HEAD GASKET REMOVE AND REPLACE ON 98 NISSAN QUEST 3.0 LITER

SOURCE: how to replace blown head gasket

u have to start by removeing ur headers dont forget to take ur blown gasket to ur local part store to make shure u get the rigth one

SOURCE: replacement of a head gasket on 2.5 liter nissan altima 2002

frajogag: First off, be aware that these bolts are "torque to yield" bolts (streach bolts). What this means is that instead of torqueing the head bolts to a specific torque specification, they are torqued down to a set spec and then tightened by rotating the bolts a certain angle, like 90 degrees. and all of them are turned the same amount.
This means that the shanks of the bolts must be checked to make sure they are not too thin (or the bolt has already stretched beyond limits and is prone to snap if used)
Here is how you check the bolts. Measure the bolt using a micrometer, at the base, or within the first 13mm from the end where it threads in. Then go to about 10mm before the threads end heading toward the top of the bolt. There should not be more than a 0.23mm (.0091 inch) or less difference or the bolt should be discarded.
Torque the bolts down to 98.1Nm ( 72.ft lb)
Looking at the head from the side, so you are looking at the full length from side to side, I will number the head bolts in this fashion.
#1 & 2 are directly in front of you and in the center of the cylinder head crossing it width wise.
#3&4 are to the left of #1&2, / #5&6 are to the right of #1&2
#7&8 are to the left of #3&4 / #9$10 are to the right of #5&6
Now, you have the sequence.
After the initial pull, back off all the bolts in the same sequence and then retorque them to 36 Nm ( 28 ft lb)
Using a torque angle wrench or having the ability to accurately judge turning angles. Rotate (clockwise) to a 75 degree angle. do this to all the bolts using the sequence I had provided.
Rotate the bolts (clockwise) 75 degrees again on all bolts in the same sequence. The proceedure is complete!

SOURCE: I need to replace my Nissan Quest 2007 in cabin micro filter

I'm going to send you exploded view of the glove box and the in cabin micro filter cover illustration. Remove the two upper screws on the glove box and carefully pry metal clips loose.
Disconnect glove box lamp electrical connector. Do not let glove box assembly hang from glove box lamp harness.
Remove three lower screws and remove damper clip from glove box door. Separate glove box housing and passenger instrument lower panel.
Remove three screws and remove in cabin micro filter cover.
Remove in cabin micro filters from front heater and cooling unit assembly.
Note When installing two new in cabin micro filters ensure that the filters are facing in the direction indicated by the direction arrow for the airflow. Direction arrow is printed on side of in cabin micro filters.
Install in cabin micro filter cover. Reinstall glove box.

Testimonial: "Finaly I found the air flow door with three screws and removed it. The filter will need replacement soon. It is been replaced one time at the dealer."