I wonder is there any "fix in a bottle" sort of thing. Like what sometimes folks will use on old junkers to seal a head gasket or the like.

 

@GavinC - I seem to remember your track record with JB Weld

 

Unfortunately no other way. The manifold is surrounded by heatshields. In fact the gasket has a heat shield integrated into it. More than likely the o2 sensor fault is for biased lean. If that's the case, its not your o2 sensor. Its the extra oxygen your manifold is sucking in and getting picked up by the sensor. Land rover sent out an ota update to address the biased lean o2 sensor fault. I feel it was just a bandaid fix to get people out of their warranty period. They knew about the broken exhaust bolts.

In order to see the broken bolts you need to remove the heat shield. Removing them is a bit of a task. You can remove the front half of the shields and lift up a bit to sneak in an endoscope. Any endoscope should be fine. Extracting is best done by welding a nut to them and breaking them loose. They are inconel and a bit hard to drill out. It'll make your drill bit walk. Just had to deal with one where a dealer drilled and they did a bad job and poor guy almost had to buy a new head.

 

take a trip so southern California. I'll take care of it for you 🙂

 

I may have to do that one day.

I saw the butchery on Kraken Defender courtesy of his dealer. Man they did a number on it.

For the moment I'm employing the head in the sand approach. If (and this is a big if) it's only one or two bolts that have snapped off, I may have plenty of happy miles before


If @Adamalli is right it's amazing to think LR have been passing this off as a dodgy O2 sensor for years. The cost of a recall on these would be astronomical.

But one day, and perhaps that day may never come, I may call on you to do me a favor. fix my exhaust manifold. No way no how, I'd be able to do that.

 

I almost wish you hadn't told me this, as it has just made me very angry. I have kept some of my fault records from the gap iidtool. The two I can find both say "P2270-00 - O2 Sensor Signal Stuck Lean - Bank 1, Sensor 2 - no sub type information (A8)". And both of those times and one other I was still under factory warranty and Land Rover replaced the sensors. This all started in May of last year. So I could have had this covered under warranty if they had bothered to ask why do these keep failing. I asked them multiple times why these were all failing in such rapid fashion and there answer was it just happens. I should have come on the forum and asked. It also kills me that in my last visit before my warranty was up I specifically asked if they could look at the bolts for the manifold. They said they did and found no issues. Well we all know that is a lie. I almost guarantee they didn't check because of the amount of labor that would have been involved. I did know that at the time.

Well now I am going to call a local independent repair shop to get a quote on how much it is going to be to fix this problem. I will keep my receipt so when the enviable lawsuit happens I have a record and can maybe get some of my money back.

 

First, thank you for this information. Fortunately thus far I have no indication of an issue (2022 110 SE i6 w/ low miles @ 28k). Is it accurate the part #'s are unchanged for the bolts, and if so, do you have any ideas on a replacement/upgrade in the works? Is it your opinion it's an issue with the metal in the originals or something inherently wrong with the design?

Thx

 

@Saltek Motorsports Do you know if there has been any TSBs or other JLR documents talking about the problem. My local indie service provider has no clue about this and wants to do a lots of other non free diagnostic tests first. Basically he does not believe this is the problem.

 

Try dropping / removing your front engine under skid plate (the big metal piece that says DEFENDER on it). When I did so (to change front differential oil), a broken bolt fell down. That’s similar to how @GavinC diagnosed his - a bolt was jammed in between the edge and empty space and he saw the threads sticking out on his. The bolts are unique looking and only used in that one place.

 

I will take a look this weekend. Not supper hopeful on that though as the dealer had my skid plates on and off a few times since last May to replace the O2 sensors that probably didn't need to be replaced. Also this past weekend I did some off-roading where I had the defender tilted at 21 degree angle nose up with a 17 degree tilt to the right. So any bolt head that came off is probably long gone. Matter of fact I think the off-roading probably knocked one lose and started that rattling.