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Discussion Starter #1
Hey all, been pretty quiet on the board for quite some time, but I need some ideas here as I'm just fresh out of one to finish up my project.

For those of you who have 1UZ's in your car, would you be willing to post some photos of how you modified either stock or aftermarket exhaust manifolds to deal with the interference of the steering column knuckles? And, if there's a header that you've found works without any mods to it, would you pass that info on to me? I'd sure appreciate it! Its the only thing holding me up at this point, and I'm not finding any info online on what folks have used.

Some info that might be important, I have two types of log-type manifolds now, and the #7 pipe is in the way of the steering knuckle. I believe the manifolds I have now are from an early 1UZ, as well as either a 2UZ or 3UZ (they came with the engine, so I don't know what they're from).

The passenger side fits fine, and with some new steering lines, should not interfere with anything at all, but that damned driver's side, well.....

Chris
PFA


http://kolohe.net/stuffs/mkii/photos/IMG_20170909_174611.jpg

http://kolohe.net/stuffs/mkii/photos/IMG_20160607_112935.jpg
 

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Mike, supersubs on the forum, has extensive pix of his build in his build thread.

Perhaps you could get some ideas from him. IIRC, he modified some kind of OEM "tube header", but it's been a looong time since I read his entire thread!

- Jim
 

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Discussion Starter #4
Thanks Jim, yep, Mike O'Brien's car is fantastic, but his 1UZ is turbocharged so i can't really use his layout for the manifold as he's brought the driver's side around the front and over to the turbo on the passenger's side.

Seems to be what I'm finding with many builds online, most of them are turbocharged, and the few that aren't, there's no photos or good info on what the builder used for the manifolds.
 

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Wow, welcome back man, its been eons! This still the same car as back in the day with the 6m with Greedy bits?

A lot of people end up making custom headers for this swap unfortunately. I've done a little custom header work myself. If you could find some aftermarket tube headers that at least cleared the frame rails, it probably wouldn't be that hard to modify them to clear the steering knuckle with a mandrel J bend in the right diameter.
 

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I researched this as much as I could also, to see what I'm in for when doing the swap. I read that the LS400 manifold is the easiest to modify to fit, but I've also read that the Tundra/Sequoia stock manifold is tight against the block and MAY work, or be easy to mod to work. I've tried getting one, but have been skunked in my 2 attempts in the U-pull-it yard so far (first one had nuts too rusty to get a socket on, second one it was already gone!).
 

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Discussion Starter #10
Hey Mutant, close enough! I'm in Nampa off of Victory by the airport!

I'm gonna go through that link this weekend when I have some time to sit down and read, thanks for that link!
 

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Discussion Starter #11
Yep, its been a while Suprafiend! And yes, its the same car with the old Greddy/HKS 6m setup! Sadly, the shop I used waaaaaaay back when I initially put the engine together screwed up when he sleeved #3 cylinder (it had a small rust spot that didn't come out when he honed the block). The sleeve went in crooked and there was nothing I could do to repair the block when I went to rebuild it a couple years ago. That's why I decided to go with a 1UZ swap, the other block needed to be replaced and the HKS pistons/rings were done.

Good to see familiar names on this board still around!



Wow, welcome back man, its been eons! This still the same car as back in the day with the 6m with Greedy bits?

A lot of people end up making custom headers for this swap unfortunately. I've done a little custom header work myself. If you could find some aftermarket tube headers that at least cleared the frame rails, it probably wouldn't be that hard to modify them to clear the steering knuckle with a mandrel J bend in the right diameter.
 

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....but I've also read that the Tundra/Sequoia stock manifold is tight against the block and MAY work, or be easy to mod to work. I've tried getting one, but have been skunked in my 2 attempts in the U-pull-it yard so far (first one had nuts too rusty to get a socket on, second one it was already gone!).
Looks like there are tons of them on ebay for not a lot of money? Its seems like 40 buck to save your knuckles and your time would be worth it. Looks like you can also buy a set of Chinese headers for not much more either.
 

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Discussion Starter #13
Yep, that's kinda what I've found too, but its incredibly tight at #7 cylinder that I'm hoping to find something else that works a bit better for modifying it. There was a set of tundra manifolds on ebay about a week or two ago, but I couldn't see spending $120 for the set when I think I could find one in the junk yard for less than 50 bucks.

As for the rest of the swap, its really not that bad, actually! There's several trans adapters out there to choose from, and the motor mounts can be found at a few places online too. Wiring can be a royal pain, but if you have everything from a donor, its relatively simple.

As usual, I always have to be different/difficult, so I'm going a different route with wiring and a few other things, but this header issue has me stuck, and as you know, we don't have many choices for shops here that are capable, and willing, to build a custom header for the 1UZ!

I researched this as much as I could also, to see what I'm in for when doing the swap. I read that the LS400 manifold is the easiest to modify to fit, but I've also read that the Tundra/Sequoia stock manifold is tight against the block and MAY work, or be easy to mod to work. I've tried getting one, but have been skunked in my 2 attempts in the U-pull-it yard so far (first one had nuts too rusty to get a socket on, second one it was already gone!).
 

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Yep, its been a while Suprafiend! And yes, its the same car with the old Greddy/HKS 6m setup! Sadly, the shop I used waaaaaaay back when I initially put the engine together screwed up when he sleeved #3 cylinder (it had a small rust spot that didn't come out when he honed the block). The sleeve went in crooked and there was nothing I could do to repair the block when I went to rebuild it a couple years ago. That's why I decided to go with a 1UZ swap, the other block needed to be replaced and the HKS pistons/rings were done.

Good to see familiar names on this board still around!
do you mean the rebuilder's honing tool head went in crooked? I wouldn't expect anyone to actually put sleeves in an iron block, unless it had been horribly damaged previously.
 

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Discussion Starter #15
do you mean the rebuilder's honing tool head went in crooked? I wouldn't expect anyone to actually put sleeves in an iron block, unless it had been horribly damaged previously.
Yeah, to the point that when I pulled the piston out of the cylinder, I found this:



So the block was bored crooked, sleeve honed into place, and because it was a 6m (3.0litre), there just wasn't enough material to bore it straight then sleeve it again. Basically a trashed 6m block.
I really didn't think it was bad, there was some spot rust in just #3 cylinder when I got the engine, but the shop said they really needed to sleeve it, there was one spot that was pitted deep enough to not be able to hone it out completely. I dunno if they were b.s.'ing me, but I had it done anyways just because I trusted the advice from the shop. My bad!
Funny how well the car ran like that though, but I ultimately killed the engine because of a failed fan relay! Overheated it and cracked the piston ring lands.
 

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Dang!

The 6m has the same bore as a 5m though, 83mm. The HKS gaskets actually have the cylinder hole spacing at 86mm, but I personally would never attempt anything over 85mm. Some may say thats pushing it too, but should be fine on an NA engine.
 

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I went with the ebay 2uz stainless steel headers. On the passenger side it fit nicely, although I did hammer in the firewall a little so I could push the engine back a little bit more. The drivers side is another story. I took the car to a fab shop here in town that normally does circle track cars, and had the header modified to clear the steering linkage. Easily the most expensive part of the whole swap. He cut it up and tig welded new tubes. This is how it looks today.



And Hey Flyin' Hawaiian you wont believe this, we are practically neighbors. And we used to have 6m's. And we have 1uz MKII's
 

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Here in South Africa they make these narrow custom manifolds.

They sell for around 290 usd






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