360 Anyone ever had their Tubi headers crack at the cylinder head?

The machine shop said they would put it in their oven to “bake it” before decking it (after the weld repairs), but I will be sure to ask the welder if they’re planning on doing that as part of their repair.

 

You’re right. Gaskets and OEM nuts in my cart on @Ricambi America . I’m going to call tomorrow and see if they’ll separate the set of OEM gaskets. The site will only allow a minimum of 8 gaskets.

I can try, but I’m also not the original purchaser. I have the last owners installation receipt from the shop, but not the receipt for the parts themselves.

Sounds like you have some welding knowledge. Do you think there could be any issues with rewelding this?

The welder I found does this all the time on Harley’s due to vibration and flexing.

 

Thanks to all for your suggestions. I ended up going with OEM nuts and gaskets from @Ricambi America. I questioned whether going with a smaller head size and different locking design could compromise strength or longevity. I didn’t find the 13mm’s that difficult to work with. Much easier than most people’s accounts led me to expect. Perhaps it’s because I was removing aftermarket headers vs OEM, or perhaps it was the right combination of wrenches, skinny hands and wrists, telescoping illuminated mirrors, flashlights, and sheets of Kaizen foam and tempurpedic pillows to lay on top of the engine while working from above… but it wasn’t that bad!

 

That’s good to hear! They are stamped and numbered. I reached out to them via IG, and they responded and told me to send my account of the failure and pictures to their main email address. I did so earlier this evening. I’ll be interested to see what they say.
Thanks!

 

Progress update:
* Tubi said the 6 year old headers are out of warranty, but looped in EuroSpares as the original retailer to come up with a solution. They came back with an offer to send them to EuroSpares with the original receipt; they would then send them to Tubi for repair; Tubi would send them back to EuroSpares; EuroSpares would collect payment of $750 and send them back to me. I would be responsible for all shipping charges and duties.

* I opted to have my local contact re-weld the failed seam. $200

* I then brought them to my uncle-in-laws machine shop, which specializes in medium-scale custom fabrication for continuous -production products. He verified that the mounting flange is indeed out of plane. He annealed the repaired manifold for me but recommend I find a machine shop that specializes in manifold resurfacing. He said he could do it for me, but would have to fabricate all the necessary jigs to do so, and find time to get it on an open machine, as many of them run programs 24/7.

* I found a local automotive machine shop that can do the work in a couple of days. I’ll drop it off tomorrow, so I can hopefully have the car back on the road by Friday. I didn’t ask how much because I don’t care.

It’s been a very frustrating 2 weeks waiting on other businesses and business hours to get the car back up and running. It’s my daily driver half of the week, and the downtime kills me.

Hopefully back on the road this weekend!

 

Conclusion: The shop I found had the mounting flange resurfaced and leveled in a matter of hours; $170. I put everything back together with new OEM gaskets and nuts and gave it a go. No leaks; problem solved!
Now, while I was laying on top of the engine installing the top manifold nuts, I discovered that 3 out of the 4 screws in the “pneumatic capsule” had vibrated themselves out of the cover. 2 of them were laying in the valley of the plenum. The 3rd was long gone. The 4th was hanging on for dear life. I’m glad I saw this when I did. I have no idea how long it’s been like this. What symptoms could this have created while it been working itself loose? I haven’t had any error codes or obvious adverse effects. Either way, I put some removable loctite on the 3 original screws, and dremeled down the head of a cap screw of the same thread and pitch complete the set. All secure now. Car sounds, runs and drives great.
Now I’m just wondering if the other side is out of plane too…
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