Last post on Feb 12, 2008 at 2:17 AM
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Subaru Legacy, Engine, Wagon
#38 of 50 Clicking sound on Legacy 2008 2.5i
Jan 22, 2008 (6:29 am)
I bought a Subaru Legacy 2008 2.5i several months ago and have questions about engine noise.
When I turn the car off after driving, the engine continues to make a clicking sound for a while. It almost sounds like a faucet dripping (but there is no leak on the ground) or clicking sound which continues for a minute or two. Someone told me that this is the sound of the exhaust system cooling down. Is this true? I hear the same sound if I stop the car and put it in park but leave the engine on.... I don't hear it when just idling at a light (not in park).
Also, when I do I a cold start of the engine, it is very loud at first. The noise goes down significantly as the car warms up. After fully warm, the car is very quiet. Just wondering whether is normal or not and what other people's experiences were with both types of engine noise.
#39 of 50 Re: Clicking sound on Legacy 2008 2.5i [cjtech]
Jan 22, 2008 (9:03 am)
The clicking sounds are normal and tend to be louder when vehicles are new. It is just metal contracting as it cools. Sort of a slow, quiet symphony of *tink* *pop* *tink* *click* *click* *tink*. You hear the noises in park? Perhaps transmission components cooling, but yes, the majority of the sounds typically come from the exhaust and associated heat shielding once the engine is shut off.
As for noise on start-up, what sort of noise is it and at what temperatures do you hear it?
#40 of 50 Re: Clicking sound on Legacy 2008 2.5i [xwesx]
Jan 22, 2008 (10:40 am)
Thanks for the information on the clicking sounds.
The noise at start-up is not really an unusual sound... regular engine start-up sound but it is a lot louder than other cars I've had in the past... mostly Hondas. Once the car warms up, the engine sound is ok. Is this just typical of boxer engines?
#41 of 50 Re: Clicking sound on Legacy 2008 2.5i [cjtech]
Jan 22, 2008 (11:38 am)
The boxer engine is a noisier engine in general, but it should not sound... harsh. In sub-zero temperatures, the engine on my 08 Outback only exhibits the extra start-up noise for 15-60 seconds, depending on temperatures. The most notable noises when it is extremely cold (about -20 and lower) are belt and accessory complaints. I do not really blame them.
Some folks have reported PZEV engines running very rough upon cold start. I noticed on Subaru's website a few days ago that there is a TSB related to this, though I have not looked at it.
#42 of 50 Driver side Axle/CV Replacement
Feb 02, 2008 (4:29 pm)
I have a torn boot on the driver side of my 93 Legacy. How do you replace it? I am new to Subaru, so this is a first time? Thanks.
#43 of 50 Re: Clicking sound on Legacy 2008 2.5i [xwesx]
Feb 03, 2008 (9:21 am)
the TSB talks about the PZEV engine being tuned specifically for CA gas blends so if you are in another state with some different blend you may have some issues with rough starting etc. I have not had any problems with my 08 OB over 6k now and despite the recent few spells of subzero temps in IL. Maybe our gas blend is the same as CA. - or maybe I've been so used to my old 98 Legacy, even a non functioning 08 sounds good to me !!
There is also a TSB about a noise from the exhaust during startup which is normal and related to the lean burning also.
It seems people in the NW and New England are complaining most about the PZEVs. Is there gas there different from CA and the midwest??
#44 of 50 Re: Driver side Axle/CV Replacement [jmartinelli]
Feb 03, 2008 (5:07 pm)
They sell the CV+Axle Assembly as a whole unit. Cost is about $75 and takes about 2hrs to replace. It's not that bad a job.
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#45 of 50 Re: Clicking sound on Legacy 2008 2.5i [cptplt]
Feb 04, 2008 (6:39 am)
Where can I read the TSBs? Is there a public site where the TSBs are posted?
#46 of 50 Re: Clicking sound on Legacy 2008 2.5i [cjtech]
Feb 04, 2008 (9:28 am)
No, not really, but I did find this site. Subaru's web site allows you to see the bulletin numbers and titles, but requires payment to download them. I take the TSB from the Subaru site and run a search on it. That is how I found the site linked above.