How do i remove fuel line to bemove the head - 1999 Chevrolet Cavalier

old post but see it asked many times.
assemble the rail first, its 1 piece so must be ready first.
3.7L Engine (FSM) RTM?
(1) If fuel injectors are to be installed, refer to Fuel
Injector Removal/Installation.
(2) Clean out fuel injector machined bores in
intake manifold.
(3) Apply a small amount of engine oil to each fuel
injector o-ring. This will help in fuel rail installation.
(4) Position fuel rail/fuel injector assembly to
machined injector openings in cylinder head.
(5) Guide each injector into cylinder head. Be careful
not to tear injector o-rings.
(6) Push right side of fuel rail down until fuel
injectors have bottomed on cylinder head shoulder.
Push left fuel rail down until injectors have bottomed
on cylinder head shoulder.
(7) Install 4 fuel rail mounting bolts and tighten.
Refer to torque specifications.
(8) Install 6 ignition coils. Refer to Ignition Coil
Removal/Installation.
(9) Connect electrical connectors to throttle body.
(10) Connect electrical connectors at all fuel injectors.
To install connector, refer to (Fig. 37). Push connector
onto injector (1) and then push and lock red
colored slider (2). Verify connector is locked to injector
by lightly tugging on connector.
(11) Connect necessary vacuum lines to throttle
body.
(12) Connect fuel line latch clip and fuel line to
fuel rail. Refer to Quick-Connect Fittings.
(13) Install air box to throttle body.
(14) Install air duct to air box.
(15) Connect battery cable to battery.
(16) Start engine and check for leaks.

sounds like the injector sleeve O rings have failed this was common.
if you put a clear plastic piece of hose on supply line for diesel fuel filter to head fitting at front and fuel is not black but normal diesel colour thats good.
then put clear hose on return line fitting at rear of cylinder head and fuel is now darker, engine oil is by passing injector sleeve top O rings and entering into fuel gallery in head.
rocker cover, injector rail, injectors need removing and injector sleeves need replacing as well as O rings and seats.
a special tool is needed to remove the injector sleeves out of the head. you will also need to drain the cooling system before removing the injector sleeves, so coolant is also needed.
dealers have special tool for injector sleeves

This is caused by a leaking valve cover gasket, you will need to replace it.
Instructions

1. • 1Pop the hood on the engine compartment and make sure the engine is cool. Disconnect the negative battery cable to prevent possible shock. Remove the air outlet using a screwdriver. Loosen the PCV hose clamp at the valve cover with the screwdriver and pull the hose from it. Disconnect the quick connect fitting from the fuel line at the fuel rail.
     
   • 2Remove the fuel line clips from the fuel line bracket. Reposition the fuel feed line out of the way of the valve cover. Remove the bolt from the fuel line bracket using a wrench and take the bracket off. Mark the proper location of each of the wires on the ignition coils using the marker and masking tape and then pull them off.
     
   • 
     3
   • Remove the wiring harness clips from the valve cover. Remove the valve cover bolts using a socket and ratchet. Pull the valve cover away from the cylinder head. Remove the valve cover gasket from the cylinder head. Use the scraper to remove any gasket material that remains. Clean the cylinder head mounting surface using the rags.
     
   • 4Place a new gasket on the cylinder head. Place the valve cover on the gasket and line it up properly with the cylinder head. Secure the valve cover bolts using the socket and ratchet. Attach the wiring harness clips to the valve cover. Attach the wires to the ignition coils according to the labels you made.
     
   • 5Place the fuel line bracket in place and tighten the bolt with the wrench. Move the fuel line back into place and attach the fuel line clips to the bracket. Connect the quick connect fitting of the fuel line to the fuel rail. Connect the hose to the PCV valve at the valve cover and tighten the clamp with the screwdriver.
     
   • 6Connect the air outlet and tighten the clamp with the screwdriver. Connect the battery cable. Start the engine and check the valve cover for leaking around the new gasket.
     

• It is important that you disconnect the battery as instructed. Otherwise, you are not only at risk of electrical shock, but you may also short out and damage other components.
  

Read more: How to Replace the Valve Cover Gasket on a 2.4L GM ' eHow.com http://www.ehow.com/how_7703691_replace-cover-gasket-24l-gm.html#ixzz1yBFqV3VV

so that mean the old one is all ready removed.?
or did you mean all steps in the fsm for INJECTOR.
the steps are the same on all EFI fuel rail injectors.
you could google that or you tube it or read the FSM.

hide call keys from step 2 on, or very bad things can happen.
(wife or kids no aware of danger)
ill just cover the (basics)
1: per FSM , depressurize the system, in can be at 60PSI
parked. so avoid fuel in eyes, or a fire. we do that first.
gain access to rail under failure. (RUF) (no barking)
2: remove injector X , wire plug. (failing)
3: then detach the injector rail clamps the both rails off as one....
injector are all now loose, to pull off.
4: add new seals to new injector, and install in reverse order.

that's it, only the gain access , varies,... mostly.

last depressure steps:
run engine,
remove fuel pump relay, engine stalls. key off, hide keys!

next tje FSM words (just the OFF section)

1. Remove fuel tank filler tube cap.
2. Perform Fuel System Pressure Release Procedure.
3. Remove negative battery cable at battery.
4. Remove air duct at throttle body air box.
5. Remove air box at throttle body.
6. Disconnect fuel line latch clip and fuel line at fuel rail. A special tool will be necessary for fuel line disconnection.
7. Remove necessary vacuum lines at throttle body.
8. Disconnect electrical connectors at all 6 fuel injectors. Push red colored slider away from injector. While pushing slider, depress tab and remove connector from injector. The factory fuel injection wiring harness is numerically tagged (INJ 1, INJ 2, etc.) for injector position identification. If harness is not tagged, note wiring location before removal.
9. Disconnect electrical connectors at throttle body sensors.
10. Remove 6 ignition coils.
11. Remove 4 fuel rail mounting bolts.
12. Gently rock and pull left side of fuel rail until fuel injectors just start to clear machined holes in cylinder head. Gently rock and pull right side of rail until injectors just start to clear cylinder head holes. Repeat this procedure (left/right) until all injectors have cleared cylinder head holes.
13. Remove fuel rail (with injectors attached) from engine.

end expert.

alldata.com
login and read all steps. that be best , then ask questions?

YEP REMOVE TOP ENGINE COVER AND DISCONNECT INJECTORS ELECTRICAL CONNECTOR,REMOVE FUEL RETURN LINE FROM INJECTOR, REMOVE FUEL INJECTOR HIGH PRESSURE LINE, REMOVE FUEL INJECTOR RETAINER AND RETAINING BOLT,THEN REMOVE FUEL INJECTOR FROM THE CYLINDER HEAD. YOU NEED A FUEL INJECTOR EXTRACTOR TOOL 9075A ON TO INJECTOR AND CYLINDER HEAD.YOU DONT HAVE TO REMOVE THE ENGINE.

You need a special tool to remove them. Available at most automotive parts stores.

Leave the exhaust manifold attached and just push it away. Remove the head bolts and make sure all vacuum lines and fuel lines and water lines are disconnected. Make sure you have the head resurfaced before reinstalling and buy new head bolts. Remember to torque the head bolts to spec. But it seems to me like you pretty much got the hang of it.

Unscrew the lines to the fuel injectors, there is no need to remove fuel injectors to replace a head gasket.

Hi, I hope this helps...

1994-96 Engines
See Figures 3 and 4



Fig. Fig. 3: Details of the fuel pump assembly-1994-96 diesel engine



Fig. Fig. 4: View of the fuel pump-1994-96 diesel engine

1. Remove the turbocharger assembly.
2. Remove the fuel line banjo bolt at the pump.
3. Remove the fuel line fittings at the rear of the cylinder heads.
4. Remove the fuel lines assembly.
5. Loosen the two hose clamps at the fuel pump fittings.
6. Disconnect the water drain hose at the fuel filter.
7. Disconnect the filter and position it forward.
8. Remove the fuel pump retaining bolts, then lift the pump out of the crankcase bore.
9. Remove the fuel pump tappet from the crankcase bore.

To install:

1. Rotate the engine so the fuel pump eccentric is on the base circle.
2. Install the fuel pump tappet in the base of the fuel pump.
3. Replace the O-ring on the fuel pump base.
4. Install the fuel pump and bolt it in place.
5. Install the fuel filter and connect the water drain hose.
6. Connect the two fuel hoses at the front of the fuel pump.
7. Tighten the fuel line clamps and install the fuel filter retaining bolts.
8. Install the fuel line assembly and new seal rings at the rear of the pump.
9. Loosely install the fuel line fittings at the rear of the cylinder heads.
10. Install the fuel line banjo fitting at the pump. Tighten the fitting to 40 ft. lbs. (54 Nm).
11. Tighten the fuel line fittings.
12. Install the turbocharger assembly.

This was the procces on an 86 chev 1/2 ton. Should be the same. Remove glove box. Undo manual controls for duct work. you'll see them there behind where the glove box was on top of the heater core housing. Bemove screws/bolts. Don't remember how many there are. Undo hose clamps in the engine compartment. Remove heater core.