dirty monkey
Member
It is a very common problem found in Direct Ignition Coil to crack. This is not a permanent fix, but it should help your coil last a bit longer.
Tools needed:
Scissors
Heat gun
10mm socket
anti-seize/ wd-40
Items needed:
Heat shrink 1"
New coil pack
You can buy Denso Coil pack cheaper than buying Toyota OEM one, you will approx save 20-50 on each one.

Heat shrink you need

After removing your old coil pack, measure the heat shrink and cut it to size.

After you cut it to size fit it onto the new coil and use the heat gun to shrink it.

The Fit will be tight, i used WD-40 and a little anti-seize to make it easier to remove in the future.
Install all parts and have fun
.
If your old coils are cracked, you can try to epoxy it closed, but you will have to sand it down to fit. You cannot use Heat shrink with epoxy, the size will be to big.
Tools needed:
Scissors
Heat gun
10mm socket
anti-seize/ wd-40
Items needed:
Heat shrink 1"
New coil pack
You can buy Denso Coil pack cheaper than buying Toyota OEM one, you will approx save 20-50 on each one.

Heat shrink you need

After removing your old coil pack, measure the heat shrink and cut it to size.

After you cut it to size fit it onto the new coil and use the heat gun to shrink it.

The Fit will be tight, i used WD-40 and a little anti-seize to make it easier to remove in the future.
Install all parts and have fun
If your old coils are cracked, you can try to epoxy it closed, but you will have to sand it down to fit. You cannot use Heat shrink with epoxy, the size will be to big.