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  #1  
Old 5th March 2009
rg627 rg627 is offline
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Default Timing belt/chain: When to change?

Hi

My 9-3 Aero 2.0T Auto is approaching 93,000 miles, on what I presume is a standard timing belt/chain.

At 80,000 the mechanic informed me that it did not need changing yet.

What mileage should I change it at?

Cheers

Russ
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  #2  
Old 5th March 2009
AKS AKS is offline
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we have timing chains, no need to replace.
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  #3  
Old 5th March 2009
rg627 rg627 is offline
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even at near 100,000 miles?

Mine is starting to sound a little rattley at idle.

Cheers
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  #4  
Old 5th March 2009
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CallipNCSUsaab CallipNCSUsaab is offline
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the serpentine belt the manual states at 60k. Mine looked fine but I ended up changing it at 76k.
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  #5  
Old 5th March 2009
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+ 1 to the AKS post.
chains, in theory, aren't replaced. Belts are...

that rattling you're hearing could be a number of things. Do you have a manual tranny? Could be clutch plate thingy-majigger. Try depressing the clutch all the way and see if the rattle disappears.
If its auto, then could be something exhaust related. These cars rattle non-stop
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  #6  
Old 5th March 2009
JonV JonV is offline
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Quote:
Originally Posted by rg627
even at near 100,000 miles?

Mine is starting to sound a little rattley at idle.

Cheers
There is a TSB on timing change noise, it has to to with sludge...how often do you change your oil?
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  #7  
Old 5th March 2009
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In the ng900 (and I suspect SS's, given the similarity of the motor) you could check the chain health by taking the chain tensioner out and seeing how far it had ratcheted out. I'm sure the WIS will give a spec, can any WIS owners confirm this?

Mostly, I agree with the others who note that the chain should be OK for well over 100K, and most of us will never have a need to replace one. However the ng900 folks do have failures and it's worth ruling out. To read more, search on "rattle of death" in the ng900 forum.
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Old 6th March 2009
Cosmicflash Cosmicflash is offline
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Both engines have a timing chain--no service interval. Pretty much the life of the engine.
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  #9  
Old 6th March 2009
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Quote:
Originally Posted by Cosmicflash
Both engines have a timing chain--no service interval. Pretty much the life of the engine.
"Both" engines? There are more than 2 over here

To clarify, the petrol (gasoline) engines use a timing chain. As suggested above, I'd get them to check the top tensioner as it may require adjustment. Chains normally give plenty of warning that they are failing, unlike timing belts (though this is not always the case - VW VR6 engine for example). As Cosmic says, there is no fixed change intervals for timing chains, and in fact they can last the lifetime of the car without trouble.

Although the OP was asking about the 2.0T, for info, the diesel engines do have a timing belt and not a chain, and the change interval is every 60K miles I believe.
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  #10  
Old 6th March 2009
phred923 phred923 is offline
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I had some noise as well, ended up being the tensioner not "fully engaging" which was causing chain to bang against the guards, thus damaging them. Luckily still under warranty (CPO) so all was covered, and even changed the belt while they were in there, for the cost of the belt only.
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  #11  
Old 7th March 2009
rg627 rg627 is offline
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cheers guys.

The car is an automatic, petrol.

It's mainly at idle you can hear it rattle.

Oil is changes at 10,000 miles. Plus change it last week and its still rattling a bit.

I guess you could describe it as similar to a diesel engine noise (from inside the car) but a lot quieter.


Thanks
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  #12  
Old 7th March 2009
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OK, well I agree that it's definitely worth checking out. It could be something minor, maybe an accessory or shield that rattles when cold. Check on the ng900 forums, perhaps someone has posted an audio file with chain rattle. Because their cars are older, they're more likely to have experience with this. The motors are reasonably similar.
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  #13  
Old 7th March 2009
rg627 rg627 is offline
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cheers guys

I will have a look
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  #14  
Old 12th November 2010
mikester540 mikester540 is offline
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I apologize for posting to a very old thread--

but I came across this and I have a similar issue (hindrance more so.)

I recently purchased a 2004 Saab 93 2.0t Linear @ 58k miles... and it has the same 'rough idle' almost diesel sounding noise that 'rg627' mentioned. It doesn't sound like a diesel truck outside of the car, but inside it has a very distinct diesel idle sound.

Any idea on what it could be?

Thank You and sorry for bringing up such an old post.

Mike
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  #15  
Old 12th November 2010
TunnanXWD TunnanXWD is offline
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Have you tried a new muffler?

On yer' wife. They tend to rattle on and on about nothing at all.
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  #16  
Old 12th November 2010
mechone mechone is offline
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Default timming chain hydraulic tensioner

It is more than likley the tensioner is seized quite common,it can come apart and be cleanned, but you must be careful your timming dosn't jump.
It's the big nut 1 1/8 on passenger side of engine at rear.
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  #17  
Old 13th November 2010
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Are V6's the same with the timing chain as well?
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  #18  
Old 13th November 2010
JonV JonV is offline
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The 2.0T/t 93SS has two Internal timing chains designed to last the life of the engine..... the Serpentine Belt should be changed every 60K and the tensioner adjusted or replaced.
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  #19  
Old 13th November 2010
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Quote:
Originally Posted by rg627 View Post
even at near 100,000 miles?

Mine is starting to sound a little rattley at idle.

Cheers
You need a tensioner - unless you have been driving your car REALLY hard, the timing chain should last the life if your cylinder walls and piston rings. It takes a LOT of torque or a lot of outright abuse to stretch a timing chain. I would have the chain tensioner checked.
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  #20  
Old 1 Week Ago
Doranso Doranso is offline
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Hi, This may be an old post but new to me, I'm trying to determine if my
93 Vector 1.8t cabriolet 07 plate with 40,000 miles has a timing belt or chain

If belt can anyone advise the replacement period, is it 7 or 10 years
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