Question about 2001 Nissan Altima
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Posted on Jan 02, 2017
Dear Guest: If you have some reasonable mechanical aptitude, it is a simple task on this engine to do.
The thermostat is located near the front to the engine (the side closest to the belts) and on the side where the radiator is.
Follow the top radiator hose to the engine and you will have found the thermostat housing.
1. Make sure the engine is cool before doing this job.
2. Get a drain pan and drain the coolant from the radiator. The drain **** for the radiator is located at the bottom of the radiator. Some have an end which can be turned without tools and others require a flat screw driver to unscrew the fitting from the bottom of the radiator. Make sure you remove the radiator cap, as it will drain much faster. Once drained, put the drain **** back into the radiator. Be careful and DO NOT OVER TIGHTEN IT! It will snap off in the radiator!
3. Release the hose clamp which secures the hose to the thermostat housing and then grasp the hose at the neck where the clamp was and try to rotate the hose on the housing. DO NOT try to just pull the hose off. Break it loose first by rotating it on the housing. If it is stuck, get a small screw driver and carefully, slide it in between the hose and the housing, working it around until you can rotate the hose. At that point you can remove the hose and push it off to the side or take it loose at the radiator as well. CAUTION!!!!! the radiator tanks are plastic and will break if you are not careful!
4. There are 3 bolts which retain the housing to the cylinder head.
Typically the bolt head size is a 10mm. Using a 10mm socket, rotate the bolts in a counter clockwise direction, removing all three bolts. There are some that did use a 12 mm bolt head size. Most of the time the housing will just come loose. Sometimes, it will stick. If so, a light tap will break it loose. Pay attention as to how the thermostat is positioned in the cylinder head prior to removing it. Most of the time it will pop out easily or you can easily pry it out with a small screw driver. CAUTION!!!!
Do not damage the mating surface where the gasket seals.
Carefully clean the old gasket off. A single edge razor works fine.
5. The thermostat has a top and a bottom. If you look closely, you will see a place in the outer parameter of the thermostat where there is a small hole, often with a little metal tab which projects through the other side and is able to jiggle some. This is a small bleeder to help bleed the air trapped in the system when it is installed. This part of the thermostat must be at the 12:00 position.
Additionally, make sure the part with the hoop is sticking out toward you. The cylinder head has been machined to allow the thermostat to fit flush with it when installed properly.
6. Clean the old gasket from the thermostat housing. Nissan utilizes a liquid gasket sealer (silicon) which you apply a "SMALL" bead around the water inlet (the cylinder head side), let the sealer skin lightly and then put the housing in place making sure that the thermostat had remained seated during the installation. If it had come loose and you try to tighten the bolts, you will crack the thermostat housing.
7. When you tighten the thermostat housing bolts, there is a torque specification however most people don't have torque wrenches which measure in inch pounds. For those who have a torque wrench, 10mm bolts:56.4-66 inch lbs, 12mm bolts 12-14 ft lbs.
I have found that the easiest way to keep from over tightening the bolts is to grab the ratchet from the head and tighten the bolts because you don't have the leverage at that point.
8. Let the silicon dry for 10 minutes and and then fill the system back up with coolant. Reattach the hose and clamp being careful not to over tighten the hose clamp.
If you are replacing it, not more than a 50/50 mix. There is no special bleeding procedure Nissan has for this car. Just fill the radiator with coolant, turn the heater inside the car to the heat position to allow coolant flow into it as well, because it too is part of the cooling system in terms of coolant capacity. I usually fill the radiator until it shows 1/2 way up the tank. As the engine warms up,prior to the thermostat opening, more often than not, the coolant level will rise dramatically before it drops. Once the thermostats has opened top the system off, put the cap on and let it run for a while and watch for leaks. Take the car on a short loop and then recheck for leaks again. If everything has gone well, the temperature will read normal and no coolant will be leaking.
Hopefully this should be sufficient to answer your question.
Posted on Apr 05, 2009
Open up the hood, and go in behind the fixture where the light is located. Sometimes there is an access panel on top. Open it and reach down inside and grab the bulb’s socket. Twist the socket a quarter turn counter clockwise, and pull out the socket. Grab the bulb, and pull it straight out. To replace the new bulb, never touch it with your bare fingers, as this will greatly shorten the bulb's life, if it even work's at all. Use a tissue or something else in that order to handle the new bulb. Push the new bulb into the socket, put the socket back into the housing, and twist a quarter turn clockwise to secure the socket into the fix.Seems that you have to remove the coolant bottle(two screws), and also the unscrew the washer fluid bottle, after that you can reach the socket that holds the bulb. There is a wire that holds the bulb in. if you loosen the screw you can tip up the wire and be careful to leave it in place...also the long side of the wire seems to connect to ground wire for the light...
Posted on Oct 14, 2009
THE 2.4L AND 2.5L ENGINES.YOU HAVE TO SAFELY RAISE VECHICLE SUPPORT IT USING JACK STANDS.YOU HAVE TO REMOVE THE RIGHT HAND SPLASH SHIELD.THEN LOOSEN WATER PUMP PULLEY BOLTS LEAVE DRIVE BELT IN PLACE TO KEEP WATER PULLEY FROM TURNING WHILE LOOSEN PULLEY BOLTS.THEN YOU HAVE TO MOVE AC COMPRESSOR DONT DISCONNECT ANY REFRIGERANT LINES.JUST SET IT ASIDE THE ALTERNATOR AND ITS MOUNT ALSO HAS TO MOVED.THEN YOU ARE AT WATER PUMP.NOW THE 3.5L ENGINE WATER PUMP IS IN A TOUGH SPOT.YOU HAVE TO REMOVE ENGINE SPLASH SHIELD.REMOVE THE SUBFRAME BRACKET FROM THE RIGHT SIDE OF THE SUBFRAME ASSEMBLY. REMOVE THE INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM FROM THE ENGINE COMPARTMENT.REMOVE THE IPDMER UPPER COVER AND HARNESS COVER RELEASE THE TWO CLIPS.DISCONNECT THE ELECTRICAL CONNECTORS AND LIFT THE ASSEMBLY FROM THE CASE.REMOVE THE RADIATOR SHROUDS REMOVE THE DRIVE BELTS.REMOVE THE ENGINE COOLING FAN.REMOVE THE RADIATOR AND THE COOLANT RESERVOIR.REMOVE THE IDLER PULLEY AND THE POWER STEERING AND ALTERNATOR ADJUSTMENT BRACKETS.REMOVE THE FRONT ENGINE MOUNT.REMOVE COOLANT DRAIN PLUG FROM THE WATER PUMP SIDE OF THE ENGINE BLOCK.REMOVE CHAIN TENSIONER COVER AND THE WATER PUMP COVER FROM THE ENGINE FRONT COVER.REMOVE THE CHAIN TENSIONER.PULL THE LEVER DOWN TO RELEASE THE PLUNGER STOPPER TAB.INSERT A STOPPER PIN INTO THE TENSIONER BODY HOLE TO RETAIN THE LEVER IN THE RELEASED.NO CHAIN TENSION POSITION.MOVE THE PLUNGER INTO THE TENSIONER BY PRESSING THE CHAIN GUIDE AND PUSHING WITH A SCREWDRIVER.MAKE A GAP BETWEEN THE WATER PUMP GEAR AND THE TIMING CHAIN BY ROTATING THE CRANKSHAFT PULLEY 20 DEGREES COUNTERCLOCKWISE.REMOVE THE THREE WATER PUMP MOUNTING BOLTS.INSTALL 2 BOLTS SIZE M8 1.25 X 50 MM INTO THE WATER PUMP BOLT HOLES AND TIGHTEN THEM EQUALLY UNTIL THEY BOTTOM AGAINST THE CHAIN COVER.IT WILL BE NECESSARY TO ROTATE THE WATER PUMP SLIGHTLY TO ALLOW THE BOLTS TO DRIVE AGAINST THE REAR TIMING CHAIN CASE COVER INSTEAD OF THE BOLT HOLES.REMOVE THE WATER PUMP.CLEAN THE SEALANT FROM THE MATING SURFACE AND REPLACE THE O-RINGS.INSTALL THE OUTER O-RING WITH THE WHITE PAINT MARK FACING THE FRONT OF THE ENGINE AND THE INNER O-RING BLACK NEXT.APPLY A LIGHT AMOUNT OF OIL TO THE O-RINGS.TIGHTEN THE WATER PUMP BOLTS TO 62 - 89 INCH POUNDS.TIGHTEN WATER PUMP BOLTS EVENLY DONT OVER TIGHT OR YOU WILL DAMAGE WATER PUMP AND HAVE LEAKS.REINSTALL THE POWER STEERING AND ALTERNATOR ADJUSTMENT BRACKETS AND ANY OTHER COMPONENTS REMOVED FOR ACCESS TO THE WATER PUMP.REFILL THE COOLING SYSTEM.RUN THE ENGINE AND CHECK FOR LEAKS.YOU NEED TO BUY THE HAYNES REPAIR MANUAL.SO THE PHOTOS WILL HELP YOU WHEN REMOVING AND INSTALLING WATER PUMP.
Posted on Nov 14, 2009
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