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Re: what is the valve cover torque sequence for a 2000...
No spec for torque. Bolts have shoulders. Replace gasket. Tighten the 2 center nuts first and just tighten the rest until they stop. You can tighten one and jump across the valve cover and do the other, but not necessary.
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Big difference between valve cover gasket and head gasket. To replace head gasket, you must dissamble top end of engine and send the head out to be resurfaced and then install new head gasket. If it is a leaking valve cover it is much easier. Simply dissasemble and then clean valve cover and top of head from all debris and remove all old gasket material. Tighten back down in sequence and do not over tighten. these small bolts can be overtightened easily so go in sequence just like when you tighten lug nuts by skipping one as you go around. 10mm bolts require about 10 pounds or less torque.
Don't know what type motor you've got, but this same thing happened with a DOHC Saturn engine. In the inside of the valve cover there's an O ring in each spark plug hole, they need to be replaced. If this is the problem, you'll want to replace the valve cover gasket as well. Since you'll already have the valve cover off. Also when replacing the valve cover, be sure to tighten the valve cover bolts in the proper sequence and proper torque.
Fig. Cylinder head bolt loosening sequence - Altima & Maxima 3.5L engine
Install the cylinder head bolts and torque in sequence as follows:
Step 1: 72 ft. lbs. (98 Nm).
Step 2: Completely loosen all bolts.
Step 3: 26-32 ft. lbs. (34-44 Nm).
Step 4: plus 90-95 degrees clockwise.
Step 5: plus 90-95 degrees clockwise.
Fig. Right cylinder head bolt torque sequence- Altima & Maxima 3.5L engine
Fig. Left cylinder head bolt torque sequence- Altima & Maxima 3.5L engine
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The problem with heads is they have to be torqued down to the correct tension on the bolts and in sequence. A repair manual will give you the sequence and torque setting, if you are confident enough, they are easy to change you will just need a torque wrench.
replace the front oil seal. first i would clean the engine with purple power (degrease etc.) then look at the engine and make sure the leak is not coming from above like possibly the valve cover gasket or from the oil sending unit. try to tighten the bolts on the valve cover and even the oil pan. you never know, you may get lucky. i don't know where you are but front seals are cheap but the labor on the job is what costs you.
I highly recommend you buy a Hanes/Chilton manual for your make and model of car. The manual will tell you inch pounds and torque sequence for tightening the vale cover back on. Usually the sequence works from the center and works it way to the outside bolts. Please rate this reply if you found this helpful.
NEED VALVE COVER TORQUE
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