MajorCommonEngine

Toyota Allion: Excessive oil consumption from clogged piston oil-return holes (1.8 1ZZ-FE)

Excessive oil consumption from clogged piston oil-return holes (1.8 1ZZ-FE) is a common engine fault on the Toyota Allion on the 2001–2005 cars, and we rate it major. Putting it right costs $2,000 to $4,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 13 documented faults on the Toyota Allion.

Vehicle: Toyota Allion
Engine: 1ZZ-FE
Years: 2001–2005
Fuel: petrol
System: Engine

This page covers the Toyota Allion as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Toyota Allion faults13 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph for this fault yet. We would rather show none than show a picture of something else.

What goes wrong

Pre-2005 1ZZ-FE 1.8 engines used pistons with undersized oil-return drain holes that clog with sludge, seizing the oil control rings so the engine burns oil — often a litre or more per 1,000 km once it takes hold. Toyota revised the pistons in 2005, so late T240 cars are far less affected. If the sump is allowed to run dry the engine will spin a bearing or seize; many high-km JDM Allions arrive in NZ with no oil-change history, which is exactly the neglect that triggers it. A proper fix means new pistons and rings, so many owners simply carry oil and top up.

What you would notice

Blue-grey smoke from the exhaust on start-up or hard acceleration
Oil level drops noticeably between services with no visible leak
Low-oil pressure light flickering on corners when the level gets low
Fouled spark plugs and rough running in bad cases

How to check it

Where to look. Engine internals (pistons and oil control rings); check dipstick and oil filler cap at the front of the engine bay

With the engine cold, pull the dipstick and check the level and colour — jet-black, low oil is a red flag. Have someone watch the exhaust while you start it cold and then rev it after a short drive; any blue smoke means it is already burning oil. Look inside the oil filler cap for baked-on brown sludge. Ask for service invoices showing regular oil changes; a JDM import with no history and 150,000+ km on a pre-2005 1.8 deserves a compression test before purchase.

What it costs to put right

$2,000 to $4,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“How much oil does it use between oil changes?”
“Do you have any service records from Japan or NZ showing oil-change intervals?”
“Has the engine ever been rebuilt or had pistons/rings replaced?”

Now check the Toyota Allion you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in the sources below. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them.

Toyota Owners Club forum thread 'Oh that 1ZZ-FE and the spectre of oil consumption'
8020 Automotive '3 Most Common Toyota 1ZZ-FE Engine Problems'
MotorReviewer 1ZZ-FE engine profile
SpyderChat 'Oil Sludge: post-2003 1ZZ-FE Engine Design Modification' thread

Toyota Allion buyer questions

Is excessive oil consumption from clogged piston oil-return holes (1.8 1zz-fe) serious on a Toyota Allion?

We rate it major and common on the Toyota Allion. Pre-2005 1ZZ-FE 1.8 engines used pistons with undersized oil-return drain holes that clog with sludge, seizing the oil control rings so the engine burns oil — often a litre or more per 1,000 km once it takes hold. Toyota revised the pistons in 2005, so late T240 cars are far less affected. If the sump is allowed to run dry the engine will spin a bearing or seize; many high-km JDM Allions arrive in NZ with no oil-change history, which is exactly the neglect that triggers it. A proper fix means new pistons and rings, so many owners simply carry oil and top up.

How much does it cost to fix on a Toyota Allion?

$2,000 to $4,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Toyota Allion years are affected?

Our research records this fault on the 2001–2005 Toyota Allion. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.