Re-installing stock Rockers??
#1
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Re-installing stock Rockers??
Ive had my heads off for a little while now and next week I will be putting the top end back together. I was wondering if there were any tricks to re-installing the rockers and setting them to the correct tq specs? I read on ls1how-to that they just bolt down and tq them in 2 passes to the required tq specs. Is that the correct way? Or do I need special tools to set the correct lash?
#5
TECH Senior Member
+1 what squirts11 said...
Service Manual:
# Rotate the crankshaft until number one piston is at top dead center of compression stroke.
In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position. If viewing from the rear of the engine, the additional crankshaft pilot hole, non-threaded, will be in the 10:30 position. The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3. Cylinders 1, 3, 5 and 7 are left bank. Cylinders 2, 4, 6, and 8 are right bank.
# With the engine in the number one firing position, tighten the following valve rocker arm bolts:
Tighten
* Tighten exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N·m (22 lb ft).
* Tighten intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N·m (22 lb ft).
# Rotate the crankshaft 360 degrees.
# Tighten the following valve rocker arm bolts:
Tighten
* Tighten exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N·m (22 lb ft).
* Tighten intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N·m (22 lb ft).
Service Manual:
# Rotate the crankshaft until number one piston is at top dead center of compression stroke.
In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position. If viewing from the rear of the engine, the additional crankshaft pilot hole, non-threaded, will be in the 10:30 position. The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3. Cylinders 1, 3, 5 and 7 are left bank. Cylinders 2, 4, 6, and 8 are right bank.
# With the engine in the number one firing position, tighten the following valve rocker arm bolts:
Tighten
* Tighten exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N·m (22 lb ft).
* Tighten intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N·m (22 lb ft).
# Rotate the crankshaft 360 degrees.
# Tighten the following valve rocker arm bolts:
Tighten
* Tighten exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N·m (22 lb ft).
* Tighten intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N·m (22 lb ft).