Help Nissan altima cylinder head torque sequence

[Adrian]

Hello I recently bought a nissan altima 2010 very cheap because it has a blown head gasket, I’m going end up replacing the old water pump, thermostat and a cylinder head with new ones , the problem i’m having trouble finding the cylinder head torque sequence and Torque , i look everywhere and didn’t find much on altima’s the only thing i could find was one pdf and im not sure if it correct.
this is the engin, page 64 is the cylinder head

the whole file http://diyservicemanuals.com/nissan/NissanAltima2010.rar

I’m suspicious that is wrong on this pdf because Torque seem to high for the cylderhead unless i’m wrong?

Step a : 98.1 N·m (10 kg-m, 72 ft-lb) < looks too high for beginning unless i'm reading it wrong im new to this Step b : Loosen to 0 N·m in the reverse order of tightening. Step c : 39.2 N·m (4.0 kg-m, 29 ft-lb) Step d : 75° clockwise Step e : 75° clockwise

Attachments:

• EM.pdf

Topic

[Dave Tidman]

That matches the sequence in the FSM:

http://www.nicoclub.com/FSM/Altima/2010/EM.pdf

Since this is the NIssan FSM, I would trust it. It looks like they are using a higher torque to set something (maybe the head gasket), then using a different torque for final assembly. Maybe some of the professional techs could comment on this.

[jason]

Cylinder Head Torque

1st step; – 72 ft./lbs.
2nd step; loosen all bolts in reverse order.
3rd step; – 29 ft./lbs.
4th step; – turn 75 degrees
5th step; – turn 75 degrees
Note: Check diameter of bolts at two points, 12 mm and 55 mm from the end. Whenever the difference between these two points exceeds the limit of 0.23 mm, replace bolts. Apply new engine oil to threads and seating surface of mounting bolts.
looks like you are dead on

[Adrian]

Thank you for your help i appreciate it.

[Adrian]

Thank you for your help i have one last question what does it mean on 2nd step; loosen all bolts in reverse order. can you please explain that part.

[Dave Tidman]

I think it means to just loosen the bolts so there is no torque on them in the reverse order that you tightened them in.

Step b : Loosen to 0 N·m in the reverse order of tightening.

The 0 N-m is the important part in this step. I’m not sure why they do it this way, but my best guess is to seat the head gasket…

[EricTheCarGuy]

You might also find this helpful.

That info should come in handy for the degree part of the torque sequence.

Good luck and please keep us updated.

[Author]

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