![]() Just an update, I heard the noise again for a very brief moment after the car was driven for a while, but ONLY when I went in reverse, which now makes me wonder if the issue is the CVT (considering for my 2012 Subaru and I'm guessing other Subarus there was an extended 100k/10 year warranty issued. The timing belt tensioner is isolated from the engine oil supply. Maybe I should check the timing belt ASAP before driving it to make sure it's OK and that the belt isn't stretched or frayed (looking through the viewing hole on the left side/taking off the timing cover on the right.) ![]() I guess at 97,500 miles, I should just do an entire timing belt kit replacement!? I definitely plan to get this checked out soon, but I won't be able to do this for another few days. Any thought on what's up? It seems probably like an engine issue, and I'm guessing a timing tensioner issue, since they are (I think) oil pressurized (the logic being, adding more oil seemed to immediately fix the problem.) ![]() After this it went completely awayĪfter the second day I checked my oil dipstick and it was low so I topped it off with a quart, and now when I check it cold it's on the "high" end of the dipstick.Įver since doing this, I haven't noticed the noise even at a cold start before the car warms up, nor have I noticed any other noises. Test-drive the vehicle to confirm the repair.But maybe a little lower. Verify correct timing of the belt, camshaft and crankshaft after tensioner and/or bracket installation.Ħ. It is also possible for the tensioner pulley or bearing to wear out, in which. If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started. The most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner. If the cylinder body of the timing belt tensioner does not have a wear notch, replace the timing belt tensioner bracket.ĥ. Grinding or squeaking noise from the belts or tensioner. If so, replace the timing belt tensioner. If the engine number is 572570 for SOHC or 572928 for DOHC and before, check to see if the cylinder body of the timing belt tensioner has a wear notch. If the engine number is 572570 for SOHC or 572928 for DOHC and after, replace the timing belt tensioner bracket.Ĥ. Inspect the belt tensioner if the cylinder body of the timing belt tensioner has a notch from wear, the tensioner will need to be replaced (see Figure 2).Ĭaution: Review timing belt and tensioner removal and replacement procedures in OEM manual or ALLDATA Repair, prior to removing tensioner or tensioner brackets.ģ. If noise can be heard, it’s either coming from the tensioner or bracket. Confirm if the noise is coming from the upper portion of the timing belt tensioner by using a stethoscope. If the noise can be heard from around the timing belt cover area, there is a possibility that the noise is coming from the timing belt tensioner.Ģ. With the hood raised, listen carefully where the noise is coming from. Identify if the noise is coming from the timing belt tensioner or tensioner bracket when the engine is cold.ġ. Lot number of belt tensioner: 020402 and after. Theres also a chance you might hear this when youre idling. Most often it will occur when youre accelerating or braking. Unlike the ticking sound it makes when it fails, these sounds will not be continual and will probably only happen at certain times. Identification of countermeasure belt tensioner: The color of the paint dot on the pulley bolt was changed from “Blue” to “Green” (see Figure 1). However, your timing belt may also make intermittent squealing noises. SOHC 2.5L Engine Part Name New Part Old PartĭOHC 2.0L and 2.5L Engine Part Name New Part Old PartĪ countermeasure was made to the timing belt tensioner, which has been incorporated in production since April 5, 2002.Ī new heat treatment procedure was used to improve the hardness of the surface at the plunger to prevent poor sealing. Production Line Change: The new-style tensioner brackets were used in production starting in February 2004.Īffected Vehicles: Model Body VIN (Starting) On DOHC engines, the shape of the bracket was changed and ribs were added to increase rigidity. On SOHC engines, the shape of the bracket and the size of the two (upper side) installation bolts were changed. This tech tip describes a modification made to the timing belt tensioner bracket to prevent the knocking noise. ![]() Some Subaru drivers may complain of a knocking noise, which seems to be coming from the engine.
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