I am in the middle of an alternator replacement. Any advice to separating the old alternator from the fan? I do not have access to a press so thats out. I really don't want to bash the crap out of it


Help!

Rod,

 

this comes up pretty regularly . After the woodruf key is out I think the consensus is to work your way around tapping it at the back with a hammer and a block of wood till it starts to work off the shaft .. you could heat it up a little with a heat gun too , that may help.. Oh and when you get it off , there is a guy on pelican who cant remember if there are any washers or spacers bakc there on a Carrera so let him know

 

I used a punch and small hammer. I gently tapped the alternator threaded studs. I working in a star pattern across the alternator to avoid having the alternator get wedged into the housing.

Every few threads, I would try to pull the alternator out of the housing.

 

oh my mistake, i appologize .. i thought the alternator was out of the housing , i just thought he was trying to get the fan off..

 

I assumed he was talking about the alternator-fan housing separation. In my case the fan slid off with no issues. If you need to separate the fan from alternator shaft, then Ice's plan works.

 

Thanks, yup just taking the fan off, shroud separated easy, as did the fan as it turned out, reassemble in the morning(worst part), thanks again,



Rod,

 

Glad it worked out Radcap. Here's a good write-up as well:
911 Alternator & Voltage Reg Removal & Replacement

Let us know how it goes when put back together.

Mark/Pelican Parts

 

"Here's a good write-up as well:
911 Alternator & Voltage Reg Removal & Replacement"

Actually not! The second paragraph of "11" results in damage to the alternator
AND is noted as such in the writeup.


11.)You will now note the "other" three, 8mm head nuts ( that you couldn’t get to earlier when removing the air-duct). These 3 hold the alternator to the cast fan housing . Remove these 3 nuts, noting their location [ that is, whether or not they were included in holding the air-duct funnel. I used this approach: the nut that straddled the regulator centerline DID NOT hold the air-duct funnel. Every "other" nut ( in a staggered, 120 degree pattern) also DID NOT hold the duct. The remaining three DID hold the air duct.

Alternator will likely be "frozen" to the housing. With caution, use a hardwood ( or such) to tap on the 6 bolts to get it out. I even used heat from a hair drier to "expand" the housing, which helped. Patience ! Go in a circular pattern. I used a metal hammer, which worked, but I "flattened" the end of the bolts slightly causing grief when re-installing the nuts.Don’t do this !

The proper procedure is to use a block of wood, e.g. 2X4 or 2X6, and tap
the fan housing on the wood with the alternator facing down. The assembly
is rotated as it's tapped on the wood. The alternator will easily 'fall' from
the housing with a few taps.

 

+1 on patience. I re-install the nuts to protect the threads. Use baby-taps. Persistent, light tapping. That fan shroud is un-Godly expensive, and as rare as unicorn farts.

 

No worries with any of the dis or re assembly as it turns out. All went smooth, thanks for all the input. Now if I can just disassemble again and check the connections.

 

Good all went smoothly with assembly Radcap.

cheers!

 

"I re-install the nuts to protect the threads. Use baby-taps. Persistent, light tapping."

Never a good idea to hammer on ANY Porsche engine parts especially when
a better method exists. Only gas station so-called mechanics (basically
butchers) use hammers on Porsche engines.

Bottom line: Use wise discretion when following explicit engine repair instructions
from postings on the internet!