Following Manual

Overview
The 97-99 A8 is prone to two types of fuel leaks, one coming from the high pressure fuel line under the hood, and the other at the gas tank sending unit seal in the trunk. This procedure covers the high pressure fuel line under the hood. It is normally noticed during the cold winter months. The fitting leaks when very cold and fuel leaks out. It creates a smell of fuel in the passenger compartment. Once the fuel line heats up a small amount (such as after the car is turned off in the winter and the engine heat causes it to increase in temperature), it usually seals up.

Disclaimer
Fuel leaks and lines are serious business. This procedure is for a repair of the line versus replacement of the entire fuel line system. The fuel lines (which are all together as a kit) from the dealer is about $800 for the parts. Then it has to be installed from the engine compartment back to the fuel tank. This procedure repairs the leak, costs about $10.00 and takes about an hour.

Audipages.com takes no responsibility for this repair! Use it at your own risk.

Supplies Required

• 17 mm open ended wrench
• 14 mm open ended wrench
• Accetone or equivalent
• 80 grit sandpaper
• Fuel resistant epoxy kit

Supplies required for repair. Make sure that the epoxy kit is fuel resistant.

Procedure
The fuel hose leaks on the high pressure side at one of the fittings. The fuel hoses are sold as one piece from the dealer, which include the supply, return and one other hose attached. It is a one piece kit that runs from the engine to the gas tank.



High pressure fuel line leak location. When it leaks, it just drips out. The fitting breaks down the pressure, so the leak is actually very low pressure.



Fuel line components.

Remove the low pressure fuel line from the fuel regulator. This is required to get proper access to the high pressure line.

Relieve the residual fuel pressure in the fuel line by cracking the high pressure line fittings. This is accomplished by using the 17 and 14 mm wrenches. Place a paper towel under the fuel line to capture the fuel that will drip.



Remove low pressure line, relieve high pressure line fuel pressure.

Remove the high pressure line, and clean with accetone. Using the 80 grit sandpaper, prep the surface by scuffing it with the sandpaper. Scuff the pipe and the fuel line fitting. After scuffing is complete, clean thoroughly with accetone.

Loosely attach the high pressure fuel line. Ensure that the angle on the line is correct for the engine plastic cover and that the low pressure line will not interfere.

Using the epoxy, place it on the fuel line. Perform this step in accordance with the instructions on the epoxy package. Let it cure in accordance with the instructions, preferably overnight. After the epoxy is cured, tighten the high pressure fittings and reinstall the low pressure line. Start the car and ensure there are no leaks. Reinstall engine plastic covers.

This eliminates the need for velocity and vacuum to pull the mixture into the chamber. It’s essentially thrown into the chamber. So to begin with timing a camshaft, the motor needs to be set at top dead center of the compression stroke. If you are unsure what this means, remove the valve cover on the driver side, rotate the crank pulley with a 32 mm socket, until you see the intake valve, which is the second valve spring, begin to compress. When I say compress, this means the valve spring is opening the valve. As the valve spring begins to close, the piston will be approaching the top of its travel. The crank shaft pulley/harmonic balancer, will have a mark to indicate top dead center on the timing cover. This Mark will align with the TDC mark on the timing cover just after the intake valve spring closes. Next, using a half inch wrench, remove the distributor and set to the side. With a flashlight, look down inside at the oil pump driveshaft. It will have a slot in the center of the gear. This slot should be pointing towards the number one intake manifold bolt hole. It will almost be front to back, but it will be skewed slightly toward the AC unit. If it is not, using a long flat blade screwdriver, rotate the oil pump driveshaft clockwise until the slot lines up with the number one intake manifold bolt hole. Reinstall the distributor and snug the half inch bolt down. The rotor should be pointing towards the number one cylinder mark on the distributor plate. Reinstall the distributor cap and try to fire the motor over. If the engine idles correctly, then take the vehicle for a test drive. If you do not have any major detonation from pre-ignition, in the last thing to do is to set the sync between the crank shaft sensor and the camshafts sensor. This is done by using a scan tool such as the dealership DRBIII, Snap-0n scanners or that any other top of the line scanner. Setting the sync using an ohm-meter has never proved to be accurate and can be off as much as negative six.

Download: Dodge Magnum Camshaft Timing and Setting Fuel Sync manual Instruction Installation