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Audi a4 boost gauge kit free#

We have highlighted their general location in blue. Turn each of the three cross-slotted beauty cover retainer clips a quarter turn to release them lift off the cover.Ĭomponents to remove from the right side of the engine include: two metal tubes, a turbo oil line, and a metal heat shield. The coolant flange is located at the rear of the engine, on the rear vertical face of the cylinder head (location indicated by our arrow).Ĭlearly, we need to remove several items to reach it. This will direct the coolant flow to a catch can, as we’re doing here.Ĭlose the drain when the flow stops. To avoid spilling coolant all over, attach a length of flexible plastic tubing to the drain outlet nipple as you open the drain-cock. Replace the sensor o-ring if you take this route. If it is really stuck and feels like it might break, you can pull the clip on the temp sensor (arrow) and remove it to drain the coolant. You may need pliers to turn the drain plug if it is stuck.

Open the bleeder at the base of the lower radiator hose (arrow) by turning it counterclockwise until the coolant flows freely.

Raise the car and remove the belly pan.

Remove the expansion tank pressure cap.

Note: Depending on whether you car has been apart before, you may need to purchase one or more worm style hose clamps of different sizes to complete this job. You may also find an unpleasant accumulation of sludge and rust in the system, as we did, so be prepared, especially if the system has been neglected. If you are replacing a coolant flange for a leak, expect to find one or both of the hoses at the end of their service life. These include the two hoses attached to the flange, and a bottle of cooling system flush.

We have listed related, optional items, available separately, and recommend them for a leak-free repair. Your Coolant Flange Kit with Coolant ( ES2602886) includes: a new coolant flange with o-ring attachment studs an engine Coolant Temperature Sensor with o-ring and plastic retainer clip, and two quarts of pure coolant. Switch the valve to pull a vacuum in the system, then move the valve to “fill” and let the vacuum in the system suck fresh pre-mixed coolant into the system from a container. Just insert the tool’s rubber cone into the coolant jug neck and connect the tool to shop air. Refilling the cooling system can be accomplished without special tools, but we prefer a vacuum refill tool. A refractometer is the most accurate tool for measuring mix ratios.

Audi a4 boost gauge kit free#

That leaves both hands free to slide the clamp off and on.Ī correct mixture of pure coolant and distilled water is essential for adequate freeze/boil-over protection and chemical protection against rust, corrosion, and harmful deposits. Attach the tool and squeeze the handle until it locks in place to expand the clamp. The flange o-ring needs a clean, flat surface to seal properly.Ī spring clamp tool makes removing and installing spring-style hose clamps a breeze.

Spend extra time cleaning the mating surface at the rear of the cylinder head where the flange mounts.

This hose connects the flange to a steel coolant tube.

Here’s a right angle view of the same coolant flange, showing the two mounting holes for the head studs.

The hose slides onto the lower flange neck, and snaps in place, retained by a metal spring clip that engages mating grooves in hose neck and flange.

The lower coolant hose has an integral sealing ring.

The Coolant Temperature Sensor is held in place by a u-shaped plastic lock clip and sealed with an o-ring.

The flange supplies coolant to two coolant hoses, and houses the Coolant Temperature Sensor.

In addition to holding the coolant flange in place the studs support a pair of tubing brackets, including a stand-off bracket for the turbo oil line. Made of plastic, it bolts to the head with two threaded studs. The coolant flange located at the rear of the Audi 1.8T cylinder head is the source of several common coolant leaks.