Throttle Body Disassembly - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 13 (permalink) Old 12-26-2013, 12:27 PM Thread Starter
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Throttle Body Disassembly

Need a little help here guys. @xkreedx is going to be powdering this 3.7L TB for me, but he needs help with disassembly. There is a rod and plastic gear in the unit that needs to be removed so it does not melt in the baking process. Does anyone know how to remove this?



That gear and rod is the same rod that the throttle plate attaches too. There is a spring that's under tension behind that gear which he can relieve the tension but the rod will not pull out. That gear is molded to the rod so removing that is not an option.

@flipper66 mentioned that someone here may have done this before, either @CanyonRider or @ButtonPuncher

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post #2 of 13 (permalink) Old 12-26-2013, 12:41 PM
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post #3 of 13 (permalink) Old 12-26-2013, 01:03 PM
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Leave the gear on the shaft and drill out the screws holding the throttle plate to the shaft. Do so knowing that getting the plate centered again will be a SPITA!!

You need to pull the throttle shaft out and thats how it went in. Be careful as you could damage the plate, shaft and body if not aligned properly and cause it to stick or have a whacko idle.... Very thin feeler gauges come to mind to center it.

You could grind the back of the screws and unthread them (if smashed flat). Usually the screws are swaiged in place so they don't fall out the allow the throttle plate to stick.

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Last edited by Final Impact; 12-26-2013 at 01:06 PM.
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post #4 of 13 (permalink) Old 12-26-2013, 04:59 PM
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Agreed, the ends of the screw threads need to be filed, or cut off to get the screws out safely.

Once the plate is removed, the shaft will still not come out on the 3.7L TB. This TB uses a C clip on the shaft located under the plug on the non-gear side of the TB. Drill a 1/4" hole in the center of the plug and pry it out of the TB casting. Once the plug is removed, you can get a tiny screwdriver down in the casting to remove the C-clip. The shaft will slide out pretty easily from there.

I'm not sure how the bearings will hold up to the heat of powder coating, but there is at least 1 or 2 others that have done this and I think think there TBs are still working.

When replacing the screws for the plate, use lots of lock-tight!!


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post #5 of 13 (permalink) Old 12-26-2013, 05:09 PM
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lol
OP ^^ must want matching powder coat pretty bad to suffer through all that and not just paint it. Its not like it has high heat or gas on it so it should be fine...

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post #6 of 13 (permalink) Old 12-26-2013, 05:17 PM
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I've gotten everything removed but the shaft. I have the throttle plate out and the electric motor that moves the throttle shaft. Thanks for the tip @twowheelin. @asl.lorenzo do you want me to move forward on this?


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post #7 of 13 (permalink) Old 12-26-2013, 05:39 PM Thread Starter
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We'll talk in PMs.

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post #8 of 13 (permalink) Old 12-26-2013, 06:47 PM
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@twowheelin what are you using as a plug when you reassemble after you optimize these?

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post #9 of 13 (permalink) Old 12-26-2013, 07:06 PM Thread Starter
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Wait a minute... Are you the Cordova Motorsports guy? I've been sending emails but no reply.

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post #10 of 13 (permalink) Old 12-26-2013, 08:48 PM
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Quote:
Originally Posted by asl.lorenzo View Post
Wait a minute... Are you the Cordova Motorsports guy? I've been sending emails but no reply.
Yes that's him.

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