The Toyota 1NZ-FE is a 1.5 L (1,497 cc, 91.35 cu-in) straight-four 4-stroke natural aspirated gasoline engine from Toyota NZ-family. The 1NZ-FE engine was manufactured on Kamigo Plant since 1999.
The 1NZ-FE engine features a lightweight aluminum block and aluminum cylinder head with two overhead camshafts (DOHC) and four valves per cylinder (16 in total). Compression ratio rating is 10.5:1. Cylinder bore and piston stroke are 75.0 mm (2.95 in) and 84.7 mm (3.34 in), respectively.
The Toyota 1NZ-FE engine has electronic fuel injection system, VVT-i (Variable Valve Timing with intelligence) system on the intake side, ETCS-i (Electronic Throttle Control System-intelligent) and DIS-4 ignition system with individual ignition coil for each spark plug.
The 1NZ-FE engine was redesigned in 2003 due to the introduction of Euro IV emissions regulations. The following changes were made to the engine:
- Piston shape was changed;
- The shape of the exhaust manifold was modified;
- Construction of the three-way catalytic converter was changed;
- Three-way catalytic converter was fitted;
- The 16 tit ECU was changed to 32 bit.
The engine produced 110 PS (81 kW; 109 HP) at 6,000 rpm of maximum horsepower and 143 Nm (14.6 kg·m; 105.6 ft·lb) at 4,000 rpm of peak torque.
The breakdown of the engine code is as follows:
- 1 – 1-st generation engine
- NZ – Engine family
- F – Economy narrow-angle DOHC
- E – Multi Point Fuel Injection
|Layout||Four stroke, Inline-4 (Straight-4)|
|Fuel type||Gasoline (petrol)|
|Displacement||1.5 L, 1,497 cm3 (91.35 cu in)|
|Fuel system||Electronic Fuel Injection (EFI)|
|Power output||110 PS (81 KW; 109 HP) at 6,000 rpm|
|Torque output||143 Nm (14.6 kg·m; 105.6 ft·lb) at 4,000 rpm|
|Dimensions (L x W x H):||–|
|Weight||87 kg (191.2 lbs)|
The Toyota 1NZ-FE has an aluminum cylinder block with five bearing support system and thin-walled cast iron liners. It has a 75.0 mm (2.95 in) cylinder bore and 84.7 mm (3.33 in) piston stroke. The engine has two compression and single oil control ring.
The steel connecting rods for the 1NZ-FE engine has caps that were held by plastic region tightening bolts. The engine is equipped with aluminum alloy pistons, semi-floating type piston pins and low-tension rings (two compression and single oil control ring).
|Cylinder block alloy||Aluminium|
|Cylinder bore:||75.0 mm (2.95 in)|
|Piston stroke:||84.7 mm (3.34 in)|
|Number of piston rings (compression / oil):||2 / 1|
|Number of main bearings:||5|
|Cylinder inner diameter (standard):||75.000-75.013 mm (2.9527-2.9528 in)|
|Piston skirt diameter (standard):||74.945-74.955 mm (2.9506-2.9510 in)|
|Piston pin outer diameter:||18.001-18.004 mm (0.7087-0.7088 in)|
|Piston ring side clearance:||Top||0.030-0.070 mm (0.0012-0.0027 in)|
|Second||0.020-0.060 mm (0.008-0.0024 in)|
|Oil||0.070-0.150 mm (0.0027-0.0059 in)|
|Piston ring end gap:||Top||0.25-0.35 mm (0.0098-0.0138 in)|
|Second||0.35-0.50 mm (0.0138-0.0197 in)|
|Oil||0.10-0.35 mm (0.0039-0.0138 in)|
|Crankshaft journal diameter:||45.988-46.000 mm (1.8105-1.8110 in)|
|Crankpin diameter:||39.992-40.000 mm (1.5745-1.5748 in)|
Main bearing cap bolts tightening procedure and torque specs:
- Step 1: 22 Nm; 2.2 kg·m; 16.2 ft·lb
- Step 2: Turn all bolts 90°
After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.
Connecting rod bearing bolts
- Step 1: 15 Nm; 1.5 kg·m; 11 ft·lb
- Step 2: Turn bolts 90°
Crankshaft pulley bolt
- 128 Nm; 13.0 kg·m; 94.5 ft·lb
Drive plate (A/T) fixing bolts
- 88 Nm; 8.8 kg·m; 65 ft·lb
The cylinder head is made of aluminum alloy which gives it good cooling efficiency. The engine has dual overhead camshaft design with four valves per cylinder. The engine has a pentroof type combustion chamber and cross-flow manifolds.
The 1NZ-FE used Variable Valve Timing with intelligence system (VVT-i) on the intake camshaft. Intake valves are 30.5 mm (1.20 in) in diameter, and the exhaust valves are 25.5 mm (1.00 in). Until 2004, the engine did not have hydraulic lifters, so special valve shims were used to adjust the valve clearance.
|Valve Arrangement:||DOHC, chain drive|
|Valves:||16 (4 valves per cylinder)|
|Valve head diameter:||INTAKE||30.5 mm (1.20 in)|
|EXHAUST||25.5 mm (1.00 in)|
|Valve length:||INTAKE||89.25 mm (3.5138 in)|
|EXHAUST||87.90 mm (3.4606 in)|
|Valve stem diameter:||INTAKE||4.970-4.985 mm (0.1957-0.1963 in.)|
|EXHAUST||4.965-4.980 mm (0.1955-0.1961 in.)|
|Valve spring free length:||45.05-45.15 mm (1.774-1.778 in.)|
|Camshaft cam height:||INTAKE||44.617-44.717 mm (1.7566-1.7605 in.)|
|EXHAUST||44.666-44.766 mm (1.7585-1.7624 in.)|
|Outer camshaft journal diameter:||№1||34.449-34.465 mm (1.3563-1.3569 in.)|
|Other journals diameter||22.949-22.965 mm (0.9035-0.9041 in.)|
Head tightening procedure and torque specs:
- Step 1: 29 Nm; 3.0 kg·m; 22 ft·lb
- Step 2: Turn all bolts 90°
- Step 3: Turn all bolts another 90°
Camshaft timing sprocket
- 64 Nm; 6.5 kg·m; 47 ft-lb
|Intake valve||0.15-0.25 mm (0.006-0.010 in)|
|Exhaust valve||0.25-0.35 mm (0.010-0.014 in)|
|Standard||15.0 kg/m2 (213 psi) / 200 rpm|
|Minimun||11.0 kg/m2 (156 psi) / 200 rpm|
|Compression differential limit between cylinders||1.0 kg/m2 / 200 rpm|
|Oil consumption , L/1000 km (qt. per miles)||up to 0.5 (1 qt. per 1200 miles)|
|Recommended engine oil||5W-30, 10W-30|
|Oil type API||SJ or higher|
|Engine oil capacity (Refill capacity)||
With filter change 3.4 l
Without filter change 3,7 l
|Oil change interval, km (miles)||5,000-10,000 (3,000-6,000)|
|Spark plug||DENSO: K16R-11, NGK: KBR5EYA-11|
|Spark plug gap||1.1 mm (0.043 in)|
Valve clearance adjustment data
Calculate the thickness of new adjusting valve lifter so valve clearance comes within specified values.
R = Thickness of removed valve lifter
N = Thickness of new valve lifter
M = Measured valve clearance
N = R + [M – 0.20 mm (0.008 in)]
N = R + [M – 0.30 mm (0.012 in)]
Valve lifters are available in 35 sizes to range from 5.06 mm (0.1992 in) to 5.74 mm (0.2259 in), in steps of 0.02 mm (0.0008 in).
Example (intake valve):
R = 5.10 mm
M = 0.52 mm
N = 5.10 + (0.52 – 0.20) = 5.42 mm.
|Toyota Fun Cargo||–|
|Toyota WiLL VS||–|
|Toyota Corolla (Axi, Fielder, RunX, Allex)||–|
|Great Wall C10||–|
We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.
Can I please have the clear specs of tightening my 1NZ Cylinder Head, please, please.
According to the specs provide here the cylinder head is torqued down in 3 stages…
Stage 1.. torque all bolts to 22lbs.
Stage 2 turn all bolts 90°.
Stage 3 turn all bolts a further 90°
Send me the price for runx 1.5 1NZ engine please
We are not a trading company
List of cars should include Toyota Spacio (Corolla)
Can I use 15W40 instead of 10w30 ? Regards to the weather here in Mozambique
Want to check the fuel consumption & performance of the 5AFE and 1NZ engine
kindly advise on the type of spark plugs for Toyota corolla runx year 2003.
Great info here.Very commendable. Kindly advise on the proper ignition coils for Toyota corolla 1.5cc year 2005 with a 1nz engine.Thank you.
Is it safe to use 20w 50 oil on the 1nz Fe engine?. I come from a country with tropical weather is that oil harmful to the engine?
thank you so much
Kindly advice on what gearbox i should replace my faulty one on a 1nz fe engine…current cant sense engage D
Help me with the torque specs for Toyota allex 1.5 engine pls
Please suggest spark plug fir Toyota Corolla fielder 2005 model 1500cc
I used k20k11is Okay?
Which type of piston rings should I use for replacement on my toyota corolla runx 1nz-FE
I use 20W 50, high perfomance mineral technology oil on 1NZ ENGINE,
is it alright?
No … specified engine oil is 5w30 or 10w30 ……20w50 is to thick a viscosity and can cause engine damage during cold/warm engine operation.
Oil is a film which resides between your mechanical bits, where clearance exists. 30 thickness oil has an operational thickness of 9.3 to 12.5 cSt ……. 50 thickness oil has an operational thickness of 16.3 to 21.9 cSt…. both at 100 C….the pressures placed upon the oil pump vastly increase as it attempts to deliver oil of a much greater viscosity 20w50 through a system designed for oil of a much thinner viscosity 5w or 10w 30….
Eventually your oil pump will fail under the extreme stresses caused by the thicker oil. Usually the failure occurs at the oil pump driven gear shaft…. a failed oil pump will result in a non lubricated engine….
I am in Southern Africa and I also used 20W50 Castrol in full confidence. thanks for the correction.
I have two questions.
1. what are the recomended spark plugs for Toyota Corolla Runx 1NZ-FE
How often can I change ATF?
How many litres of ATF does a 1nz gearbox take
speed meter installed in 1nzef engine does no show millage rate .their any speed meter which adjust in 1nz-ef engine x corolla 2003
When does the timing chain must be changed? Km(Miles).
my 1nz 1.5 x corrolla 2003 engine is knocking and i change the injector but the problem is same what will i do
What type of fuel high pressure pump to use on Toyota corolla fielder 1nz fe vehicle
Hello I have two questions,I used Castrol MAGNATEC 10w-40 (A) when servicing my Toyota corolla 2001 model vvt-i Japanese import is it ok for my engine? and secondly what engine coolant is right for my car?
Hello, as the admin might be very busy, I will gladly answer your question(s), I’m not an admin, but I know these engines. 10w-40 is a little too thick as the 1NZ-FE takes 5w-30 (Better in the winter) and 10w-30 (Best in the summer), 10w-40 just has a tad bit thicker viscosity, try a little thinner next change, long period of use with the oil you’re using can harm the engine and components over time. The coolant/antifreeze should be Valvoline ZEREX Asian Vehicle Antifreeze/Coolant as this is made especially for (Toyota, Lexus, Scion and others) requiring a red, silicate free Hybrid Organic Acid Technology (HOAT) with a phosphate additive. Basically the additives in the ZEREX, rather than any other coolant, keeps from eating away from your coolant system.
I live in southern africa and the summers are usually very hot. i use 20w50. is 10w30 still suitable for my engine, now over 200000?
I have also had the head sealed because of leackage that was visible around the cylinder head? would it also be the reason of high oil consumption? could it be because of using a highly viscous oil?
Never use heavy viscose oil like that. It will ruin the engine during cold start due to oil pump strain and tight clearances on the engine. Use Toyota reccomend oils!marko
Can I use 0w40 for 1nz motor for winter time?
Which engine oil is good for 1NZ-FE ? Mineral or full synthetic ? if full synthetic is better then which grade ? 5W30 or 10 W 30 ? Thanks
@Reza; The 1NZ-FE is best with any Full Synthetic, if the oil is mainly going to be in the vehicle during majority of the summer, use 10w-30, for majority of the winter use 5w-30. You’re welcome!
I have put 190,000 miles so far on a Scion xA (Toyota iSt) with the 1NZ-FE engine using Mobil 1, 0W-30 full synthetic oil. No measurable consumption between oil changes every 5,000 – 7,000 miles, even with this higher mileage on the odometer. 5W-30 should also work. These engines were not made for oil thicker than 30 weight in operation, and will probably develop significant leaks if oil is used that is too thick. 0W-30 gets you a little better protection from cold starts than 5W-30, but both are the right viscosity at operating temp.
my friend u need to identify where the knocking is coming from, but in retrospect I would change the head and block or if u are willing buy the timing chain rail gears and tensioner and replace
Hi there need to know, what is the meaning of a character that is mention in a sticker before 1nz block, it is mostly mentioned as V,X,R .exp V1Nz…..
At how many kms should the chain kit be changed?
I ended up with a jdm 1nzfe type ’03 after i blew the stock/original 1nzfe type ’99 on my 04 xA. It’s mechanically and visually different as far as the valve cover(the jdm type 03 has rockers, squirters, and egr, and adjustable lashes) and I’m starting to discover that some parts common to both for are very different (i.e. the ignition coils, pcv valve, throttle body gasket). It’s near impossible to find any extensive info on the type ’03, but is there a parts list with the part numbers available somewhere? I’d rather have that than buy a part for a 2004 scion xA only to realize it doesn’t fit the jdm engine.
Please help lm looking for oil pump 1NZFE for Toyota SIENTA
exchast pipe size ?
I used 1nz-fe for my vios in Thailand. The toyota company given the fuel with 91 gasohol for standard. Do you know can i fill my tank with e20 or e85. Thanks
(91 gasohol). it means octane 91 by ethanol 10%. Can 1nz-fe use e20 or e85?
What is the best and suits Engine Oil for 1NZ IST 2007? I am in Tanzania
The Toyota 1NZ-FE is a 1.5 L (1,497 cc, 91.35 cu-in) straight-four 4-stroke natural aspirated gasoline engine from Toyota NZ-family. The 1NZ-FE engine was manufactured on Kamigo Plant since 1999 for 10w30 engine oil.
Can I use the 15330-21011 in place of the 21011-0340 vvt solenoid on a 1NZFE toyota engine?
Thanks for the insights on 1NZ engine
guys how can i reduce fuel consumption for 1NZ -FE engine currently doing 11.5 km per litre
which spark plugs should i buy for toyota allex 2001 1NZ-FE
Good day! I would like to inquire about the computer box of my bB ( 1NZ-FE).My vehicle stalled and was diagnosed to have a defective computer box. It was replaced by a 2NZ- FE. Will there be any defects if the latter computer box was installed rather than the 1NZ-FE? My check engine light has been on ever since the change happened. Hope to hear from you so that I can get a replacement if ever!