What size of socket a have to use to untigth mountian bolt on altenator

Hi, its very simple if you have a vernier caliper then just checkout the exact size of bolts you will need to be installed ..................
Be Happy

the socket will be metric size and it could be European metric which means that the socket size will be one off Asian socket size for example Asian sizing goes 10-12-14-17-19-21 etc where the other goes 11-13-15-16-20-22 etc
if the one you are using is a fraction too big get a socket 1 size smaller
use an impact gun to undo the bolt

what are you asking?
i lost my bolt???
or i can't find a socket tool to fit the one there, metric head size?
you said one is 14mm well that is not the bolt size, its the head socket size.
so i guess your socket set is missing all the other sizes?
10 to 22mm?
what we do is try all metric sockets if stumped.,
it will be one of those.

I'm thinking here that the head of the bolts is not very thick in which case the socket you are using will need some modification. If you look in the socket you will see that there is a small lead in relief and this will only allow the socket to full engage on 1/2 of the bolt head. Place the socket in a vice and use a grinder to grind of the face of the socket until the sides are square across. This will give full contact with the bolt head inside the socket.. Another point, it is unusual to find metric bolts in a USA made engine so check out the other size metric sockets as European metric use 9-11-13-15-16-18-20 mm sizes compared to Asian 10-12-14-17-19-21 mm. in auto production.

you will need a 14 mm wrench a flat head screw driver 3/8 ractchet 12 mm socket short 6 inch and 1 inch extension on the front of the motor is the altenator there is a tensioner on it losen the two bolts on the front of the altenator then with th 12 mm socket turn the tensioner bolt it is on the right side of the altenator you will be looking directly down on it once the belt is loose enough remove then for the power steering pump belt jack car up remove passenger side wheel there you will see a dust cover remove it after its removed you will see the crankshaft pulley to your left there is the pump losen the rear bolt on the pump and then the front one should also have tensioner like the altenator asemble back together in reverse order after you make the intial tension on belt run for about 30 sec to one minute recheck tension.

disconnect negative battery cable. Then remove rubber boot on altenator. Remove nut and cable attached. Unplug and remove wire harness also attached to altenator.
Loosen and remove both bolts holding on altenator.
Remove altenator.
Reverse process to reinstall. Pry on belt tensioner with pry bar and socket to loosen belt and place on altenator pulley after it is installed.
Last reattach battery cable and start vehicle.

I would rate this a 5 in difficulty. If you have a metric socket set, basic hand tools and a supertine belt tool it's fairly easy repair. You can rent a surpentine belt tool at Autozone.

Disconnect the battery
remove the cowling
remove the supertine belt from the altenator pully
disconnect the red wire on the back of the altenator
disconnect the harness plug from the altenator
remove the bolts holding the altenator to the mounting brackets.
Reverse the process with the new altenator and it it's done.
Make sure your battery is charged before you start the engine a low battery can cause damage to your new altenator.

The serpentine belt tensioner / pulley is on the front of the engine, and part of the belt 'routing'.

Its job is to put tension on the belt as it drives the other devices like the power steering pump, water pump, air conditioning compressor.

It is an aluminum casting that mounts with a single bolt to the engine. The pulley is attached to the arm.

There are a few ways to move / pry the arm inwards, thus releasing the tension on the belt for removing/installing: grab on the pulley bolt (15mm?) with a wrench, or some later models have an opening for a 3/8th socket wrench to attach to directly without a socket.

look at engine from front---- left hand side bottom below altenator ,4x 10mm bolts .remove altenator to gain access is only way.3/8 drive socket set with universal .Renew housing as they warp like crazy and make a gasket with a cornflakes box or similar ,i know it has·"O" rings but trust me they leak.use a ball bearing to make the bolt holes in the gasket.

Hey there hardrock,

• Get a 14mm or 9/16" socket and a long handled ratchet or breaker bar.
• Get the belt around all the pulleys except the A/C compressor or Alternator.
• The tensioner pulley is near the Alternator toward the center of the engine. It's on a spring loaded arm. Get your socket on the center nut of this pulley.
• Slowly pull the ratchet toward the center of the engine. The pulley will pivot on the arm allowing you to get the belt on the final pulley.
  
• Slowly release the tension.
  
• You're done

Mike