There's 2 ways to identify the 1zz. There's a label from the factory on the passenger side of the head. The other way is to look at the certification label on the driver's side door jamb.

The later 1zz from 03-08 has a plastic intake manifold. Not sure about 98-02.

 

Thanks, 75aces. What is/are the other engine model(s) used on Generation 8 Corollas?
Is that plastic intake manifold prone to cracking?

 

No it's not.

I want to say 01 for sure has the plastic intake. The 04 1zz had the oil consumption corrected. 05-08 won't work since it's electronic throttle.

 

Are you in the US? All US 98-02 Corollas will have 1ZZ-FE's. Later ones (roughly 2000 model year on but I can't guarantee the cutover date) will have VVT-i.

Corollas sold around the world could have very different engines (which makes me think you might not be in US).

I have a 99 Corolla with non-VVT-i, burns no oil at all. None.

My wife has a 2006 Camry that needs a quart every 2500 miles. It is VERY hard to justify doing engine work when you can just add a quart every thousand or couple thousand miles.

 

Thanks. I'm in the US.
How many miles are on your 1999 Corolla? 2006 Camry?

 

140K miles on 99 Corolla, 150K miles on 2006 Camry.

Just money wise... if you have an engine that burns a quart every 1000 miles and you drive 12Kmiles a year, that's just $50 a year in oil. Hard to justify much work on a 15-20 year old car even if your labor is free.

If you price your own labor as free and are looking for something you can maintain easy for cheap.... this generation of Corolla has the most widely available and cheapest parts cost of any used car out there.

 

Thanks. Does the burning oil cause any valve or catalytic converter damage?

 

Hard to say. The Camry needed a new oxygen sensor about 100K miles but I don't think it was because it was burning oil. The Camry also got a brand new exhaust last year but that was rust, not catalytic converter damage from oil. Just my opinion: 1 quart every 2500 miles is not bad for a 15-year-old car. But it is in stark contrast with the 1ZZ-FE in the older Corolla that burns no oil at all.

 

When you have to replace the front oil seals, do you also change the timing chain, or reuse the current one? If changing, what interval do you change it at?