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Old 08-22-2013, 07:24 AM   #1
mr.jadkowski OP
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Stator seized to timing chain cover - Help!

I'm trying to remove my alternator in the process of replacing my timing chain and associated bits, and my stator seems to be seized to the timing chain cover. I've removed the three bolts on the stator housing, and I've released the outer brush from the slip ring (I couldn't get the inner). I've tried using wood and some tapping to gently pry it out, but all it does is break the wood. It seems very difficult to get a good purchase on the stator. I tried using the tabs on the stator housing and it separated the housing from the stator. Are there any other acceptable ways to loosen it up? I read somewhere that heat is a no-no as it affects magnetism. I gave it a little shot of penetrating oil but I'm afraid of spraying that all over the rotor windings and causing an electrical issue.
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Old 08-22-2013, 08:00 AM   #2
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Take some penetrating oil (and use the straw!) all the way around the outer edge. Tap the housing gently with a phenolic hammer (or a piece of wood) working around the outer edge. The piece you are trying to remove has a snug fit but can be rotated slightly to align the mounting screws.

For the brushes, you can reach in with a small screwdriver and lift the brush, then slide a piece of paper between the brush and the rotor so you can pull the housing without damaging the brush.

Be careful and use force gently... the penetrating oil (Kroil is my favorite) and tapping will get it started, then you can gently pry (going around the perimeter carefully!!)

Good luck!

PS You WILL need the special hardened bolt tool to pull the rotor!

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Old 08-22-2013, 08:02 AM   #3
mr.jadkowski OP
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I got the stator out, some light tapping with the end of a breaker bar on the metal tabs that hold the stator seemed to break up the corrosion enough that I was able to pry the stator out with a piece of wood. Now to pull the rotor...
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Old 08-22-2013, 08:08 AM   #4
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Oops.. busy editing my post above....but

You WILL need the special hardened bolt to pull the rotor!!

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Old 08-22-2013, 11:36 AM   #5
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Quote:
Originally Posted by mr.jadkowski View Post
I got the stator out, some light tapping with the end of a breaker bar on the metal tabs that hold the stator seemed to break up the corrosion enough that I was able to pry the stator out with a piece of wood. Now to pull the rotor...
Now clean up the corrosion and apply a thin layer of anti-seize for reinstallation and the next guy will have a lot less trouble removing it.
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Old 08-22-2013, 01:06 PM   #6
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I built a DIY tool out of two hardened bolts and removed the rotor with no issues. Anti-seize on the stator tabs is a good idea, thanks!
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Old 08-22-2013, 04:29 PM   #7
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There is no need to remove the stator from the timing chain cover if your simply replacing the timing chain... so it may not have been moved since it was put on at the factory....
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Old 08-23-2013, 12:10 AM   #8
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Originally Posted by mr.jadkowski View Post
I built a DIY tool out of two hardened bolts and removed the rotor with no issues. Anti-seize on the stator tabs is a good idea, thanks!
When the rotor goes back, clean the tapers well with alcohol. Not so much as a fingerprint on them when you assemble.
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Old 08-23-2013, 12:11 AM   #9
Plaka
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There is no need to remove the stator from the timing chain cover if your simply replacing the timing chain... so it may not have been moved since it was put on at the factory....
How do you get the rotor off?
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Old 08-23-2013, 10:05 AM   #10
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How do you get the rotor off?
With a rotor removal tool.
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Old 08-23-2013, 10:18 AM   #11
Plaka
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With a rotor removal tool.
Rotor can only move outwards .2080" before hitting stator. If it's enough to pop it, you have to leave it captive. Which side does the seal come out?
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Old 08-23-2013, 03:18 PM   #12
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Rotor can only move outwards .2080" before hitting stator. If it's enough to pop it, you have to leave it captive. Which side does the seal come out?
IIRC seal comes out to the front ..

I'll have to look at the stator/rotor .. memory is not what it was? Or it has overflowed

Recalling on road repairs .. your right I did have to take off the stator before rotor removal.
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Old 08-23-2013, 03:26 PM   #13
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Plaka likes to give lots of rope.
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Old 08-23-2013, 03:34 PM   #14
Plaka
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IIRC seal comes out to the front ..

I'll have to look at the stator/rotor .. memory is not what it was? Or it has overflowed

Recalling on road repairs .. your right I did have to take off the stator before rotor removal.

Small hole in metal frame of stator (brushes and holder trivial), big rotor won't fit through hole. But I think your method would work. Leave the stator, retract rear brush and pop rotor free but leave it captive, remove timing chest cover. You just can't do the seal because it's behind the rotor.

I got a stator and rotor in front of me, and a caliper. I wasn't sure either.

Edit--but if you need to heat the cover around the crank bearing....

Plaka screwed with this post 08-24-2013 at 09:55 PM
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