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Piston Slap


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11 replies to this topic

#1 bkcraun

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Posted 10 November 2006 - 10:15 AM

Is it supposed to go completely away when the motor warms up? Mine does not. It does get much quieter, but I can still hear the tick-tick-tick.
What should I do?
Oh, it's the 04 Forester that has it. Only 24,000 miles too. :(

#2 Manarius

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Posted 10 November 2006 - 10:25 AM

Tick Tick Tick isn't piston slap, it's sticking HLA's.

#3 wondercow2

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Posted 10 November 2006 - 11:07 AM

Tick Tick Tick isn't piston slap, it's sticking HLA's.


I thought it was all solid lifters in 2.5s and phase II 2.2s?

#4 Takami826

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Posted 10 November 2006 - 11:25 AM

My 97 Legacy has always done that tick tick tick thing. I figured it was another quirky Subie.

#5 brus brother

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Posted 10 November 2006 - 11:36 AM

Looks like you are still under warranty (04 with 24,000 miles) . I would get thee soon to a dealer and pitch a bit@h.:headbang:

Is it supposed to go completely away when the motor warms up? Mine does not. It does get much quieter, but I can still hear the tick-tick-tick.
What should I do?
Oh, it's the 04 Forester that has it. Only 24,000 miles too. :(



#6 jon38iowa

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Posted 10 November 2006 - 01:20 PM

Is it supposed to go completely away when the motor warms up? Mine does not. It does get much quieter, but I can still hear the tick-tick-tick.
What should I do?
Oh, it's the 04 Forester that has it. Only 24,000 miles too. :(

I agree! Moreover, I recomend also complaining in writing. Don't let them get away with the old, " thats just how Subarus are." My friend has a '00 outback, with 80k, 2.5, with nary a tick.

#7 nickb21

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Posted 10 November 2006 - 01:58 PM

Has this just started with the colder weather? I notice that during the colder months I'll get more of a 'knock' (not really a tick) on startup that goes away.

I've noticed a ticking sound on my '02, but i'm pretty sure it's just the injectors... I believe that a bad timing belt tensioner might also tick excessivelyif it's bad.

Def let the dealer know, esp with such low mileage.

#8 wondercow2

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Posted 10 November 2006 - 02:22 PM

A bad new-style tensioner will sound much louder than typical suby piston slap or lifter ticking. It has a definite metal-on-metal sound that clearly comes from behind the timing belt cover. Start to diagnose the problem by listening to the engine and trying to hear where the noise is coming from.

#9 bkcraun

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Posted 15 November 2006 - 11:25 AM

It's going back to the dealer tomorrow. I'll let you all know what the prognosis is.

#10 bkcraun

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Posted 16 November 2006 - 08:39 PM

Well the dealer's diagnosis was piston slap. They said the tolerance was such that I will be getting a new short block in a week! Didn't even have to argue. Kinda nice.

#11 brus brother

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Posted 16 November 2006 - 10:42 PM

Yippee... I love a happy ending.

Well the dealer's diagnosis was piston slap. They said the tolerance was such that I will be getting a new short block in a week! Didn't even have to argue. Kinda nice.



#12 Strakes

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Posted 17 November 2006 - 04:33 PM

Glad that things are working out for you! Sounds like you have a good dealer.




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