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Air mix actuator assembly help please with part #

djr81
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djr81 Grand Master

djr81

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I realise this has been done before but having disappeared down the rabbit hole I am thoroughly confused.

Most of the old SAU threads have busted photo bucket photos or confuse the mode door (ie where the air goes to) with the mix door (Which controls how hot it is). I have a shiney new mode door actuator (Part #27731-53E00 I believe, photo attached) off ebay in Japan for a half reasonable price.  The mix door is possibly discontinued? (Part number 2773201U00).  Also drawing 27733NA is used for Im not quite sure what but matches other cars.

Can someone please confirm the part number is correct for an R32 GTR, are there other models with the same part and/or where I may be able to find a used one that I can fix?  (Part number 2773201U00) 

Sorry for the dumb questions but someone out there may have done this lately.  I just dont want to tear the console apart only to do half the job.

20200124_063319.jpg

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Duncan Grand Master

Duncan

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Well, I can confirm they are the part numbers for my 32 gtr's vin as well.

Mix door actuator - 27732-01U00

Mode door actuator - 27731-53E00

My understanding (of the impossible FAST diagram section 270) is that part code 27733N is just the actuator, while 27733NA is the actuator, bracket and wiring.

Also, I have a heater box on the shelf and can take some pics if you need. No part number on either actuator to confirm physically though.

Are you just trying to replace both as preventative, or is there a problem you are trying to fix?

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Robzilla32 Mentor

Robzilla32

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Hi

I have removed most of the interior recently and will be replacing both sides including motors. I was able to buy almost all of the parts new but had to source from a few different suppliers.

Assuming that you are wanting to buy the "mix" door motor AKA "blend" door motor which is the one that jams and pumps hot air into the cabin, then I *think* that the part that you are after is 27742-77S60:

SNAG-1072.thumb.png.031c089396e83c066994b97a6c5ce1d4.png

I can take pics of the parts that I have purchased recently later in the week. i think that I bought the above from RHDJapan

Cheers

Rob

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djr81 Grand Master

djr81

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18 hours ago, Duncan said:

Well, I can confirm they are the part numbers for my 32 gtr's vin as well.

Mix door actuator - 27732-01U00

Mode door actuator - 27731-53E00

My understanding (of the impossible FAST diagram section 270) is that part code 27733N is just the actuator, while 27733NA is the actuator, bracket and wiring.

Also, I have a heater box on the shelf and can take some pics if you need. No part number on either actuator to confirm physically though.

Are you just trying to replace both as preventative, or is there a problem you are trying to fix?

The mode door is stuffed as I usually get stuck with air on the windscreen.

The mix door is the same as no amount of fiddling gets the temperature to change.

So its half preventative (On the assumption its not the head unit) and half a fix.  I get sick of it not working properly and just want it fixed.

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djr81 Grand Master

djr81

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14 hours ago, Robzilla32 said:

Hi

I have removed most of the interior recently and will be replacing both sides including motors. I was able to buy almost all of the parts new but had to source from a few different suppliers.

Assuming that you are wanting to buy the "mix" door motor AKA "blend" door motor which is the one that jams and pumps hot air into the cabin, then I *think* that the part that you are after is 27742-77S60:

SNAG-1072.thumb.png.031c089396e83c066994b97a6c5ce1d4.png

I can take pics of the parts that I have purchased recently later in the week. i think that I bought the above from RHDJapan

Cheers

Rob

Rob, If you could confirm that as I cant find a mix door on RHD Japan that would help a heap.

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djr81 Grand Master

djr81

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1 hour ago, GTSBoy said:

With these things it's possible to dismantle, clean and lube and they work again.

That is sort of plan B, notwithstanding I tend to fk things rather than fix them.

The mode door was $120 and thats brand new so if the mix door could be had for anywhere near the same I would be well happy with that.

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Robzilla32 Mentor

Robzilla32

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Sorry, it was actually JustJap but I checked and they don't have it advertised any longer.

Picking up on what  @GTSBoy suggested, another thing you may wish to try is one of the common problems that causes the blend door motor to stop functioning, is poor wiring contact. There is a temporary workaround that involves jamming cardboard behind the plug to keep it in place. There are quite a few posts on SAU about it. Not elegant but it may be worth trying until you can find a replacement or just to isolate the fault.

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djr81 Grand Master

djr81

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Well that's that idea pharked then.

Regarding your order 93813;
Unfortunately the Nissan OEM part ordered has now been discontinued and the manufacturers are unable to supply us. Apologies for the inconveniences.

Inconveniences. So many inconveniences.

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djr81 Grand Master

djr81

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Had a spare (dead) mode door actuator.  Pulled it apart (the hard bit there are the 5 clips you have to release) and had a look.  Basically one of the plastic gears (the one in red) had near on seized on the shaft.  Removed the gear (and the one next to it) Gave the seized one a ream and some lube and will see if it can be bought back from the dead.  Hoping the blend door is much the same.

20200219_082150 2.jpg

20200219_082203 3.jpg

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djr81 Grand Master

djr81

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Spent the morning pulling the mix door actuator out and replacing the mode door. Prick of a job. Mix door appear to have a couple dry joints in it but by god they are tiny. Will resolder and hope like hell it works again.

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djr81 Grand Master

djr81

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Some more, minor progress.  On the mode door the shaft that locates the worm wheel (the driven gear, not the drive gear) is basically 3.5mm.  The next size up drill bit from that was 9/64" but that went straight through the gear.  Anyway went to a 5/32" (Which is a bees dick down from 4mm) and drilled the wheel out.  Remounted it and the gears now turn.  So without knowing how it affects the longevity of the thing I reckon this may be the way to fix your R32 mode door actuator. Hash tag fixie fixie something hashtag.

As for the mix door there looks to be a couple (Atleast) dry joints.  The mix door doesn't appear to have the same material for the worm wheel either so guessing it is just solder that is the issue.

20200222_103846.jpg

20200222_103740.jpg

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