997 turbo problems ,

Simon911 · 28 Mar 2017

Hi guys
I recently bought a 2007turbo from a reputable Porsche specialist and I have no doubt that they will sort what ever is wrong. They have been very good over the years and the car in well with in warranty . So I'm not naming and shaming
The first issue, start up is load and sounds like a rattle, almost like there is no oil in the system. This noise disappears after 3-4 seconds. It is prolonged if I don't use the car for a week or so. A small amount of smoke also pops out and clears straight away. No more noise or smoke from then on
Next one is that it has gone into a transmission limp mode twice now after rolling up to a junction and then pulling away. It kinda jumps up to 3rd at the point it wants to change gear then down to 2nd and stays there. Needless to say it's a Turbo tiptronic and this happends in Drive mode and not manual.
Car has 56k and is fully serviced

Thanks

T8 · 28 Mar 2017

The first issue sounds like a "they all do that sir". Fingers-crossed for you.

The second issue may just be a simple gear selector problem. My 996T did that and it was sorted in half an hour.

Either way, good luck :thumb:

IMI A · 28 Mar 2017

You'll need to see the fault code on gearbox but its amazing with tips a simple filter and gear oil change does wonders.

The rattle on start up could be loose heat shield - very common. Good luck. Nothing serious and the puff of smoke is normal on mezger turbos :thumbs:

deMort · 28 Mar 2017

Noise is probably tappets or tensioners draining out and takeing a few seconds to refill .

3 - 4 seconds of Smoke on start up is pretty normal.

Tip fault might not be so straight forward but it will all depend on what fault codes they pull out of it as theres several things that might cause your fault .

basildon993 · 28 Mar 2017

I have an 07 Turbo, it has done 49,000 ish miles now and occasionally puffs oil on start up. Nothing to worry about, it is down to having a flat six engine that collects a little bit of oil in the bores when standing. Mine seems to do it at random though? Some mornings it does, most mornings it doesn't.

Mine also makes a quick tinny rattle on start up, been told it is a loose heat shield on my car.

Enjoy it! :thumbs:

apollokre1d · 28 Mar 2017

Demort said:
3 - 4 seconds of Smoke on start up is pretty normal. .

Mine does this too after its been standing for 2-3 weeks.

Simon911 · 28 Mar 2017

Thank s guys. The smoke I'm not to worried about as it clears and seems normal from every one I've spoken too .
The rattle on start up, seems the wrong sound as this is more like a dull tinny sound where I would expect a heat shield to be a higher pitch if you like. I did read on the forum that some one thought the noise could be the high and low lift cam sensor switching over just after start up?

Thanks for your help

MidlifeC2S · 28 Mar 2017

Sounds totally screwed and dangerous to use you may as well give it to me for nothing ;-)

isysman · 29 Mar 2017

Rattle as Dermot says is most likely tappets until the oil starts flowing. The longer you leave a Turbo the longer it takes to get flowing. When I first come home after a stint overseas my car sounds awful for a few seconds. I've taken to turning the engine on the key and stopping just before it kicks into life to just get the oil flowing. And the smoke is normal if not a bit embarrassing at times.

graemeho · 29 Mar 2017

isysman said:
Rattle as Dermot says is most likely tappets until the oil starts flowing. The longer you leave a Turbo the longer it takes to get flowing. When I first come home after a stint overseas my car sounds awful for a few seconds. I've taken to turning the engine on the key and stopping just before it kicks into life to just get the oil flowing. And the smoke is normal if not a bit embarrassing at times.

Yep, this happens on mine too. It's just a horrible noise that scared me to death first time I heard it. I can only leave it standing for 2 days before the dreaded rattle happens, then stops after a couple of seconds. Cracking it as you suggest seems a good tip :thumb:

I've thought about opting for a 0w-40 oil rather than the 5w-40 that's fitted to see if this helps. Theory (grasping at straws) is that maybe thinner oil will circulate quicker when cold and avoid or minimise the rattle. Then again if the oil is thinner is may drain quicker when stood for less time :dont know:

IMI A · 29 Mar 2017

Covered approaching 80,000 miles in mine over 10 years of ownership from new. No rattles from anywhere and the car has been left for 3-6 months without driving her on a few occasions :wink:

Martian · 29 Mar 2017

IMI A said:
Covered approaching 80,000 miles in mine over 10 years of ownership from new. No rattles from anywhere and the car has been left for 3-6 months without driving her on a few occasions :wink:

Aren't you on your second engine though Imi? :wink:

Jokes aside, mine often stands for 4+ months over Winter and no issues with rattling etc. In fact, it hasn't been started since mid-October and doubt it will be started until next weekend (5.5 months)! Odo' is on 42K.

IMI A · 29 Mar 2017

Martian said:
IMI A said:

Covered approaching 80,000 miles in mine over 10 years of ownership from new. No rattles from anywhere and the car has been left for 3-6 months without driving her on a few occasions :wink:

Click to expand...

Aren't you on your second engine though Imi? :wink:

Jokes aside, mine often stands for 4+ months over Winter and no issues with rattling etc. In fact, it hasn't been started since mid-October and doubt it will be started until next weekend (5.5 months)! Odo' is on 42K.

:grin: First one never rattled even when it let go at 175mph. Mezger turbos all sound like a bag of nails at idle but there's defo no rattles anywhere. Not bad for a 10 yr old car shows they're quite well put together. :thumb:

isysman · 29 Mar 2017

I think when he said rate he was talking about tappet noise on start up not something rattling.

NineExcellence · 29 Mar 2017

The basic rule is that as long as the noise disappears then it is normal. 997 Turbo engines tend to rattle a little more despite the improvements made on tensioners from the 996 Turbo.

The only time I would be concerned is if that rattle continues. The only real way of checking that is on a ramp with a stethoscope. For example you could have a partially block chain tensioner which can restrict oil supply and this can happy at any time. The tappets have springs in them and these can fail, but normally at higher mileage (50k plus). When we rebuild these engines, we tend to find that many inlet tappets fall apart when removing them.

I personally would be more concerned about the tiptronic box issue you mentioned. You need to get this sorted asap to avoid any damage. Even 50ml less of ATF can cause internal damage.

It is one of the reasons why these 20,000 mile schedules are so stupid imo. If you have a tiptronic leak (minor) that is captured by the undertray, you won't know until it is next serviced. Or you start getting shifting issues and damage can already be done.

Ken

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