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Old 11-20-2012, 01:29 PM   #1
srikid
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Default Is my engine shot? loud knocking sound... video inside

I picked up a 99 forester about 3 months ago from a friend for cheap. I fixed a few things (brakes, wheel bearing, o2 sensor) and have been driving it for about 2 months now and it now has about 200K miles on it. All of a sudden on my way home from work i heard a a loud ticking/knocking sound. Is the engine done? Is it worth swapping with a used one or just salvage the car?


I pulled the codes today and found: P0301, P0302, P0304, and P0341. I checked again today and it seems like the sound is coming from the middle of the right side of the engine bay. The knocking does increase and get faster as the RPMs increase

The car has a very rough warm up now when you first start it up for the first time. It never used to do that. When your first start it, it idles rough and shakes a bit but after a while it calms down and then just makes the knocking sound.

Any ideas where to go from where? P0341 is the camshaft position sensor. Not sure exactly where or what that is but should it be replaced?
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Old 11-20-2012, 03:36 PM   #2
TronDD
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Are all your plug wires attached tightly? Sounds like when I had one come loose. I didn't get any codes though. But since it's 3 cylinders and a crank sensor, you might have a larger root cause.

Tim.
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Old 11-20-2012, 04:03 PM   #3
Patrick Olsen
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Sure sounds like rod knock. I'd say she's done.
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Old 11-21-2012, 10:36 PM   #4
subi400
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That my friend is 100% done as in time for a used engine or a rebuild....

You can find some decently used NA ej25's for your year of car since it is most likely a single over head cam for the 99 forester. Or en ej22 from that year might work.
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Old 11-27-2012, 03:15 AM   #5
Charlie-III
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Yeah....sounds like a rod bearing or 2.
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Old 11-27-2012, 03:18 AM   #6
ShiftGear
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My friends 99 gc sounded like this when his engine was toast. Good luck
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Old 11-27-2012, 10:25 AM   #7
ilganeli
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Before you do anything else , try topping off the oil and see if it smooths out.
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Old 11-28-2012, 12:42 AM   #8
Charlie-III
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Quote:
Originally Posted by ilganeli View Post
Before you do anything else , try topping off the oil and see if it smooths out.
While that "may help", if it's making that much noise, it's just a matter of time before it's totally done.

There is a "slight chance" it's a bad TB tensioner, but I wouldn't bet on it. A bad TB tensioner usually sounds different.

PS, topping it off with 60wt oil will likely quiet the engine down some....sorta....for a little bit......
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Old 11-28-2012, 10:20 PM   #9
rs2.5-3.0
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I, too have a similar knock. Except I only hear it on partial on/off throttle, at start up, and sometimes at idle. Off the pedal and more than partial throttle (not free revving) I do not hear it. Could mine be the same issue, or other? '08 Legacy, 88k.

OP - sorry for the hijack. Figured I could get some answers since we may have a similar issue.
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Old 12-07-2012, 01:15 PM   #10
rs2.5-3.0
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I'm assuming it's the lifters... Thanks guys.

OP, what did you find out?
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Old 12-26-2012, 03:22 PM   #11
srikid
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Sorry for the delayed response but i finally got around to this. I took the TB cover off to find the toothed idler gear completely shredded!!! The inner ball bearings were all over the place and falling to the floor as I was taking off the cover.

If I order a TB kit and replace the components should I be ok? Could this have caused some other damage elsewhere? Dont want to invest the time and money on replacing timing belt components only to find out that this failed idler gear caused some internal engine damage as well. Any thoughts?

Here some pics of the failed gear:


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Old 12-26-2012, 05:52 PM   #12
GrundleJuice
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Is the timing off or is it still in time? A leakdown test is probably a good idea either way.
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Old 12-27-2012, 10:18 AM   #13
Patrick Olsen
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Wow! That's a toasted bearing, all right!

What else are you thinking of replacing? I suppose at 200k it would probably be prudent to do the water pump and TB tensioner while you're in there. So, while it would require some re-work, which I always find frustrating, I would try replacing just that idler pulley first to keep the cash outlay small. Make sure the cams are in time, as RaceFace mentioned, then try a compression test. If that looks good, take the belt back off and do whatever other things you want to do.

Pat
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Old 01-02-2013, 01:30 AM   #14
borderless-world
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can someone tell me what the hell these noises are that my engine makes?


the car is less than a few months old. has 146000kms and i have 3rd party warranty.
there are no visible leaks. i guess ill have a compression test done with fresh oil but the oil in there now has metal filings you can see them on the dipstick, it has had the valve cover gaskets on both ends changed. and new spark plugs.. 50km or so of driving later (somewhat harsh driving) im sitting with a dead subaru
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