how to replace spark plugs on supra twin turbo

to Replace Spark Plugs on Supra Twin Turbo

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Buy 6 New spark plugs, you have a choice of stock plug or any of your favorite
plug on the market, 

– Here is a list of the most commonly used spark

  • Stock Denso PK20R11, Comes pre-gaped at
    0.043 inch (best on stock supra)
  • Stock NGK BKR6EP-11 (2978), Comes pre-gaped
    at 0.043 inch (best on stock supra)
  • NGK BKR7E (6097), Comes pre-gaped at 0.032
    inch (best on BPU & APU supra)
  • NGK BCPR7ES (3330), Comes pre-gaped at
    0.032 inch (best on BPU & APU supra)

– Also buy 2 crankcase
hoses, Toyota part number 12263-46010 & 12264-46010 (if needed),
if you have not replaced your hoses in a long time, chances are you going to
have a hardened crankcase hoses that will get damaged on removal, its always a
good idea to save new ones just in case you need them one day.

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2) Remove the oil
cap and plug up the hole with a towel so you don’t drop anything down the oil
hole accidentally.

3) With an Allen wrench(5mm) remove the top
cover of the engine, 10 screws. This best done on a cold motor.


4) Remove the two crankcase vent
hoses that run between the valve covers. if they are hard to come off, clamp
them in the middle with pliers and twist the hose.


5) Using a small flat
head screwdriver, release
the wiring harness clips.

6) Disconnect wiring
from the coil packs. two connectors per coil packs.

7) Unbolt the coil packs holders. there
is a 10mm bolt on each side of the coil packs holders. there are 3 coil packs


8) Lift out the coil packs holders. Rock them back and forth if they are hard to come out, that will
help them come loose.

9) Use a deep well 5/8th spark plug socket to
remove plugs.


10) Gap (if needed)
& install the
new plugs (torque it to ~13 ft/lbs). or as shown on the manufacture interactions.


11) Install the coil packs. Make sure they are

12) Connect wiring and re-clip wiring harness to clip. make sure each harness routes *below* the crankcase

13) install crankcase hoses that you
bought (or previous ones if they are not cracked).

re-install cover and cover screws.

Remove towel from oil hole and replace it with the oil cap.


– Damaged your Coil Harness? Click Here


– All You Ever Wanted  to Know About 
NGK Plugs!


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