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1998-2002 Nissan Frontier with 2.4 L KA24D and KA24DE class engines , Cylinder Head Bolts Tightening Procedure :- you have total of 10 bolts , 5 on the LH of engine and 5 on RH ( LH is the intake side and the RH is the exhaust side ) : starting from center LH #1 , #2 on RH center side , #3 LH front of #1 , #4 RH behind #2, #5 RH before #2 , #6 LH behind #1 , #7RH engine front corner , #8 LH end of engine corner, #9 LH front engine corner and final #10 bold is RH end of engine corner .
the Torque spec steps are as follows :
step A- tighten all bolts to 29N-M ( 3.0 kg-M or 22 Ft lb ) step B- tighten all bolts to 79 N-M ( 8.1 kg-M or 59 Ft ib )
step C- loosen all bolts completely .
step D- tighten all bolts again to 25 up to 34 N-M ( 2.5 up to 3.5 kg - M or 18 to 25 Ft lb )
step E- using angle wrench ( turn all bolts clockwise 86+ - degrees ) if you don't have an angle wrench ? do as follows : as final step : tighten all Bolts 75 up to 84 N-M ( 7.6 up to 8.6 Kg - M or 55 to 62 Ft lb ) .
end of procedure .
Answer barbo(fiat mechanic) Fiat do not issue torque settings for a punto they use angles so that you can snap your stretch bolts! after contacting fiat and haynes neither of them would give proper torque settings, so i delved into my many tech manuals on fiat fire engines which is what is in your punto and i have successfully changed many fiat punto head gaskets using the following torque settings: stage 1 starting from the centre head bolts tighten to 33nm: stage 2:65nm and finally stage 3: 96nm these torque settings work fine and will probably save you buying new head bolts.
Removal 1. Remove the engine front cover. 2. CAUTION: This pulse wheel is used with several difference engines. Install the pulse wheel with the keyway in the slot stamped 30 or30 RFF only (orange in color). Remove the ignition pulse wheel.3. Install the damper bolt. 4. NOTE: LH shown, RH similar. Remove the LH and RH spark plugs. 8.80 Page 2 5. Rotate the crankshaft clockwise to position the crankshaft keyway in the 11 o’clock position and position the camshafts in the correct position. This will position the number one cylinder at Top Dead Center (TDC). ^ Verify that the camshafts are correctly located. If not, rotate the crankshaft one additional turn and recheck.
Remove the engine front cover. For additional information, refer to Engine Front Cover in this section.
Remove the crankshaft sensor ring from the crankshaft.
Rotate the crankshaft until the timing mark on the RH camshaft sprocket is approximately at the 11 o'clock position and the timing mark on the LH camshaft sprocket is approximately at the 12 o'clock position.
Using the special tool, position the crankshaft as shown.
Install the special tool.
NOTE: LH shown; RH similar. Remove the two bolts, the timing chain tensioner and tensioner arm.
Remove the LH and RH timing chains and the crankshaft sprockets.
Remove the special tool from the crankshaft.
Remove the timing chains from the camshaft sprockets.
Remove the right and left timing chains and the crankshaft sprocket from the crankshaft.
CAUTION: The bolts are different lengths and must be returned to their original location. NOTE: LH shown; RH similar. Remove the bolts and the timing chain guides.
Installation
CAUTION: Timing chain procedures must be followed exactly or damage to valves and pistons will result. CAUTION: Do not compress the ratchet assembly. This will damage the ratchet assembly. Compress the tensioner plunger, using an edge of a vise.
Using a small screwdriver or pick, push back and hold the ratchet mechanism.
While holding the ratchet mechanism, push the ratchet arm back into the tensioner housing.
Install a paper clip into the hole in the tensioner housing to hold the ratchet assembly and plunger in during installation.
Remove the tensioner from the vise.
NOTE: There are 61 links in the timing chain. If the copper links are not visible, mark two links on one end and one link on the other end, and use as timing marks.
Install the timing chain guides.
Using the special tool, verify correct crankshaft position.
Remove the special tool.
NOTE: Crankshaft sprockets are identical. They can only be installed one way. Refer to the following illustration for correct crankshaft sprocket installation. If removed, install LH and RH crankshaft sprockets.
Install the LH timing chain onto the crankshaft sprocket, aligning the one copper (marked) link on the timing chain with the slot on the crankshaft sprocket.
Position the LH timing chain on the camshaft sprocket with the two copper (marked) chain links and the camshaft sprocket timing mark aligned.
Position the RH (outer) timing chain on the crankshaft sprocket, aligning the copper (marked) link with the timing mark on the sprocket.
Position the RH timing chain on the camshaft sprocket. Make sure the two copper (marked) links align with the camshaft sprocket timing mark.
NOTE: LH shown; RH similar. Position the tensioner arms and tensioners, and install the bolts.
Remove the tensioner retaining clip.
As a post-check, verify correct alignment of all timing marks.
Remove the special tool.
Position the crankshaft sensor ring on the crankshaft.
Install the engine front cover. For additional information, refer to Engine Front Cover in this section.
Raise the vehicle. For additional information refer to Section 100-02 .
Remove the engine splash shields.
Unclip the heated oxygen sensor (HO2S) wire harness.
CAUTION: Cover the screw-type jack with a shop rag to prevent damage to the crankshaft pulley. Position a screw-type jack under the crankshaft pulley.
Remove the RH engine support insulator through bolt and nut.
Remove the LH engine support insulator through bolt.
Remove the transverse member.
Remove the bolts.
Remove the transverse member.
If removing the RH engine support insulator, remove the RH engine support insulator.
Remove the bolts.
Remove the RH engine support insulator.
If removing the LH engine support insulator, remove the LH engine support insulator.
Remove the nuts and bolts.
Remove the LH engine support insulator.
Installation
NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 mi) or more to relearn the strategy. To install, reverse the removal procedure.
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