Groaning noise pulling away from cold??

Groaning noise pulling away from cold??

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AMH82

Original Poster:

363 posts

187 months

Thursday 20th September 2012
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Strange one this, as usual, with a new car - I get paranoid about any achillies heel type issues, so since I've had my Blobeye I've been listening out for piston slap from cold.

After having a good listen all I tend to get is a tiny bit of a slap (if not slap, a rattle or some sort, maybe tap end), but literally just for a split second after cold start up - so I had let that one go.

Trouble is, last couple of days I have heard a new sound! From a cold start, as I engage the clutch and raise revs, there is a definite increase in noise (not just due to revs!!). Dificult to tell if it's a groan, or some kind of rattle. Only from cold, only as you pull away with revs, and once you have started moving, it goes away.

I tried tonight just now, revving with no load it sounds normal (as normal as a cold running scoob does), lifting the clutch at fast idle - sounds normal. Give it a little bit of revs and it makes the noise.

I'd put it down to engine load, and maybe a rattle of some sort, but I'd have thought you would hear a rattle without load if it was anything untoward.

I'm at a bit of a loss to what it could be, considering it goes away once you have pulled away!!! Anyone had similar??

TITWONK

530 posts

173 months

Friday 21st September 2012
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Only when you depress your clutch pedal?

ScoobieWRX

4,863 posts

232 months

Friday 21st September 2012
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Could be as simple as a clutch release bearing that's a little noisy when cold and doesn't quieten until warm, won't be the first time nor the last. My clutch bearing isn't the quietest but it works perfectly and will no doubt outlast my clutch.

Only if it's really really noisy loud all the time (maybe it's gone dry or has worn out) it might need changing but they usually last as long if not longer than most clutches.

I think you may be listening out for stuff that you think means something and you end up hearing stuff that means nothing. Every day you drive the car you will hear more and more noises as you get to know your car and start trying to identify what it might be and if there is something wrong when it might actually be the car running normally.

If you've had the car a long time and these noises suddenly happen then maybe you have a point, but if you've not had it long i wouldn't worry about it unless something gets louder wink

If these noises are worrying you that much get someone in the car with you from cold start first thing that knows subarus, and ask them to listen to what you hear.

Other than that stop feeling so paranoid about these little noises and enjoy the car! hehe

AMH82

Original Poster:

363 posts

187 months

Friday 21st September 2012
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Haha! It's how I'm wired, I think being an engineer, when you hear something out of turn it will annoy you until you can suss what's wrong!!

Anyway, low & behold, today it is not doing it - so it's obviously nothing major at the moment.

I don't think it's the release bearing, as there is no noise when depressing the clutch in neutral. It literally just made a noise whilst taking up the engine load.

From reading araound other places, and other descriptions, I would put money on a dry spigot bearing in the flywheel. If it starts to get constant or louder then I'll bite the bullet and drop the gearbox, and do the clutch & bearings at same time. It's on 70k so false economy not to replace clutch at same time.

I very rarely use garages, and was having a good read about what's involved with removing the gearbox on these. Sounds OK as long as I can get the car high enough and get another pair of hands removing the box. I've done a couple of FWD cars now, but never a RWD/AWD car.

For future reference, what method have people used for removing the box? Trolley jack underneath supporting gearbox (with another supporting rear of engine), and ease it out, or another method I've heard is to use a hoist to support the front of the gearbox, and a trolley jack on the rear to guide it out?

ScoobieWRX

4,863 posts

232 months

Friday 21st September 2012
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Very DIY job but does need another pair of hands to help with the gearbox although i've done mine on my own with a gearbox jack and on proper ramps so nice and high. Easy and very straight forward job though.

If you have access to a pit it would be just as easy and then get a mate to help with the box. It's a crap job to do on your back on a cold hard concrete floor!! Fine when i was a yoof but these days my constitution has withered away and i prefer a nice warm garage and ramps. smile

I've got a gear shaft spline i use to align the clutch if you need an alignment tool, failing that use your finger. hehe

ETA: Just read the rest of your post properly. Same as any other RWD/FWD gearbox you've removed only get the front drive shafts out first, then the propshaft, then unscrew the big bolt that goes through the clutch lever on the top of the box otherwise when you pull the gearbox off it will damage the pressure plate and bearing as they are permanently attached never mind not be able to pull the gearbox away from the engine, remove the starter motor and undo the bell housing bolts last of all.

Leave the engine alone because you want it to tilt down at the back so you can get the box in and out. Please tell me you're not doing it on the deck. Glutten for punishment!!

There are places you can hire a proper ramp for the day and get a mate to give you a hand. When you know what you're doing it's a 4.5hr job. For your first time allow a day and do not forget to get a clutch kit and new Flywheel otherwise you'll need to get your Flywheel skimmed when you get it off.

Oh yeah....Don't forget the gear linkage hehe

Edited by ScoobieWRX on Friday 21st September 18:58