I have a 2004 RX330. About 185,000 km (115,000 miles). The plugs and water pump are original. Timing belt was changed in 2013 at 115,000 km. Everything is coming due. I've been reading over lots and lots of threads on performing these jobs. I'd like to gather part numbers and opinions before I tackle this job.

It appears the Aisin TKT-026 kit works the best for my car and includes almost everything needed to change the timing belt and water pump. I'd like to change the cam and crank seals also since they'll be exposed and fairly inexpensive. Does anyone have these part numbers?

The spark plugs replacement looks like it'll be a bigger job than the timing belt. I can't see any leaks from the valve covers. The vehicle burns no oil. (oil changed about every 6000 kms). I don't think I need to change the valve cover gaskets or spark plug tube seals. What are your thoughts on this? I'll change the PCV valve. I know lots of people suggest changing the 3 rear ignition coils. These are expensive if I buy OEM in Canada. Do these fail on age or mileage? I'd prefer to leave all 6 originals in.

I found these part numbers my MattRX:
Spark plug: 90080-91180 x6
Ignition coil: 90919-02246 (Some people like to do the rear three)
PCV valve: 12204-20040
Intake plenum gasket: 17176-20020
Throttle body gasket: 22271-20040

I also found these extra part numbers:
Plenum gasket – Lexus part # 1712720010
Intake flange (gray) gasket – Lexus part # 1711620010
Do I need to change these 2 gaskets? Can't I leave these parts and gaskets in tack when I take the plenum off the car?

Does anyone have any other things I should start pondering while I research this job?

 

Looks good.

Some things for thought:

Thermostat - While there replace the thermostat
Coil connectors - I'd recommend replacing the coil connectors as they get very brittle with age and are very cheap and easy to depin/repin
Fuel injectors - Depending on how DYI you are... clean your fuel injectors and replace the rubber o-rings that will be very brittle - Radiator - Carefully inspect radiator and radiator hoses. IF radiator shows any signs of leakage (likey at your miles) replace it with a Koyorad
Engine air filter - might as well easy and cheap
Vent lines - Replace vent lnes as they will be cracked, very cheap and easy. Do them one at at time so you know where they go.
Throttle body - Clean throttle body
Cleaning - Be sure to clean everything back there well so if leaks arise you know where and how much it is leaking

I did not replace the intake gasket, valve cover gaskets, rear coils, or throttle body gaskets but I'm not really very smart

 

Thanks. Yes some of these were on my mind. I'll add them to my list. My rad has no leaks. Changed oil last week and had the entire bottom guards off. No pink anywhere. Also looked all around it as they always seem to leak where the plastic meets the aluminum, but mine is clean and dry.

Do you have a Toyota/Lexus part number for the coil ignition clips?

 

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It goes very uqick after the first pin

 

Don't replace any ignition coils unless they have damage from oil leaks. If you insist get them here
https://www.amayama.com/en/part/toyota/9091902246

Beware of any "genuine" coils that are marked Denso, OEM is made by Diamond.

 

I don't want to change the coils if I don't have to. Yes I'm scared of all these fake knock off parts. I started buying from Toyota to make sure I was getting OEM.
What and where is the website you listed?

 

Japan, they are legit I've bought thousands in parts from them.

 

Thanks. Glad to hear. Way cheaper than toyotapartsdirect.ca or lexuspartsdirect.ca

 

Most if not always I haven't bought anything from the above in years.

 

Would I need these parts to change the rear spark plugs? Or could I leave these parts attached to the plenum? I would just need the plenum gasket and the throttle body gasket?
Plenum gasket – Lexus part # 1712720010
Intake flange (gray) gasket – Lexus part # 1711620010

Here are the crank and cam seal part numbers:
Front crankshaft seal 90311-40022
Front camshaft seal 90311-38034 (need 2)

 

I leave most everything attached and only replace 17176-20020

 

I like that idea. Keep it simple.

 

Accessory belt part numbers.
Power Steering Belt Toyota 90080-91212
A/C / Alternator Belt Toyota 90080-91239

 

I purchase drive belts at the local dealer they cost less (sometimes 50% less) than at the corner auto parts store.

 

I've been searching for prices all over the place. It's crazy how much the prices vary.