Wrx boost pressure gauge install

On the front of the intake manifold, you will find a vacuum line near the rear of the alternator. If you remove this vacuum line as we did for the installation, make sure that you reconnect it! With the vehicle raised, remove the plastic aeropan from under the vehicle that goes from the bumper, rearward, and side to side.

This gives you access to the exhaust manifolds from under the vehicle. Note the oil pan and filter in the central and left locations of the image. Note: This image was taken with the plastic aeropan and exhaust manifold heat shielding already removed. Then locate this raised boss on the manifold that you can drill and tap.

We opted to perform this operation on the vehicle. If this makes you uncomfortable you may also remove this piece from the car by removing 5 14mm nuts that hold the manifold in place.

Install the included pyrometer probe fitting s. Carefully mark the location on the heat shield where you have drilled the hole, so that you can drill the heat shield to match, for the probe to come through. After installing the retaining nut for the probe we put a thick layer of grease on it and placed the heatshield back in place. The grease transferred the location of the nut to the heatshield. Install the probe. There are a couple of options on how to obtain an oil pressure reading from this engine.

In this example, we opted to use the factory oil pressure port, that holds the low oil pressure warning light switch. Note: When removing this switch, you will lose function of the factory warning light. It will not however cause a check engine light or code on the vehicle computer.

To access this port, make sure battery power is disconnected. Next, remove the plastic alternator shroud assembly, and consult the Subaru factory service manual for the proper steps required to remove the alternator.

Here you can get a better look at the factory oil pressure switch with the alternator out of the way. With the switch removed you will not be continuing to use this harness. Because of the proximity to the alternator in this particular case, we opted for a remote mounting location for the oil pressure sender.

You will need a adapter for this location. We used AutoMeter stainless braided line kit in order to remote mount the sending unit. Install the adapter in place of the factory pressure switch. Install the line kit onto the adapter, and route to the passenger side of the engine bay. Reinstall the alternator and the alternator shroud and reconnect the battery wire to the alternator.

Thread the sender for the oil pressure gauge into the end of the line, and mount the sender to the strut tower, or inner fender. Note: If you are using a mechanical oil pressure gauge, you will then run your oil pressure line that came with your gauge straight to the adapter that you installed into the engine. All of the bolts are either 10mm or 12mm with the exception of the clamp on the coupler, which is 8mm.

Pop the plug off the firewall. A good idea is to put a hole in the middle of this plug to use as a grommet once you run the vacuum tube from inside the car. Make sure to angle it down towards the driver side like in the picture.

Tape the vacuum tube or wires if you are installing an electrical gauge to the coat hanger very securely. I put the hanger inside the tube and taped around the connection. Pull the coat hanger through the hole and the tube should come with. This is tricky and may take a few tries.

Make sure the hole is large enough for the tube to fit.