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Off road coolant reroute.

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Old 01-11-2009, 04:20 PM
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"TTT"?

Your idea seems fairly sound. The cursed water plug is going to flow less coolant than stock while the thermostat is closed, but it's still an optimum location to be taking the bypass from. I don't see any major problems.
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Old 01-11-2009, 04:25 PM
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Originally Posted by Joe Perez
"TTT"?

Your idea seems fairly sound. The cursed water plug is going to flow less coolant than stock while the thermostat is closed, but it's still an optimum location to be taking the bypass from. I don't see any major problems.
Let me google that for you

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Old 01-11-2009, 04:43 PM
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Oh, **** of with that thing already.
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Old 01-11-2009, 04:48 PM
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Originally Posted by Joe Perez
Oh, **** off with that thing already.
I couldn't help myself....
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Old 01-11-2009, 04:59 PM
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Old 01-11-2009, 07:12 PM
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Thanks Joe! Thats the simplest Reroute there is!

PS: Looks like the Cursed plug can be drilled out a bit for better flow, not that I would need it but with a little more flow its the perfect reroute design.
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Old 01-15-2009, 04:23 PM
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Originally Posted by IcantDo55
So got my head back from machine shop today and looked at it. I will not have a heater core so how about moving the thermostat to back (like spacerless reroute) and than hoking up the "cursed" water plug to the return line of the heater core that goes back to front of motor. There fore I would have flow and nothing to drill or tap. Seems too easy? What am I missing?


I'll tell me what I'm missing... the ECU temp sensor. Where can I put that.

I'm going to get some black pipe and thread it inline, should be good.

What thread is this plug? I can't find it anywhaere. The green 2 wire sensor.

Thanks!

Last edited by IcantDo55; 01-15-2009 at 04:48 PM.
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Old 01-15-2009, 11:17 PM
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Anyone?
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Old 01-15-2009, 11:36 PM
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The ECU temp sensor (green two-wire) is M12x1.5
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Old 01-15-2009, 11:43 PM
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Better question: Where in the world do you buy metric taps that big? I need one as I need to reinstall my coolant sensor. I drilled and tapped the old hole 3/8 NPT for a GM sensor. And now my gauge inside don't work.
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Old 01-16-2009, 12:05 AM
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Originally Posted by patsmx5
Better question: Where in the world do you buy metric taps that big?
I get mine from Al Harrington's Wacky Waving Inflatable Arm-Flailing Tube Man Emporium and Tool Store.

(j/k)

$6.95 from Enco Tools: Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies
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Old 01-16-2009, 12:10 AM
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My dad thinks he got his in a kit from Home Depot, it's Vermont American. He's had it for quite a while so I don't know if they still carry it.
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Old 01-16-2009, 12:10 AM
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Originally Posted by Joe Perez
I get mine from Al Harrington's Wacky Waving Inflatable Arm-Flailing Tube Man Emporium and Tool Store.

(j/k)

$6.95 from Enco Tools: Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies
Two things. One, that's not a tapered piece. And I would think the factory sensor was a tapered fit. IE-pipe tap. Like my GM sensor I installed was 3/8 NPT.

Second, there's no way that 12mm is the correct size. Unless it's a 12mm BPT (maybe?) that when you tap it and screw something in, the ID is 12mm, similar to how pipe taps are rated in the US system.
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Old 01-16-2009, 12:15 AM
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12mm is correct. I took the cover to the hardware store and a 12x1.5 bolt went right in.
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Old 01-16-2009, 12:22 AM
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Well maybe my 99's is different it has 3 wires FWIW. I dunno. If it wasn't so damn cold outside I'd go mike it out. It's just laying on the valve cover.
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Old 01-16-2009, 11:17 AM
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The green plug sensor on the 1.6 is prob not tapered, it had a "crush washer" in it to seal. If it was some sort of pipe thread it would not need that. Heading to hardware store....
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Old 01-21-2009, 02:47 PM
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Ok, Do I really need the coolant going to the EGR and the TB? I'm thinking, out the intake to the oil cooler than to the water pump...ok?

Soon I will post a full thread on the "Lemons budge reroute" Its cheep!
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Old 02-16-2009, 08:14 PM
  #38  
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Originally Posted by IcantDo55
I'll tell me what I'm missing... the ECU temp sensor. Where can I put that.

I'm going to get some black pipe and thread it inline, should be good.

What thread is this plug? I can't find it anywhaere. The green 2 wire sensor.

Thanks!
The temperature sensor will screw into the threaded hole in the back of the head that is just above the outlet to the oil cooler. Just remove the bolt. See the photo on the link.

http://users.telenet.be/miata/images...rear_plug1.jpg

Frank Devocht's full description of how he did it is here

http://users.telenet.be/miata/englis...nt_reroute.htm
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Old 02-17-2009, 02:42 AM
  #39  
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Euen,

That is the back of a 1.8l. IcantDo55 is doing this on a 1.6l which doesn't have the same ports.
Attached Thumbnails Off road coolant reroute.-image010.jpg  

Last edited by TurboRoach; 02-17-2009 at 02:46 AM. Reason: added a picture
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