Tightening begi upper and lower downpipes - Leaking - Loosening - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 10-27-2009, 10:55 AM   #21
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yeah yeah yeah. like 3 years later for no apparent reason but to **** me off when i need to drop my tranny.
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Old 10-27-2009, 12:15 PM   #22
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Quote:
Originally Posted by triple88a View Post
did you weld it out of the car and then put it in the car or what?
He welded it off the car and we reinstalled from underneath. I have the advantage of my turbo-> downpipe flange NOT being attached to the actual downpipe, therefor I'm able to worm that bastard back in there. I don't think that would be possible with a solid flange.
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Old 10-27-2009, 02:41 PM   #23
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I ran mine with just the elbow coming from the turbo once the bolt snapped. I must say it was pretty cool hearing the turbo spool, but it sounded like a farm tractor or a small biplane coming in for a landing.
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Old 10-27-2009, 04:01 PM   #24
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Trying to put that bolt in was extremely annoying.

Solution that we came up with was to use a spring from a drum brake that we had lying around. Its been on the car for a while now, and no leaks.
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Old 10-27-2009, 04:04 PM   #25
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Trying to put that bolt in was extremely annoying.

Solution that we came up with was to use a spring from a drum brake that we had lying around. Its been on the car for a while now, and no leaks.
Thats clever...
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Old 10-27-2009, 07:13 PM   #26
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Well i tighten the hell out of it last night, as it warmed up on my way to work this mourning, ppprrrrrrr ppprrrrr pprrrrr > bbbrrrrraaaaaappppppp... rattle.... bbbrrraaaappp... rattle....

Got it welded as much as they could it still leaks a tiny bit on top but i have some magic potion that i will spread all over it once it cools down and hope it seals the damn thing. I'll also toss the clamp on there if it fits between the pipe and the cradle.
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Old 10-28-2009, 05:12 PM   #27
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where is the air vent for the heater and the ac and so forth? when i'm at a stop light it smells like exhaust in the cab.. i honestly feel dizzy right now.
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Old 10-28-2009, 05:15 PM   #28
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do you have your gasket between the firewall and hood?

but it shouldn't smell, fix your leaks.
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Old 10-28-2009, 05:19 PM   #29
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yup that gasket is there, i looked around and could not smell exhaust in the engine bay. Its leaking at the crappy slip joint.
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Old 10-28-2009, 05:23 PM   #30
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It shouldn't leak, like i said I never used any securing device there. Teh design on the joint should prevent leaks. since top portion fits into the bottom section with about a 4" overlap, it's going to be damn hard for the exhaust to leak out. Plus once it gets warm it should expand and get mad tight dawg.

your best be is a slip-joint band clamp and permatex muffler wrap as a sealant beneath it to really solve the issue.
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Old 10-28-2009, 05:31 PM   #31
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4" wtf? mine barely has an inch, maybe an inch and a half. I ripped the bolt when i tried to tighten it more.


When i talked to Stephanie she did say they changed the design so now they are using a 4" bolt instead of the 6" bolt i'm using.
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Old 10-29-2009, 01:31 AM   #32
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The problem i have with mine is my slip joint keeps slipping down. So far it hasnt come off but would make a big problem if it did. Either im going to weld it solid (then i have to take off the manifold every time i want to remove the exhaust) or vband. To me, a weld tack would eventually give way.

If your gonna tack it, just weld it. No leaks garanteed (unless you welded without gas [not flux core])
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Old 10-29-2009, 01:33 AM   #33
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mine is not tacked, mine is welded however its not welded all around since they couldnt get to it from the top. You think i can take it off from the bottom of the car or do i have to pull the turbo to remove it?
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Old 10-29-2009, 01:57 AM   #34
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You may be able too. Try it. You may be able to get the joint low enough to where you can get a full weld around it.
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Old 10-29-2009, 01:59 AM   #35
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i'd do that but i gotta get it to the shop so they can weld it :(
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Old 10-29-2009, 03:29 PM   #36
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Quote:
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I have the older FM kit, which is a begi design. It had a flange and four welded in bolt "studs" around it. IT gave me no end of problems...
Can't blame us for that one sorry. Not Corky's design idea. Better get back with someone else on that.....

BTW - that is the only downpipe I have seen break like that. Chances are you have something pulling on it.
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Old 10-29-2009, 03:33 PM   #37
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My begi downpipe didnt hve enough clearance for me to thread the nut on the bolt more than about a few threads, its still hanging on there but it not tight, Im going to put a spring on it pretty soon
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Old 10-29-2009, 03:34 PM   #38
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Quote:
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4" wtf? mine barely has an inch, maybe an inch and a half. I ripped the bolt when i tried to tighten it more.


When i talked to Stephanie she did say they changed the design so now they are using a 4" bolt instead of the 6" bolt i'm using.
I am sorry I confused you. We use the 6" now. We used to use a 4" bolt, but it is not long enough.

It sounds like the previous owner chopped off part of the downpipe. That explains most of your problems. There is a minimum of 2" on a slip joint. Usually it much longer though.
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Old 10-29-2009, 03:45 PM   #39
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I guess mine's closer to 2", but yeah, that's how mine was installed. i didnt bother with the bolt.

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Old 10-29-2009, 03:49 PM   #40
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