have it shaved to be able to get it to seal.
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Old 06-23-2016, 06:03 AM   #6
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I just had the exhaust leak fixed on my 8.1 Vortec. All studs but one came out, the one that didn't was rusted and broken. Funny thing is, the leak wasn't where the broken stud was located. He had to tack weld a nut to the broken stud to get it out. I had soaked all the studs in Kroil over the winter to aid in removal. I replaced all studs/nuts with ARP stainless exhaust studs. Hopefully, that is the end of that, at least on the passenger side of the engine.

I could always hear the leak but couldn't find it. I had to sit under there with the engine running and feel around for quite some time before locating the leak. I also had the donut leak the year before but that repair was much easier.

I believe your V10 has aluminum heads, which should make removal of a broken stud a bit easier. My Vortec heads are cast iron.
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Old 06-23-2016, 06:44 AM   #7
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The issue with not getting it fixed quickly is that the hot exhaust gas's will erode the sealing surfaces, making it a bigger job.

You also want to make sure you dont have a loose spark plug.
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Old 06-24-2016, 09:36 AM   #8
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It also can affect the fueling through the O2 readings.
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Old 07-03-2016, 08:15 AM   #9
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I just had the exhaust leak fixed on my 8.1 Vortec. All studs but one came out, the one that didn't was rusted and broken. Funny thing is, the leak wasn't where the broken stud was located. He had to tack weld a nut to the broken stud to get it out. I had soaked all the studs in Kroil over the winter to aid in removal. I replaced all studs/nuts with ARP stainless exhaust studs. Hopefully, that is the end of that, at least on the passenger side of the engine.

I could always hear the leak but couldn't find it. I had to sit under there with the engine running and feel around for quite some time before locating the leak. I also had the donut leak the year before but that repair was much easier.

I believe your V10 has aluminum heads, which should make removal of a broken stud a bit easier. My Vortec heads are cast iron.


FWIW: I too, have the tick, tick, ... exhaust leak on the right side of the Vortec. I heard it when I test drove the the 2004 RV in 2015, however, I stupidly assumed it was a donut leak. Last December, I went to replace both and discovered that there was no evidence of gasket deterioration. It was then I realized the real problem. I couldn't id the exact location of the leak (near the rear of the right manifold), but decided not to tackle this due to the tight quarters and risk of breaking studs. So, I installed sound insulation and hoped for the best. It's loudest when I first crank the engine, but mellows out once warm. I've gotten more used to the sound now.
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Old 07-03-2016, 07:11 PM   #10
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The leak can mess up the O2 output so it is best to fix it.
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