Rubbing Mark on Timing Belt

Subaru has received questions regarding rubbing marks on the back (flat) side of timing belts on several models over recent years. The mark is caused by the timing belt contacting the timing belt guide. This mark does not have any effect on the performance of the timing belt, such as durability, and no repairs should be attempted.

Applicable Model	Specification	MY
Legacy	H4 Models	1995-2004
	H4 Turbo and H4 NA-MT Models	2005 and After
Forester	All	1998 and After
Impreza	All	1993-2003
	MT Models	2004 and After
Baja	2.5 L MT Models	All MY

Platinum Spark Plug Change Intervals

The SOA Tech Support Line occasionally receives calls concerning the change intervals on platinum spark plugs and why some engines are required to have the plugs changed at 30,000 miles, 0while others are specified to be replaced at 60,000 miles.

The spark plug used on the 2.5L engine has a platinum electrode, but the core is not platinum. Therefore, the maintenance replacement interval is 30,000 miles.

On the 2.5L Turbo and 3.0L engines, both the electrode and core are platinum. The maintenance replacement interval is 60,000 miles.

Inoperative Keyless Entry Remote

If a keyless entry remote fob is not functioning, first check that the battery is good. Next, inspect the battery contacts in the remote for oxidation, a common cause of failure. SOA says lightly buffing the battery terminals and remote contacts with a coarse cloth will remove most oxidation for best results. After these simple steps, a determination can be made to replace the battery or remote.

Center Dash Vent Temperature Variation — 2005-2006 Legacy and Outback

If a customer is concerned because the temperature of the air coming out of the center dash vent is different on the driver’s side from the air on the passenger’s side, SOA says you can inform the customer that the up to an 18°F difference is considered normal and no repair is needed.

Navigation Display Illumination in Cold Weather

There is the possibility that the navigation display illumination may become dark during low temperatures conditions. The display will brighten as it warms up. This is a normal condition and repairs should not be attempted.

Turbocharger Failures

Subaru turbochargers are designed to operate at up to 180,000 rpm. Tampering with the turbo boost pressure can increase the speed to 200,000 rpm, which will lead to premature turbocharger failure.

Another possible cause is that the air cleaner element was removed and a foreign object has entered the turbocharger, or an inadequate aftermarket wide-mesh filter was used, allowing dirt into the unit. Any resulting imbalance of the turbine/compressor shaft can also cause turbocharger failure.

Generally speaking, the first indication of a damaged turbocharger will be a high frequency noise. A damaged turbo shaft will also lead to loss of power and high oil consumption.

B9 Tribeca Fuel Line Tool

A special tool is required to remove the fuel line on the Subaru B9 Tribeca. The tool, P/N 42099AE000, is available from your local Subaru N.E.W. Horizon dealer. Because the tool is small and may be easily misplaced, SOA advises that you keep it in a secure place, so it won’t become lost.