Question about 2002 Nissan Altima

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I need head bolt torque sequence for 2002 nissan altima 2.5L engine

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  • Contributor
  • 36 Answers

So 80 degrees is approx. how many ft lbs.

Posted on Jun 19, 2010

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  • Nissan Master
  • 17,970 Answers

2.5L Engine

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Drain cooling system and engine oil.
  3. Relieve the fuel system pressure.
  4. Remove or disconnect the following:
    Negative battery cable Upper radiator hose and heater hose Right side fuse/relay box and move aside Engine undercover Resonator and air cleaner case Engine top cover All electrical and vacuum lines at the head Fuse hose quick connector at fuel tube side Engine harness and power steering hose bracket Timing chain Drive belt tensioner Camshafts Spark plugs Exhaust manifold
  5. Support the engine from above and below with a suitable jack and hoist.
  6. Remove or disconnect the following:
    Power steering pump and reservoir and wire aside Auxiliary drive belts A/C compressor and wire aside Upper sway bar links Front and rear engine mount through bolts Lower ball joints 2 steering gear housing mounting bolts Front suspension member bolts and front suspension member
  7. Loosen the cylinder head bolts in the sequence shown and remove the cylinder head.

    I need head bolt torque sequence for 2002 nissan - 2875859.jpg
    Fig. Removing the front suspension member-Altima

    d997868.jpg

    Fig. Cylinder head bolt removal sequence-2.5L engine-Altima and Sentra

    84cece1.jpg

    Fig. Cylinder head bolt tightening sequence-2.5L engine-Altima and Sentra
To install:
  1. Clean the gasket surfaces.
  2. Using new head gaskets, install the cylinder heads.
    NOTE If possible, replacement of the head bolts is suggested.
  3. If replacement of the head bolts is not possible, perform the following bolt measurement:
    1. Measure the diameter of the head bolt 0.43 in. (11mm) from the bottom of the bolt.
    2. Measure the diameter of the head bolt 2.17 in. (55mm) from the bottom of the bolt.
    3. Whenever the size difference between the 2 measurements exceeds 0.0091 in. (0.23mm) the head bolts must be replaced.
  4. Apply clean engine oil to the bolt threads and seating surfaces and tighten the cylinder head bolts in sequence as follows:
    1. Step 1: 72 ft. lbs. (98 Nm).
    2. Step 2: Loosen all the bolts completely.
    3. Step 2: 29 ft. lbs. (33 Nm).
    4. Step 4: Plus 75-80 degrees clockwise.
    5. Step 5: Plus 75-80 degrees clockwise.
  5. Install the front suspension member and tighten the bolts to the specifications shown in the illustration.
  6. Install or connect the following:
    2 steering gear housing mounting bolts Lower ball joints Front and rear engine mount through bolts Upper sway bar links A/C compressor Auxiliary drive belts Power steering pump and reservoir Exhaust manifold Spark plugs Camshafts Drive belt tensioner Timing chain Engine harness and power steering hose bracket Fuse hose quick connector at fuel tube side All electrical and vacuum lines at the head Engine top cover Resonator and air cleaner case Engine undercover Right side fuse/relay box and move aside Upper radiator hose and heater hose Negative battery cable
  7. Fill the cooling system and engine oil
  8. Start the vehicle, check for leaks and repair if necessary.

continue...

Posted on Apr 29, 2010

  • ZJ Limited
    ZJ Limited Apr 29, 2010

    continue...







    1. Before servicing the vehicle, refer to the Precautions Section.


    2. Drain cooling system and engine oil.


    3. Relieve the fuel system pressure.


    4. Remove or disconnect the following:


      Negative battery cable

      Strut tower cross brace
      Timing chain
      Camshafts
      Exhaust manifold




    5. Support the engine from above and below with a suitable jack and
      hoist.



    6. Loosen the cylinder head bolts in the sequence shown and remove
      the cylinder head.






    To install:





    1. Clean the gasket surfaces.



    2. Using new head gaskets, install the cylinder heads.




      NOTE

      If possible, replacement of the head bolts is suggested.





    3. If replacement of the head bolts is not possible, perform the
      following bolt measurement:




      1. Measure the diameter of the head bolt 0.47 in. (12mm) from the
        bottom of the bolt.



      2. Measure the diameter of the head bolt 2.17 in. (55mm) from the
        bottom of the bolt.



      3. Whenever the size difference between the 2 measurements exceeds
        0.0091 in. (0.23mm) the head bolts must be replaced.







    4. Apply clean engine oil to the bolt threads and seating surfaces
      and tighten the cylinder head bolts in sequence as follows:




      1. Step 1: 72 ft. lbs. (98 Nm).


      2. Step 2: Loosen all the bolts completely.


      3. Step 2: 29 ft. lbs. (33 Nm).


      4. Step 4: Plus 75-80 degrees clockwise.


      5. Step 5: Plus 75-80 degrees clockwise.






    5. Install or connect the following:


      Exhaust manifold

      Camshafts
      Timing chain
      Strut tower cross brace
      Negative battery cable





    6. Fill the cooling system and engine oil


    7. Start the vehicle, check for leaks and repair if necessary.



    Hope help with this (remember comment and rated this).


  • deton8 von Splosion Aug 03, 2016

    Wow... nicely done!

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Posted on Jan 02, 2017

  • 383 Answers

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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I need head bolt torque sequence for 2002 nissan altima 2.5s engine


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2_17_2012_6_58_18_pm.jpg

Fig. Cylinder head bolt loosening sequence - Altima & Maxima 3.5L engine

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2_17_2012_6_59_54_pm.jpg

Fig. Right cylinder head bolt torque sequence- Altima & Maxima 3.5L engine


2_17_2012_7_00_21_pm.jpg

Fig. Left cylinder head bolt torque sequence- Altima & Maxima 3.5L engine

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2_17_2012_6_58_18_pm.jpg

Fig. Cylinder head bolt loosening sequence - Altima & Maxima 3.5L engine

Install the cylinder head bolts and torque in sequence as follows:
  1. Step 1: 72 ft. lbs. (98 Nm).
  2. Step 2: Completely loosen all bolts.
  3. Step 3: 26-32 ft. lbs. (34-44 Nm).
  4. Step 4: plus 90-95 degrees clockwise.
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2_17_2012_6_59_54_pm.jpg

Fig. Right cylinder head bolt torque sequence- Altima & Maxima 3.5L engine


2_17_2012_7_00_21_pm.jpg

Fig. Left cylinder head bolt torque sequence- Altima & Maxima 3.5L engine

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2_17_2012_6_58_18_pm.jpg

Fig. Cylinder head bolt loosening sequence - Altima & Maxima 3.5L engine

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2_17_2012_6_59_54_pm.jpg

Fig. Right cylinder head bolt torque sequence- Altima & Maxima 3.5L engine


2_17_2012_7_00_21_pm.jpg

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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!

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