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Old 07-13-2012, 04:27 PM   #1
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Hey guys i'm Justin. I currently reside in College Station TX and I recently bought a 1994 turbo miata. I dont know who built it but it needs all kinds of work I want to get this thing track ready, but for now I would atleast like to get it autox reliable. Ive been racing since I was a little kid in karts



So I felt a turbo miata fit my bill pretty well

Here is the car



some stuff I have in order for it



I have some over heating issues and from reading this forum for the last week I realize basically the entire cooling system was done wrong
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Old 07-13-2012, 04:48 PM   #2
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Why does it look like it has an AFM from a 90-93? What is the fuel management? If it is the OEM with bandaids, then you need to recirculate the BOV back in pre turbo. Also, get a clamp on that fuel line. That is just asking for trouble.
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Old 07-13-2012, 04:50 PM   #3
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instead of starting a new thread (but I will if I should) I thought I would post up my problems in here with lots of pics and video lol....


first of all I noticed I have bubbles in the coolant res. I noticed this cause when I was driving yesterday I started smelling coolant and so I pulled over popped the hood and I had coolant all over the power steering rack. It didnt over heat but I took that time to go eat. When I came back I had a small puddle. I drove home a few miles away to investigate further but no more coolant leaking... weird. but I did notice the bubbling in the res.

I let it totally cool and noted that when cool the fluid in the res sits perfectly at full. when hot it goes about an inch higher.

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here is what it looks like when I do a completely cold start (you have to turn it up to 1080p to see bubbles


and here is what it looks like after driving for 15 min (also note res is a lot more full)


this is where the temp guage was during the whole ordeal as well

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So when I was looking around for leaks I noticed this

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and this


and this Name:  sooclose.jpg
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so any ideas?
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Old 07-13-2012, 04:55 PM   #4
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Quote:
Originally Posted by rharris19 View Post
Why does it look like it has an AFM from a 90-93? What is the fuel management? If it is the OEM with bandaids, then you need to recirculate the BOV back in pre turbo. Also, get a clamp on that fuel line. That is just asking for trouble.
im not sure what year the afm is. It is running a voodoo box supposedly tuned by begi at 8 psi.

here is the only pic I have at the moment that includes the whole thing. its raining like crazy or Id go take a closer picture of it.

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Old 07-13-2012, 05:01 PM   #5
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I ordered an aluminum radiator and fans since I only have one fan And im overheating after an hour or more of driving.

but I have this problem which makes me think it wont fit when it gets here.



also I have a very very oddly thick looking ic. I was told maybe that was blocking a lot of my air too?



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Old 07-13-2012, 06:03 PM   #6
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The bubbles most likely indicate a failed seal between the head/block. Since failed MLS gaskets on the 1.8s are fairly uncommon, I'm predicting that the engine was overheated pretty severely at one point, and you have a warped head as a result.

The coolant hose and the intake charge pipe being near each other are insignificant.

Consider removing the "heat wrap" on the downpipe/header, heat wrap can lead to more problems down the road. Also, because of the heat wrap, I can't see well enough to figure out what's going on under there

You are overheating because the radiator is not properly ducted - the air is going around the radiator instead of through it. I'm willing to bet that it's more of a problem at highway speeds than in stop/go traffic.

The smoke coming from your downpipe/turbo is exhaust gasses. Something in your exhaust system isn't sealed up properly. May require a gasket. May be loose bolts.
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Old 07-13-2012, 06:23 PM   #7
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you are correct that it seems to overheat on the highway but driving around town its fine.

warped head uggggh

Quote:
Originally Posted by fooger03 View Post
The bubbles most likely indicate a failed seal between the head/block. Since failed MLS gaskets on the 1.8s are fairly uncommon, I'm predicting that the engine was overheated pretty severely at one point, and you have a warped head as a result.

The coolant hose and the intake charge pipe being near each other are insignificant.

Consider removing the "heat wrap" on the downpipe/header, heat wrap can lead to more problems down the road. Also, because of the heat wrap, I can't see well enough to figure out what's going on under there

You are overheating because the radiator is not properly ducted - the air is going around the radiator instead of through it. I'm willing to bet that it's more of a problem at highway speeds than in stop/go traffic.

The smoke coming from your downpipe/turbo is exhaust gasses. Something in your exhaust system isn't sealed up properly. May require a gasket. May be loose bolts.
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Old 07-13-2012, 08:46 PM   #8
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Quote:
Originally Posted by fooger03 View Post
The smoke coming from your downpipe/turbo is exhaust gasses. Something in your exhaust system isn't sealed up properly. May require a gasket. May be loose bolts.
thats what I thought too, but loooking at it closer I think its burning whatever hose is coming out right there. im guessing heater core hose?
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Old 07-13-2012, 09:40 PM   #9
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Welcome. That's quite the head ache there.

Coolant reroute, ducting, what the help is that intake doin in there?

WTF mate
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Old 07-13-2012, 09:44 PM   #10
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got some video of the possible leak location. any ideas how to route that line so it wont make contact with the manifold? lol
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Old 07-14-2012, 08:08 AM   #11
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Welcome, justintime!
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