MajorCommonCooling

Toyota Land Cruiser 100: 2UZ-FE Heater Port Coolant Hose Cracking

2UZ-FE Heater Port Coolant Hose Cracking is a common cooling fault on the Toyota Land Cruiser 100 on the 1998–2007 cars, and we rate it major. Putting it right costs $280 to $750 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 33 documented faults on the Toyota Land Cruiser 100.

Vehicle: Toyota Land Cruiser 100
Engine: 2UZ-FE
Years: 1998–2007
Fuel: petrol
System: Cooling

This page covers the Toyota Land Cruiser 100 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 Land Cruiser 100 faults33 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Intake manifold or Head gasket yet. We would rather show none than show a picture of a different part.

What goes wrong

The 2UZ-FE V8 engine uses a series of small-diameter rubber hoses that connect to heater circuit ports on the underside of the intake manifold. These hoses are subject to continuous heat soak and age-harden over time, cracking at the manifold connection points where they are partially obscured by surrounding components. Coolant loss from these hoses can be rapid and difficult to trace visually without removing intake components. A vehicle losing coolant without an obvious external source should have these hoses inspected as a priority. Sustained operation with low coolant risks overheating and head gasket failure, both of which are expensive repairs on the 2UZ-FE.

What you would notice

Gradual coolant loss without visible puddle or obvious external leak
Sweet antifreeze smell from engine bay particularly after shutdown
Low coolant warning light or reservoir level dropping between services
White vapour or steam from under intake manifold area when hot
Coolant staining or mineral deposits around manifold heater ports

How to check it

Where to look. Underside and rear face of 2UZ-FE intake manifold, small-diameter heater circuit hose connections

With the engine cold, trace all coolant hoses running to the underside and rear of the intake manifold. Look for dried coolant staining, white mineral deposits, or cracked rubber at the manifold connection nipples. Check coolant reservoir level trend across multiple days if loss is slow. If a workshop inspection is possible: A cooling system pressure test held for 15 minutes will confirm any active leak.

Parts involved: Intake manifold, Head gasket.

What it costs to put right

$280 to $750 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

“Have the heater hoses and manifold coolant hoses been replaced?”
“Is the coolant level stable between service intervals?”
“Has the vehicle ever overheated or lost coolant unexpectedly?”

Now check the Toyota Land Cruiser 100 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 published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Toyota Land Cruiser 100 buyer questions

Is 2uz-fe heater port coolant hose cracking serious on a Toyota Land Cruiser 100?

We rate it major and common on the Toyota Land Cruiser 100. The 2UZ-FE V8 engine uses a series of small-diameter rubber hoses that connect to heater circuit ports on the underside of the intake manifold. These hoses are subject to continuous heat soak and age-harden over time, cracking at the manifold connection points where they are partially obscured by surrounding components. Coolant loss from these hoses can be rapid and difficult to trace visually without removing intake components. A vehicle losing coolant without an obvious external source should have these hoses inspected as a priority. Sustained operation with low coolant risks overheating and head gasket failure, both of which are expensive repairs on the 2UZ-FE.

How much does it cost to fix on a Toyota Land Cruiser 100?

$280 to $750 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 Land Cruiser 100 years are affected?

Our research records this fault on the 1998–2007 Toyota Land Cruiser 100. 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.