100 Series Exhaust Manifold/Header Quick Tips

[@richardsauer599]

Thanks for this video. The Marco sockets you speak so highly of are called Non Slip sockets. This will help anyone trying to search.

[@richardsauer599]

Ugh, Matco.

[@TheShooter466]

Thanks for making these, picking up an 07 and find the 100 series content helpful!

[@sullivanse]

Thanks for doing this video, I need to do this job on my 4Runner with the 4.7 but my truck was in the Northeast for a while and I know I'm going to break some of those manifold bolts.

[@OTRAMM]

I just go ahead and order all the studs and nuts ahead of time. I've yet to be able to reuse all of the studs and the nuts are one time use anyway.

[@sampsontim08]

It should be noted that the LX/LC shown in this video has had AHC removed. There is even less room if you have factory AHC system in place. Thank you for the video!

[@OTRAMM]

I never thought about it, but I don't think I've had to do manifolds on an AHC truck.

[@sampsontim08]

@@OTRAMM Avoid at all costs with older vehicles especially. Unless you can also sell an AHC removal. images.app.goo.gl/R5d1Njc5LsCBboYV7

[@OTRAMM]

I hate doing manifolds/headers on the 4.7. access is terrible and the hardware is usually seized solid. AHC would make it so much worse.

[@EatSleepDrive]

Rough ballpark how long does this take you to do?

[@OTRAMM]

It depends on how rusted the studs are. Anywhere from 6-13 hours.

[@bmlittle]

@@OTRAMM How much does your shop charge the customer? Pending any issues?

[@gulengr5222]

Great video. Thanks Just bought a 2000 lc and prioritizing what to do first 😛

[@tristancarlson4816]

Any tips for the passenger side specifically? Do you still lift the engine? I bought a stubby flex head 14mm and small flex head ratchet for this job, any other tool recommendations besides those sockets? Love the videos! FYI, I have DTs that are leaking from the collector. Not sure why they failed, very disappointed. I think they lasted ~75k miles over 7 years

[@OTRAMM]

The passenger side is the easier side. No need to raise the engine for just passenger.

[@brand1nn943]

I’ve heard people say that you shouldn’t use the provided gaskets and to use the oem ones. Any reason why?

[@OTRAMM]

I've used both with no issue. The thorley one looks to be remflex which is likely better at sealing gaps. They're fragile until heat cycled though. Thorley originally came without gaskets then switched to these. I'm guessing it was to solve an issue so we've been using them.

[@albylam69]

I used oem toyota for the passenger side but now after watching this I'm gonna use the remflex which came with the dt headers on the driver side. Thank you for the advice.

[@saeed2r]

how many hours job is that both side my mechanic is telling me 18 hours ?

[@OTRAMM]

It's going to depend on rust. We usually estimate 13. It could be more though with heavy corroaion

[@paultruesdale7768]

why the doug thorley vs stock? Are they louder ? Or is the design better and they are less prone to fail, my manifolds are very rusty but not sure if they leak on my 2005 with 300,000 miles , Any way to test ? Thanks for all your vids!!!

[@OTRAMM]

Some people want Thorleys. They haven't been around long enough to see if they hold up as long as the stock ones. You'll hear the manifolds leaking at cold start. It'll be a loud ticking.

[@brendanschroeder1862]

Does this actually cause any issues besides it just being annoying?

[@Dudeofdawn]

@OTRAMM I've been told it's not going to cause any issues but it would be nice to know for sure

[@OTRAMM]

It can cause your air fuel sensors to read incorrectly depending on how cracked the manifold is. And it's leaking exhaust in front of the vehicle so it could be getting in the cab.

[@brendanschroeder1862]

@@OTRAMM ahhh like the O2 sensors not reading right? Is it as simple as maybe just putting some JB weld in the crack for the time being

[@OTRAMM]

@@brendanschroeder1862 you can't easily get to the crack. It's under a heat shield. That and JB will just burn off.

[@tristancarlson4816]

In some states, you may not pass the safety inspection. In Massachusetts I believe it’s due to noise. They failed me

[@compaq2441]

Awesome tips. i actually prefer the tips over showing "how to"

[@jcf6597]

I stumbled on your channel when I was researching LC100/LX470's. Great videos, very thorough. Thanks for posting. I have a couple of questions if you don't mind. I'm in Canada and we only have access to the Lexus line of vehicles and am looking at buying a LX470 or LX570 to set up for overlanding and to pull a 17-20 foot travel trailer. Questions about this video; 1. Does a person need to replace any heat shields or be concerned about excess header heat when headers are put on? 2. Are these or any headers worth putting on with respect to long term reliability and performance increase? On your AHC delete video; 1. I'm having a lot of problems finding a good used LX470 up here and was considering a LX570 but was told the AHC on them can be very difficult to remove inorder to put on a lift and problematic if you're running heavy loads which is what I'll be doing, I would appreciate your thoughts on this. Thanks in advance. Jesse

[@OTRAMM]

We usually use the headers as replacement for cracked stock manifolds. I don't know that there's enough power increase that It'd be worthwhile to use them to replace functional manifolds. You loose the heat shields with headers but I haven't seen any ill effects. I've yet to do a 570 suspension so I'm no help there.

[@yuriorlov47]

I have a 2004 gx 470. What is the time to replace the header on the 100 series?

[@OTRAMM]

Depends on crustiness but usually between 10-13 hours

[@yuriorlov47]

@@OTRAMM is this one side or both?

[@OTRAMM]

@@yuriorlov47 both

[@yuriorlov47]

@@OTRAMM awesome that's what I was hoping to hear. Basically a weekend job

[@lukeneave]

Great video but do you put any sealant or anything on the exhaust gasket manifold when you install it?

[@OTRAMM]

No sealant goes on exhaust gaskets.

[@jailbreakoverlander]

look at that red nose these headers are great but your custom exhaust is the tits.

[@OTRAMM]

Yeah, I'm rocking a sinus infection today. Had Crash take my temp with the thermal imaging camera and you can see the hot spots in my face.