Question about 1994 Nissan Altima

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How hard to replace head gasket on 1994 nissan altima

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Here's a link to procedure, not knowing how mechanically inclined or experienced you are, I'll let you decide if your up to it or not.

Posted on Feb 28, 2009


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Posted on Jan 02, 2017

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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!

Posted on Apr 23, 2009

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SOURCE: how to replace head gasket in a 1994 nissan hard

Your best bet is to purchase a Chilton or Haynes manual for that vehicle first nad read over it before getting your hands dirty, it has a timing chain which you will need instruction to realign, the rest is removal of intake and exhaust manifolds and head...bit more to it than that but, if it were overheated you may have to have the head machined, and pressure tested for cracks(aluminum) and use proper torque with NEW(recommended) head bolts, let me know if that helps OR if you need better insight

Posted on Jan 02, 2011

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