Getting beat up over header install
Clip from install instructions
We’ll work on the right side (passenger side) of the engine first.
· On the right side of the engine (passenger side) remove the bolt holding the oil dipstick
tube to the exhaust manifold. On 2001 and newer C-5’s, remove the dipstick tube hold
down bolt out of the head itself as opposed to the exhaust manifold.
· Pull the dipstick tube and dipstick out of the hole in the engine block and set aside for reinstallation
during a later step.
· Remove the spark plug wires from both the coil packs and spark plugs.
· Remove the spark plugs from the right side engine bank (passenger side).
· Remove the bolts from the air tube flange and remove the air tube flange gasket.
· Disconnect the plug connecting the coil packs to the main wiring harness and two (2)
press–on hoses. Loosen and remove the bolts holding the valve cover to the head. Lift the
valve cover with the coil packs still attached off the right side engine bank (passenger side)
and cover the exposed valve springs with several shop towels to prevent contamination.
* On 2001 and newer C-5’s, the entire coil pack must be removed as a unit to get to the
valve cover hold down bolts
Now switch to left side (driver side) of the engine.
· Remove the bolts from the air tube flange and remove the air tube flange gasket from the
air tube on the left side engine bank (driver side).
· Remove the clamp holding the air tube/gulp valve assembly to the hose, remove the
assembly and set it aside for reinstallation during a later step.
· Remove the spark plug wires from both the coil packs and sparkplugs on plugs # 1 & # 3.
Remove the spark plug wires from the coil packs on #5 and # 7.
· Remove the two (2) rear coil packs from the valve cover and lay on top of the valley cover.
* On 2001 and newer C-5’s, the entire coil pack unit should be removed to give more hand
and maneuvering clearance. Disconnect the spark plug wires on all left (driver side)
bank cylinders from both the coil packs and the spark plugs.
· Remove the spark plug wires from the balance of the sparkplugs.
· Remove the spark plugs from the left side engine bank (driver side)
· Loosen the alternator drive belt at the belt tensioner and slip the belt off the alternator
pulley.
· Remove the alternator mounting bolts and lay the alternator on the front of the engine.
(This is necessary to provide clearance while removing the stock manifold.)
Get the complete instructions here;
http://lib.store.yahoo.net/lib/after.../c5install.pdf











