Excessive rust on the exhaust connection?

Yeah that would bug me too. Here’s mine:
Do I win a prize lol

 

Yeah, you win.

So I'm guessing this is normal even in dry warm climates.

I was just curious, really.

 

2017- purchased in August, but not taken on any salted roads. Just heat discolored only...

 

The truck has trained you. Maximum Overdrive was spot on.

 

Your drive shaft and tranny look oxidized as well- pretty harsh conditions for you guys in NY- cars pretty much have to use marine grade hardware to have pretty nuts and bolts, hu?

 

Yeah pretty much. The way I see it as long as the frame is good, all the other stuff can be replaced relatively easy

 

For comparison here are some photos of my '09 Prerunner with 141k "Florida" miles on it:

 

My 2002 Tacoma looked like that last summer before I sold it too, just surface rust, and it used to be a 65K mile Utah car before I owned it.

 

Probably changed metal composition of the flange and there is some galvanic corrosion going on.

 

Note to self: Tacoma exhaust is not stainless steel

 

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I Think the majority of the piping is stainless, and the cat and muffler cans (maybe muffler internals too,) however the flanges all appear to be just plain ol' carbon steel--and of course the cheap-ass carbon steel welding destroys any corrosion resistance the stainless might have.

Keep in mind too that most "stainless" steel isn't, it is simply stain resistant--if a magnet sticks to it it is not true "stainless"--the exception being "steels" with high cobalt content...

 

Thanks. I think I'll coat those flanges while they're still rust-free.

 

don't lose sleep over it, just enjoy the truck

 

Because of the heat there is not much in the way of coatings that will accomplish much--some may even accelerate the corrosion...

 

Mine might be corroding on the inside for the last 7 months, but it looks good on the outside after about 190 wet Pacific Northwest days in that time.

It was sprayed shortly after purchase and will get a touch up every year or so.

If you spray your brake drums and wheel hubs, it’ll also keep the insides of your wheels from gaining a layer of rust stain over the years.

High temp paint is usually good for a few years, even on exhaust manifolds.

Noticed some rust on a hanger a couple of weeks ago and covered that with rust converter.

 

I had Ziebart protection on mine from the first week. But a few months back I took a gander and found it wasn't doing an adequate job. Several spots were rusting on the frame and several other areas. I spent a day last Saturday, sanding and Naval Jelly to most of the bad spots. Then touched up with rustoleum Rust converter/primer and some high heat stuff on some parts. I barely did anythig to the flanges on the exhaust. Those and what I'm calling the "head pipe" (the first pipe near the engine heading upwards) were rusting beyond anything I would have expected. I plan on reporting those to the dealer next time I go in. Ziebart is Wed. and I wanted to get the major stuff treated and primed before letting them coat over it all. Hopefully it helps. Ziebart won't apply treatment to the exhaust parts, so those will still be bare (rust and all) when I go the dealer. My flanges look not quite as bad as RocTacos in post #41, but still pretty bad. I am in hte northeast, so that's bad. But the head pipe is rusting much faster than the rest of the exhaust pipes. I think that's somewhat normal due to the heat.

 

I think I win the prize. This is the clamp situation on my 2013 taco. This is an old thread but it's helped me to understand (I think) how these pipes are joined. It looks like the clamp with the bolts through it are installed on the pipe behind the flange. Apparently, there is a gasket in there between. I had hoped this clamp was one that attached over the flanges. That would make an easy repair.
Other than cutting and using a sleeve or welding, how are folks dealing with this? I'm not keen on having to replace the up and downstream exhaust bits. They are all in decent shape.

 

Look for a set of replacement flanges from napa if they have them. Cut off the old crap weld on the new parts with new gaskets and bolts. Something like this.

 

If it’s not broken, don’t fix it.

If you keep the truck long enough, the exhaust will grow big loud holes and eventually throw off sparks when it contacts pavement. If everything else still operates at this juncture, you are golden. Replace all the exhaust and drive the truck another 100,000 miles.

 

Napa sounds like a good idea. Those guys always seem to have what I need.
I need to do something. There is exhaust blowing out of that joint. It's going to keep getting worse.
I was just thinking. Exhaust problems are such a thing of the past. My Volvo's all have gone well pat 250K with original pipes and my Porsche will probably never need exhaust work unless I decide to tune it (I won't). The last time I installed an exhaust was on my Ranger about 15 years ago.