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Auxiliary belt change NA 1.6 mx-5,Eunos,Miata Mk1

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Auxiliary belt change NA 1.6 mx-5,Eunos,Miata Mk1

Postby flea » Thu Feb 07, 2013 10:50 pm

What you'll need to carry out this job are 10, 12 and 14 mm sockets & spanners. Also a philips screw driver.

First you'll need to undo theses three hose clips.
What ever you do don't remove the top water hose, that can stay on.

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Undo this bolt & set aside.

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Compress either of the clips on this hose, move it into the middle of the hose &
then pull the hose off.

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Now compress either of the clips on this hose & do the same as above so that one end of the hose is removed.

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Now pull off the Air ducting from all three locations where you have undone the hose clips at the beginning. Remove the right hand section from the car & set aside. Now wiggle the left section up & to the left. You'll notice a clip on the back of this section. Just compress the two tabs & pull it away from the ducting & lift this section out of the car & set it aside also.
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These are the sections removed from the car. Now you'll be able to get at everything.
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First you'll need to remove the air con belt.
Now loosen off these two nuts.
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Make sure the slot in this pulley is in line so you can see this nut.
If its not in the right place simply with the car in neutral put a socket on the crank nut & turn until it is.
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Then crack & loosen it off like so.
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Now undo the tensioning bolt so its loose enough to remove the air conditioning pump belt.
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Remove the old belt.
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Now for the alternator belt. Slacken of this bolt.
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Also the other side of this bolt. It can be reached from the side of the engine. It's difficult to get a picture of the other side but this shows its location.
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You now need to undo this bolt.
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Once its slack enough you'll find that it pivots up with your fingers & releases the bolt from the retaining bracket.
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Now you can remove the old belt.
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Fitting the new belts.

Place the new alternator belt on first.
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Now remember the bolt that pivoted. Clip it back into the bracket like so.
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Then tighten the bolt. This is the tensioner for the belt so keep an eye on the belt as you do it up.
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Push down on the top of the belt like this to make sure its taught & not loose.
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Now you need to tighten the retaining nut. This one.
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I find it easier to use a 12mm spanner as shown.
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Now tighten the nut at the bottom of the alternator.
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Now that's done fit the other new belt onto the pulleys.
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Tighten the adjusting bolt so that this belt is taught as before.
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Now you need to lock up this bolt.
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Now the one through the pulley like so.
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Then lock this bolt off too.
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Now you need to feed the left hand section of the air ducting between its fixing point & the top hose.
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Make sure these cables between my fingers are positioned like this so they sit right when the ducting is pushed home.
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Don't forget to fit the cable retaining clip on the back of this ducting section.
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Also push the small hose on shown here. Followed by the air duct next to it.
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Wiggle it around until this bolt hole lines up.
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Fit the clip back on the small hose.
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Feed the 10mm bolt into the hole (I find it easier with a small extension bar) Then tighten to hold the air duct in place.
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Fit the right hand section of air duct. Now tighten up all three hose clips.
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Don't forget to put this last small hose back on.
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Then clip it into place.
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Job done :handgestures-thumbup:


On the 1.8 MK1 and all MK2's and 2.5's the air ducting pipe runs over the top radiator hose, so there is no need to split it, also the alternator bolt will be a multi groove,(MK1 1.6 is a V belt) and the alternator hinge bolt needs to be cracked from the back as the thread is at the front on the alternator itself, where as the MK1 1.6 is a bolt and nut from the front to the back.
Also note that most UK spec cars (MK1's) will not have power steering like an imported Japanese market specification car, and all will also not have A/C unless a SE model.
If AirCon or Power Steering is fitted or both, this belt will need to be removed first before you can remove the alternator belt for changing.
Eunos 1.6 special 1989 with a few added extras
Eunos 1991 1.6
Eunos 1990 1.6 project
Mk2 1999 1.8

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