Question about 2002 Nissan Altima
So 80 degrees is approx. how many ft lbs.
Posted on Jun 19, 2010
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
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
Fig. Removing the front suspension member-Altima
Fig. Cylinder head bolt removal sequence-2.5L engine-Altima and Sentra
Fig. Cylinder head bolt tightening sequence-2.5L engine-Altima and Sentra
NOTE If possible, replacement of the head bolts is suggested.
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
Posted on Apr 29, 2010
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Posted on Jan 02, 2017
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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Fig. Cylinder head bolt loosening sequence - Altima & Maxima 3.5L engine
Install the cylinder head bolts and torque in sequence as follows:
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