Our Manzo manifold failed today after less than 1,000 miles. The pipe for the waste gate broke off (see pics). Our set up: the waste gate had a short down dump pipe and was exhausting to the ground near the firewall. For about half of the 1,000 miles this down pipe had no support, so I am guessing that the unsupported weight of the waste gate and pipe vibrated and caused the failure?
I am attempting to get a refund, but I have some questions:
1) Has this happened to anyone else? I did a quick search and couldn't find anything.
2) What manufactures do people recommend for a quality product.
3) Do people using a dump pipe like ours provide any significant support to avoid failures?
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Why did Exhaust Manifold Fail?
- hotbox240
- Knows Some Stuff About 240's!
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Re: Why did Exhaust Manifold Fail?
I had a Phat KA-T manifold crack on me years ago in a similar fashion. Having the wastegate recirculated back into the down pipe definitely gives it more support.
12.43 @ 115.06 - 05/2010
12.28 @ 117.61 - 08/2016
12.28 @ 117.61 - 08/2016
Re: Why did Exhaust Manifold Fail?
A lot of folks weld extra bracing and make use of flex sections to eliminate any excess stress on the manifold and avoid an event like this. A lower cost item will use thinner-walled pipe and may not be as thought-through when it comes to stress concentration and preparing for repetitive heating/cooling cycles - increasing the risk of cracks. Sorry to see this happen to you!
R.I.P. 1990 Red Hatch - DOHC 5 speed // CP 9:1 - Eagle Rods - Clevite - ARP // Holset HX35 - 20psi daily - MSPNP2
8-bit wrote:You could spend your life building a ladder to the moon, or work for 5 years to pay for a trip.
Re: Why did Exhaust Manifold Fail?
I have had this issue happen to me twice with cheap eBay manifolds. I welded them back up and braced. They never failed again.
12.96 @ 116.36 - 2.1 60ft - 11/2011
13.1 @ 114 - 2.3 60ft - 8/2012
KA24DE-T
Build thread/Blog
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13.1 @ 114 - 2.3 60ft - 8/2012
KA24DE-T
Build thread/Blog
YouTube Channel
Re: Why did Exhaust Manifold Fail?
Same exact thing happened to me also with my Ebay style manifold withing the first 1000 miles. I also re welded mine, braced it and it never cracked at that position again.
Project - Aries 8.8.1, Crower pro series rods, Kelford 272, 11mm head studs, Five0 2150cc, Magnafuel-4303, PTE6466
Daily - 95 stock block, ARP's, bigger ring gaps etc, 57Trim/63A/R, 550cc, z32 Maf, 93 octane /110 octane maps.
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Daily - 95 stock block, ARP's, bigger ring gaps etc, 57Trim/63A/R, 550cc, z32 Maf, 93 octane /110 octane maps.
Follow me on Instagram @Prep_40oz