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Knocking noise...
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Old 06 Oct 2008, 08:39 AM   #1 (permalink)
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Knocking noise...

Hi There, was racing a porsch lastnite on the motorway with my impreza sti type r v4 and was doin over 150mph wen all of a sudden engine started to knock wen slowing down. I lost abit of power den the car cut off. now wenever i start the car it just knocks very loud. any ideas guyz?
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Old 06 Oct 2008, 08:45 AM   #2 (permalink)
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Re: Knocking noise...

Take a look at the video in the first post of this thread.

http://www.subaru-impreza.org/forum/...ne-broken.html

Does it sound like that? If so read on through the thread. Either way you'll need to get it looked as ASAP. I'm afraid it doesn't sound too good.
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Old 06 Oct 2008, 08:49 AM   #3 (permalink)
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Re: Knocking noise...

yeh it sounds similiar to that just abit louder. i just had my headgaskets done 1 month ago. so does that mean il have to replace everything again?
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Old 06 Oct 2008, 09:02 AM   #4 (permalink)
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Re: Knocking noise...

It means you may need your crankshaft and possibly other bits replacing. This will require the engine being stripped down and a rebuild.

Best thing you can do is get a decent mechanic to have a listen/look and see what they think. It'll probably need stripping anyway to find the problem.

I hope I'm wrong as rebuilds are very pricey. From reading about others experiences 2,500 - 3,000 seems to be about what you will be looking at. As I say though, get someone to take a look.
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Old 06 Oct 2008, 04:48 PM   #5 (permalink)
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Re: Knocking noise...

Dosnt sound to good really rebuild, all depends whats broken..................... bad luck
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