Monoshock

All the threads on spark plug replacement for the IS 350's seem to be for earlier generations, and I'm not seeing any discussion of 2014+. Am I missing it or am I really the first '14 owner to reach 60,000?
Can anyone confirm there's no difference from the earlier generation? Planning on doing it myself and just want to be prepared. Thanks.

DEMONX

I have a 2014 IS250 (base model), stopped by the dealer the other day to buy spark plugs and they told me sparks plugs get replace at 90k miles. I think that's a little crazy lol

Monoshock

The issue is whether the intake manifold has to be removed to access the driver side plugs. Several folks have said no, but those were earlier models. It appears to block access to the rear most plug, as there's just a couple of inches of clearance. If it is just tough but possible I would rather try than pay for it. Any input appreciated.

Mrg02d

Make sure you let us know the condition of your plugs when you change them. I'm at 52k and would like to hold off if possible!

Monoshock

Sure. It seems from the other threads most think they can wait longer after seeing theirs at 60k.

LeapFrog

REMOVAL PROCEDURE
1. REMOVE V-BANK COVER SUB-ASSEMBLY
2. DISCONNECT NO. 2 VENTILATION HOSE
3. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE
4. REMOVE IGNITION COIL ASSEMBLY
(a) Remove the 2 nuts and disconnect the wire harness from the cylinder head cover sub-assembly.
(b) Disconnect the wire harness clamp from the intake air surge tank assembly.
(c) Remove the 2 bolts and disconnect the 2 brackets from the cylinder head cover sub-assembly LH.
(d) Disconnect the 6 ignition coil assembly connectors.
(e) Remove the 6 bolts and 6 ignition coil assemblies from the cylinder head cover sub-assembly.
NOTICE:
If an ignition coil assembly has been struck or dropped, replace it.
HINT:
Arrange the removed parts in the correct order.
5. REMOVE SPARK PLUG
(a) Remove the 6 spark plugs from the cylinder head assembly.
NOTICE:
If a spark plug has been struck or dropped, replace it.
HINT:
Arrange the removed parts in the correct order.

INSTALLATION PROCEDURE
1. INSTALL SPARK PLUG
HINT:
Perform "Inspection After Repair" after replacing a spark plug.
(a) Install the 6 spark plugs to the cylinder head sub-assembly.
Torque:
18 N·m {184 kgf·cm, 13 ft·lbf}
NOTICE:
If a spark plug has been struck or dropped, replace it.
HINT:
Install the same parts to their original positions.
2. INSTALL IGNITION COIL ASSEMBLY
HINT:
Perform "Inspection After Repair" after replacing an ignition coil assembly.
(a) Install the 6 ignition coil assemblies to the cylinder head cover sub-assembly with the 6 bolts.
Torque:
10 N·m {102 kgf·cm, 7 ft·lbf}
NOTICE:
If an ignition coil assembly has been struck or dropped, replace it.
HINT:
Install the same parts to their original positions.
(b) Connect the 6 ignition coil assembly connectors.
(c) Connect the 2 brackets to the cylinder head cover sub-assembly LH with the 2 bolts.
Torque:
Bolt A :
21 N·m {214 kgf·cm, 15 ft·lbf}
Bolt B :
10 N·m {102 kgf·cm, 7 ft·lbf}
(d) Connect the wire harness clamp to the intake air surge tank assembly.
(e) Connect the wire harness to the cylinder head cover sub-assembly with the 2 nuts.
Torque:
10 N·m {102 kgf·cm, 7 ft·lbf}
3. INSTALL AIR CLEANER CAP WITH AIR CLEANER HOSE
4. CONNECT NO. 2 VENTILATION HOSE
5. INSTALL V-BANK COVER SUB-ASSEMBLY
6. PERFORM INITIALIZATION
(a) Perform "Inspection After Repair" after replacing an ignition coil assembly and spark plug.

4TehNguyen

iTrader: (1)

why would it be different than last gen IS350s which you didnt have to remove the intake manifold. The engine is the same

Mesh704

I did change mine twice !! First time 60k second time 120K .. this the picture of the last time I change them !! I know it's damaged but don't forget my car is full bolts-on + Tune

OEM Denso spark plugs : $160 for 6pc
Labor : only $15 LOL

Monoshock

ok, but what about the intake manifold?

Monoshock

only asking because seeing different opinions and talk of $500 for freakin plug change because of manifold

Monoshock

I appreciate your copy and paste skills but it would actually be helpful if you could tell me where this came from. And the glossary would be good.

39RN

it would appear that this was an excerpt from the service manual. Sans some pictures it tells the method of what you need to do. Good luck!

Mesh704

Yes you need to take out the cold air intake pipe so you can get the spark plugs out easily !!

Monoshock

I know. That's not the intake manifold.

Monoshock

I would want to have confirmation that this is for a 2014. I'm not convinced.