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Old 07-01-2005, 01:35 PM   #1
tompetey
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Member#: 73034
Join Date: Oct 2004
Location: Rochester, NY
Vehicle:
MY02 OBS

Default engine problems - i think

Car: MY02 Impreza Outback Sport, 88,000 miles, auto transm.

A while back a started hearing a knocking noise - not very loud but noticeable. It went away within 5 minutes (after "warmed up") so like a total fo 10-15 minutes depending on temp.

I tried sourcing engines but they were all either under the recall notice for the coolant issue or simply too expensive.

Luckily, the sound started going away but it has since returned.

When I begin accelerating (not fast - just regular acceleration), I hear like metal bb's rattling around. The car seems to have lost a lot of torque over the past few months.

What's even stranger is that my transmission seems to be shifting either really late or really early but never at an optimal point.

I am starting to wonder if it could be my tranny and not the engine...

Any ideas?
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Old 07-01-2005, 02:56 PM   #2
Matt Monson
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Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

Sounds like 2 separate issues. Rod knock and maybe a torque converter that is on it's last legs.

Engines under the recall aren't necessarily going to fail, especially if they are lower mileage. My HG didn't go until 100k. And if the price is right, you can get a pair of HG's for $70, and replace them before you even drop the motor...
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Old 07-01-2005, 03:09 PM   #3
tompetey
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Join Date: Oct 2004
Location: Rochester, NY
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MY02 OBS

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How hard is it to swap HGs? Do I need new bolts since I've heard they "stretch" and have to be replaced for proper torque? I am not worried about the actual engine swap but I am yet to take one of these bad boys apart for hg work. Any experinced advice you can offer?
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Old 07-01-2005, 03:10 PM   #4
tompetey
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Member#: 73034
Join Date: Oct 2004
Location: Rochester, NY
Vehicle:
MY02 OBS

Default

what does a torque converter "do"?
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Old 07-01-2005, 04:25 PM   #5
Matt Monson
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Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

There's an active thread today about head bolts. But the answer is you don't need to change head bolts.

The torque converter is the automatic equivalent of the clutch. It is how the power is transferred from the engine to the tranny driveshaft. When they get tired, they don't hold proper pressure or spool up properly. You can read about them in more detail in the tranny forum...
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