Nissan extral head valve inlet tight how does

buy the service manual yet

https://search.brave.com/search?q=Nissan+Diesel+UD+GE13+Torque+settings&source=web

The rocker arms should be the same for Inlet and Exhaust. I can't find any spares supplier that differentiates.

https://www.enginepartsonly.com/1999-nissan-frontier-3-3l-engine-rocker-arm-ra616-35/

To tell which valves are Inlet and which are Exhaust, the exhaust valves are on the side where the exhaust manifold is.

https://www.google.com/search?q=1999+nissan+frontier+3.3+rocker+arms

Heads

https://advcylinderheads.com/nissan-frontier-xterra-pathfinder-quest-cast-owo-vg33-3-3-0-mile-cylinder-heads.html.html

..

Hey Anon,,
This should help..
https://www.engine-specs.net/nissan/fd46.html

The tappet adjustment is 16thou or .4mm for both inlet and exhaust.
Remove the rocker cover.
Turn the engine over till the timing mark on the pulley lines up on the pin in the cover.
Try to move the rockers on no1...if they are loose and four are tight you are on TDC no1 other wise you are on TDC 4
If on TDC one,

From here you can adjust inlet exhaust on one, inlet two, exhaust three.

Turn the engine 360 degrees one will be tight and 4 will be loose...so now you can adjust both inlet and exhaust on 4, inlet on three and exhaust on two.

you should be able to find these on nissan forums

Welcome to FIxYa.com

THERMOSTAT REMOVAL

HINT: Removal of the thermostat would have an adverse

effect causing a lowering of cooling efficiency. Do not remove

the thermostat, even if the engine tends to overheat.

1. DRAIN ENGINE COOLANT

2. REMOVE AIR CLEANER CAP WITH AIR CLEANER

HOSE

3. DISCONNECT ECT SW1TCH CONNECTORS

4. DISCONNECT ENGINE VIRE PROTECTOR FROM

WATER INLET AND RH CYLINDER HEAD

Remove the 2 nuts, and disconnect the engine wire

protector from the water inlet and cylinder head.

5. DISCONNECT WATER INLET PIPE FROM WATER

INLET AND LH CYLINDER HEAD

a) Remove the bolt and disconnect the inlet pipe from the

water inlet.

b) Remove the O-ring from the inlet pip e.

6. REMOVE WATER INLET AND THERMOSTAT

a) Remove the 3 nuts, water inlet and thermostat.

b) Remove the gasket from the thermostat.

INSPECTION

INSPECT THERMOSTAT

HINT: The thermostat is numbered with the valve opening

temperature.

a) immerse the thermostat in water and gradually heat the

water.

b) Check the valve opening temperature.

Valve opening temperature: 80 - 84CC (176- 183 deg f)

If the valve opening temperature is not as specified,

replace the thermostat.

c) Check the valve lift.

Valve lift: 10.0 mm (0.394 inch) or more at 95CC (203 deg f)

If the valve lift is not as specified, replace the

thermostat.

d) Check that the valve is fully closed when the

thermostat is at low temperatures (below 40CC (104CF)).

if not dosed, replace the thermostat.

INSTALLATION

1. PLACE THERMOSTAT IN WATER PUMP

a) Install a new gasket on to the thermostat.

b) Align the thermostat jiggle valve with the upper stud

bolt and insert the thermostat in the water inlet

housing.

HINT: The jiggle valve maybe set within 15 deg of either

side of the prescribed position.

2. INSTALL WATER INLET

Install the water inlet with the 3 nuts.

Torque: 8.0 Nm (80 kgf-cm, 69 inch lbs.)

3. INSTALL WATER INLET PIPE

a) Install a new O-ring to the water inlet pipe.

Thank you for using FixYa.com

Regards, Lee Davidian

Valve might be bent , or valve guid too tight.
you need to ck if valve sliding free , fist.
if there is an adjustment needed on valves , all specs are on the hood lable.

check idle control valve/sensor

cyl head torqes.1st stage 29 nm. 2 nd stage 57-67 nm. 3rd stage slacken off 360 cegrees, 4th stage 29 nm. 5th stage 64-74 nm. intake and exhaust valve clearance .38 mm hot setting. hope it goes ok.

Oil leak it can be cylinder head cover gasket,or cover bolts is loose have look cylinder head cover try to tight first if not put new gasket cover.