Nissan QR 2.5 engine produces a torque of 180 ft·lbf (244 N·m) of torque at 4000 rpm .
From wikipedia:
The QR family of straight-4 piston engines by Nissan range from 2.0 L to 2.5 L in displacement. These motors are aluminum, dual overhead camshaft (DOHC), four-valve designs with variable valve timing and optional direct injection.
The 2.0 L (1998 cc) QR20DE produces 147 hp (110 kW) and 148 ft·lbf (200 N·m) The bore is 89 mm with a stroke of 80.3 mm and a compression ratio of 9.9:1
The QR25DE is a 2.5 L (2488 cc) variant built in Decherd, TN
with cast steel connecting rods, a steel timing chain, counter-rotating
balance-shafts, and an aluminum intake manifold. The engine bore is
89 mm with a stroke of 100 mm and a compression ratio of 9.5:1.[3]
Output is rated 175 hp (130 kW) at 6000 rpm with 180 ft·lbf (244 N·m)
of torque at 4000 rpm in the Altima 2.5 and Sentra SE-R models. Altimas
that are PZEV compliant create 170 hp (130 kW) and 175 ft·lbf (237 N·m) of torque.[4] In the 2005+ Nissan Frontier the QR25DE generates 154 hp (115 kW) and 173 ft·lbf (235 N·m) of torque.[5]
More recently, in the Nissan SE-R Spec V 2007+ the QR25DE generates
200 hp (150 kW) @ 6600 rpm and 180 ft·lbf (240 N·m) of torque @ 5200
rpm with a 7000 rpm redline. The crankshaft comes fully balanced
allowing removal of the counter-shafts built into the older style QR25.
The newer version is also equipped with a composite intake manifold and
compression has been bumped up to 10.5:1[6]
Vehicle applications:
Stated versus observed power
In addition to the physical problems suffered by the QR25DE,
Nissan's official stated power and torque numbers seem to disconnect
from power measurements taken by the general public. Though rated for
175 hp (130 kW) and 180 ft·lbf (240 N·m) of torque in the Nissan Altima
and Sentra SE-R Spec-V, the actual power of the engine may be
significantly lower. Multiple dynamometer
readings performed by a range of people in an assortment of cars over
several years have shown that the engine more than likely produces
~160 hp and ~170 ft·lbf of torque. Parasitic loss
alone seems an unlikely candidate for the discrepancy as automatic
transmission loss would be approximately 28% and manual transmission
loss 19%.[10][11]
However, engine dyno tests performed by Brian Crower, a respected
aftermarket parts supplier, shows this engine does indeed perform very
close to the advertised numbers. The high weight of the Helical Limited
Slip differential which is in many models with this engine, and the
very heavy dual mass flywheel likely account for the losses on
traditional chassis dynos.
SOURCE: 87 samurai bolt torque specs for engine
The haynes book is not recommended since there are numerous mistakes and they still will not update. One of the biggest is the firing order.
The factory service manual is the only way to go.
Head bolts - 46 - 50.5 lbs (there is an order sequence for the bolts)
Intake & exhuast manifolds- 13.5 - 20 lbs
Flywheel - 41.5 - 47 lbs
Clutch cover - 13.5 - 20 lbs
SOURCE: torque specs for toyota tercel
Hello vienotkelly: The correct Main bolt torque is 42 foot pounds. The connecting rods torque to 29 foot pounds. The torque sequence for the head bolts and the correct way to tighten the bolts are attached to this reply. Thak You for using
FixYa. Roger
SOURCE: Looking for the torque specs for 1998 chevy astro van?
1998 chevy astro 4.3 v6 torque specs include :
* foot pounds *
balance shaft (if equiped) gear bolt = step 1 = 15 ft.lbs. step2 = additional 35 degrees.
camshaft sprocket bolt = 18 ft. lbs.
connecting rod cap = step 1 = 20 ft. lbs. step 2 = additional 70 degrees.
crankshaft damper bolt = 74 ft. lbs.
crankshaft oil deflectorbolt/nut = 27 ft.lbs.
cylinder head bolts = step 1 = 15 ft. lbs. step 2 = additional 73 degrees. (tighten in sequence)
exhaust manifold bolts = step 1 = 11 ft. lbs. step 2 = 22 ft. lbs.
flywheel bolt = 74 ft. lbs.
main bearing cap bolts = step 1 = 15 ft. lbs. step 2 = additional 73 degrees.
oil filter adapter bolt = 15 ft. lbs.
oil pan bolt/nut = 18 ft. lbs.
oil pump bolt = 66 ft. lbs.
rocker arm with press in studs = 18 ft. lbs.
rocker arm with screw in studs = 19 ft. lbs.
valve lifter retainer bolt = 12 ft. lbs.
water pump bolt = 33 ft. lbs.
* inch pounds *
balance shaft retaining plate bolt = 106 in. lbs.
camshaft retainer plate bolt = 106 in. lbs.
front cover bolt = 106 in. lbs.
intake manifold upper = step 1 = 44 in. lbs. step 2 = 88 in. lbs.
intake manifold lower = step 1 = 27 in. lbs. step 2 = 106 in. lbs. step 3 = 133 in. lbs. ** (tighten bolts in sequence) 
thanks for your vote !
SOURCE: Need torque specs for oil pan gasket
There likely is a spec for oil pan but unless you are a finatic, you really don't need to know what it is. Simple rule: Don't crank down ******* any fastener. If corners near crank ends have larger fasteners, you can tighten them a bit more than on siderails. Before tightening anything, install all bolts finger tight, to ensure that they are not cross threaded. To avoid warping pan, tighten from the center of the pan, working towards both ends, alternating from side to side as you go. When you are finished, go over it again, using the same amount of force on each bolt. As I said, end bolts can if larger in diameter, be tightened more but be careful not to tighten so much that you will either split or push the gasket out the sides.. Anywhere two gasket ends **** together, I recommend using a sensor -safe dab of silicone. An oil pan is not under any mechanical stress or pressure. I have used this method for many years and NEVER had one leak. If you really need #s, small fasteners get about 12-15in lbs, larger ones about 20.
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