Land Rover Repair: Discovery Coil Pack replacement, broken tower, coil pack

Question

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The text above is a follow-up to ...

-----Question-----
My 1998 Disco is sparking on tower 5 of the coil pack.  There is a large gap on the back side of the tower.  I am going to replace the coil pack but need to know if there are any special things I need to do timing wise.  It looks like an easy swap...unbolt the old one, disconnect the wiring, then bolt on the new one and connect the wires.  Am I missing anything?

Thanks  
Steve
-----Answer-----
Hi Steve,

that's about right.  Here's what LR has to say:

Coil - ignition
$%18.20.4
Remove
1. Remove upper inlet manifold assembly.
2. Disconnect multiplugs from ignition coils.
3. Release ht leads from rocker covers and disconnect ht leads from spark plugs.
4. Carefully manoeuvre ignition coil assembly from between engine and bulkhead.
5. Noting their fitted position disconnect ht leads from ignition coil.
6. Remove 3 screws securing ignition coil to support bracket and remove coils.

Refit
1. Position ignition coil to support bracket, fit and tighten screws.
2. Connect ht leads to ignition coil ensuring they are in the correct position.
3. Carefully position ignition coil assembly between engine and bulkhead.
4. Connect ht leads to spark plugs and secure ht leads to rocker covers.
5. Connect multiplugs to ignition coils.
6. Fit upper inlet manifold assembly.

Best of luck,

JohnMc

Is it possible to only replace one section of the coil?  It looks like there are four sections with two towers on each.  There is a coil on Ebay with a broken tower but it looks like it could be unbolted and replaced.  I was thinking of buying it and replacing the bad tower on mine with one of the good ones from the unit on Ebay. Would it work?  It is cheaper that buying an entire unit.

thanks

Answer
Steve,

I'd stay away from known faulted coilpacks.  I'm not sure if you can perform this and I wonder if you did, would you have problems later on.  Makes more sense to look for a good coilpack (new) and have worry free trouble for the next 5 or more years.  But who knows?  Is it worth the risk?

Regards,

JohnMc