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Old 07-01-2015, 01:11 AM   #1
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Default Turbo Miata lit on fire while driving

Was doing a pull and a cloud comes from the engine bay. I quickly pull over and it is on fire. I have a blanket and extinguisher in the trunk. The blanket didn't put it out so had to use the extinguisher.

The eBay fitting adapter from the oil feed line to turbo snapped in half and sprayed oil all over the manifold.





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Turbo Miata lit on fire while driving-80-11694803_918056978256270_8222802617742962883_n_c7a533046d604f17721b604e7279b1285bde3486.jpg   Turbo Miata lit on fire while driving-80-11028015_918056981589603_8196193066677019460_n_da18353b3db493982ec4354fa1129ec7a01d6053.jpg  

Last edited by Grey Vw; 07-01-2015 at 12:36 PM.
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Old 07-01-2015, 08:33 AM   #2
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the exhaust leak at the turbo probably didnt help either.
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Old 07-01-2015, 09:59 AM   #3
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Wow that's a bummer. Glad it didn't burn to the ground
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Old 07-01-2015, 10:06 AM   #4
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Why I carry an extinguisher in all my cars.
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Old 07-01-2015, 10:39 AM   #5
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Quote:
Originally Posted by Braineack View Post
the exhaust leak at the turbo probably didnt help either.
Exhaust leak?

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Originally Posted by 18psi View Post
Wow that's a bummer. Glad it didn't burn to the ground
Nothing was permanently damaged. Just a new fitting and it should be good to go.

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Why I carry an extinguisher in all my cars.
Genius
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Old 07-01-2015, 11:08 AM   #6
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This is also why I don't use any cheap AN fittings on my cars. Saving a few bucks to me is not worth the risk of having my car catch on fire.
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Old 07-01-2015, 11:14 AM   #7
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This is also why I don't use any cheap AN fittings on my cars. Saving a few bucks to me is not worth the risk of having my car catch on fire.
Learned it the hard way. Vibrant fitting ordered.
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Old 07-01-2015, 11:32 AM   #8
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Weirdly, I don't usually consider Holly / Earl's to be a source of "cheap" AN hardware- I've used a lot of their stuff in the past and never really had any quality issues.

Was this one of the cast & machined aluminum 90 AN-to-pipe-thread adapters? Any pictures of the failed part?
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Old 07-01-2015, 12:15 PM   #9
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With real AN fittings (see aircraftspruce.com), you always get your choice of steel or aluminum. On aircraft engines (the ones with gigantic pistons that cause vibrations akin to Hustler's bike seat), steel is used for anything carrying combustibles that is screwed into the engine itself. This doesn't seem to be the rule with automotive engines, but it's something to consider and definitely offers more fatigue resistance to vibrations.
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Old 07-01-2015, 12:35 PM   #10
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Quote:
Originally Posted by Joe Perez View Post
Weirdly, I don't usually consider Holly / Earl's to be a source of "cheap" AN hardware- I've used a lot of their stuff in the past and never really had any quality issues.

Was this one of the cast & machined aluminum 90 AN-to-pipe-thread adapters? Any pictures of the failed part?
Oops, sorry. Edited it. Earls was used on my oil feed on the engine block. It was indeed a chinese fitting. Pics later today.

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With real AN fittings (see aircraftspruce.com), you always get your choice of steel or aluminum. On aircraft engines (the ones with gigantic pistons that cause vibrations akin to Hustler's bike seat), steel is used for anything carrying combustibles that is screwed into the engine itself. This doesn't seem to be the rule with automotive engines, but it's something to consider and definitely offers more fatigue resistance to vibrations.
Makes sense. Hustler
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Old 07-01-2015, 12:41 PM   #11
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<p>+1 for steel fittings for oil lines.</p><p>I plan to go steel on the water fittings at the turbo as well.</p>
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Old 07-01-2015, 01:01 PM   #12
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Originally Posted by Grey Vw View Post
Exhaust leak?
the black soot on your hood suggests a prolonged exhaust leak.
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Old 07-01-2015, 01:05 PM   #13
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Quote:
Originally Posted by hornetball View Post
With real AN fittings (see aircraftspruce.com), you always get your choice of steel or aluminum. On aircraft engines (the ones with gigantic pistons that cause vibrations akin to Hustler's bike seat), steel is used for anything carrying combustibles that is screwed into the engine itself. This doesn't seem to be the rule with automotive engines, but it's something to consider and definitely offers more fatigue resistance to vibrations.
I bought Cheap Summit fittings on my build.

I'll never do it again. Next time I'll check out your link. I agree 100% for steel fittings, I now hate aluminum AN fittings big time....
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Old 07-01-2015, 01:14 PM   #14
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Quote:
Originally Posted by Braineack View Post
the black soot on your hood suggests a prolonged exhaust leak.
I wondered why he thought that until I went back and looked. Once I noticed it, it was like finding the hidden object.

Very good observation, Braineak.
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Old 07-01-2015, 01:16 PM   #15
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Quote:
Originally Posted by patsmx5 View Post
I now hate aluminum AN fittings big time....
Aluminum is lightweight and perfectly fine for the other end of a typical flexible line though (the end mounted to a component on a chassis or firewall for instance). Everything has its place.
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Old 07-01-2015, 01:19 PM   #16
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Quote:
Originally Posted by Braineack View Post
the black soot on your hood suggests a prolonged exhaust leak.
Or an engine fire resulting from large amounts of oil spraying onto the exhaust manifold under pressure.
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Old 07-01-2015, 01:33 PM   #17
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Quote:
Originally Posted by Braineack View Post
the black soot on your hood suggests a prolonged exhaust leak.
You are right, but that black soot was already there. Before the turbo I had a severely cracked stock manifold. ^that too

There was no signs or smell of exhaust under the hood in the days prior.

Last edited by Grey Vw; 07-01-2015 at 03:17 PM.
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Old 02-02-2016, 09:07 PM   #18
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I dunno this seems like normal operation to me
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