2003 Boxster Engine Blew Up

[Smallblock454]

Originally Posted by beefoodie

@boxtaboy - my car started smoking in the middle of the fwy and then totally stopped and i couldn't start it anymore after that.

Sorry guys, but that doesn't sound like an AOS problem.

Regards, Markus

[JFP in PA]

Originally Posted by Smallblock454

Sorry guys, but that doesn't sound like an AOS problem.

Regards, Markus

Unless it inhaled liquid oil and hydro locked...........

[Deserion]

Originally Posted by Smallblock454

Sorry guys, but that doesn't sound like an AOS problem.

Regards, Markus

I respectfully disagree, Markus.

Personal experience here: Mom's '06 987 base started doing a Batmobile impersonation (smokescreen) on a country road, and she immediately pulled over/stopped once she saw that. The car wouldn't restart or turn over after she had shut it down (she did listen to dad on not ignoring things).

Turns out, yes, the AOS went. Oil out the exhaust, and in parts of the engine bay. A new AOS, spark plugs, cleaned MAF/TB/intake, oil change and it's been running awesome since November when it was repaired.

[DWBOX2000]

Sorry to hear. That blows.

If you put a positive spin on it, you can upgrade to a 911 motor or even a non porsche engine.

Best of luck with whatever you decide.

David

[beefoodie]

Originally Posted by DWBOX2000

Sorry to hear. That blows.

If you put a positive spin on it, you can upgrade to a 911 motor or even a non porsche engine.

Best of luck with whatever you decide.

David

So, I was thinking that same frame of thinking - i have a 2003 boxster - can i put a 911 engine on it? maybe a2009 or higher or is there a limit to what engine will fit on a 2003 boxster. how do i find that out?

[JFP in PA]

Originally Posted by beefoodie

So, I was thinking that same frame of thinking - i have a 2003 boxster - can i put a 911 engine on it? maybe a2009 or higher or is there a limit to what engine will fit on a 2003 boxster. how do i find that out?

Because the later cars are DFI, the entire fuel system, not to mention the electronics, are totally different, so you really do not want to attempt that as it would quickly become a one-off money pit. You would want to stay with an 03-04 engine.

[geraintthomas]

You'd know if your engine blew up. Doesn't sound like it to me.

Get it checked out, it might be repairable for a fraction of what you'd think it would cost.

[BFeller]

Originally Posted by geraintthomas

You'd know if your engine blew up. Doesn't sound like it to me.

Get it checked out, it might be repairable for a fraction of what you'd think it would cost.

I also wonder if it was a catastrophic failure or the Air Oil Seperator (AOS). A porsche experienced mechanic needs to look at that engine.

[Myoung73]

I was thinking aos failure as well. And that will cost your around $500. Take it to a Porsche specialist!

[thom4782]

Ask the mechanic if he found metal in the filter and oil sump. If it's free of debris, then the failure may not be catastrophic. If there's hope, take it to a top notch Porsche mechanic and spend an hour or two in labor for a deeper look. As someone said, an AOS failure can look terrible as smoke pours out of the exhaust. Maybe you'll just get lucky.

[Gelbster]

Good source of diagnostic :
Tony @ Callas Rennsport in Torrance.
Close to Venice and probably the best M96 engine expert west of the Rockies.
I PM'd you a local used engine for $1800.

[Fintro11]

Take out the spark plugs

[Gelbster]

Originally Posted by Fintro11

Take out the spark plugs

Something missing? That will certainly stop the AOS from smoking but may not solve the problem :-).

[Retroman1969]

Hmmm... I hope it's something like that instead of an IMS failure. What I've heard about AOS issues is that they can cause serious smoking, oil dumping, and potential hydro lock.
The AAA guy might be excellent, but these cars have so many odd quirks about them that a good examination by a specialist Porsche indy shop is really necessary before you proceed. Best of luck!

[BirdDog]

I'm no expert, but if I were you I would have it towed to a Porsche mechanic to determine if you had an IMS failure or if it was the AOS. As others have mentioned, an AOS failure will cause a bunch of smoke, the engine will die (and most likely not restart), and can cause oil to drip out of a bunch of places. That AAA mechanic might not know these engines and could misdiagnose this as an IMS failure (because hey, he read about the IMS problems on the internet, so that has to be what happened!) If it turns out to be the AOS, get that fixed by a Porsche mechanic and then think about having the IMS done.

[Smallblock454]

Hi,

OK - after some thinking. It may not restart directly after an AOS failure if the engine is hot and the engine has sucked in a huge amount of engine oil. But to get hydro locked, the amount of engine oil really has to be huge

Also if the AOS failed the engine would run rough at idle, because there is a leak in the negative pressure system of the engine case. And if cold it would start maybe badly.

So an easy test would be first to inspect the throttle body. If you find lots of oil in the throttle body that may lead to an failed AOS. Throttle body should be cleaned. Next would be to inspect the AOS (the AOS separates engine oil from intake air) and replace it.

You've said that the car has stand for some years. So maybe the diaphragm of the AOS decomposed while the car was not used for a long time (hope decomposed is the right english term).

Next would be to remove the coil packs and sparks. All sparks should look oily and burned and have a crust. If it's only one spark that looks oily or all sparks of one cylinder bank look oily and the rest looks OK, than it's not a simple AOS problem.

If all sparks look oily and crusted the engine should be turned over without sparks for 30-60 secs so the oil gets out of the cylinders. For a test you can try to clean the sparks with a copper brush – maybe it's better to replace them. Electrode distance should also be checked.

If you have the tools, i would do a compression test at this point (when spark plugs are out) - just to make shure every cylinder works properly.

Than i would drain the oil and check the oil filter. If you find fine metal debree or plastic parts in the oil filter (you have to cut it and roll it out), than there might be another problem.

If there is nothing conspicuous, put a new oil filter in fill up the oil and start the engine. It should run and i would say happy boxstering.

If you find a lot of fine metal debree or plastic parts in the oil filter (you have to cut it and roll it out), than there might be another problem.

In that case there is more than a failed AOS, so you should remove the oil pan and inspect for more debree. If there is more, you have to look where it's coming from. A failed IMS bearing can be the cause for it.

As you can see there are some steps to do to diagnose the reason for the failing. That can't be done in 10 or 15 minutes. So a mechanic will need some time to do it properly. And if it's a failed AOS the amount of money you have to throw into the car is much less than you have to throw in for a new engine. So i would recommend to diagnose everything very properly before doing any investment.

Hope that helps. Good luck!

Regards from Germany
Markus

[beefoodie]

Originally Posted by Smallblock454

Hi,

OK - after some thinking. It may not restart directly after an AOS failure if the engine is hot and the engine has sucked in a huge amount of engine oil. But to get hydro locked, the amount of engine oil really has to be huge

Also if the AOS failed the engine would run rough at idle, because there is a leak in the negative pressure system of the engine case. And if cold it would start maybe badly.

So an easy test would be first to inspect the throttle body. If you find lots of oil in the throttle body that may lead to an failed AOS. Throttle body should be cleaned. Next would be to inspect the AOS (the AOS separates engine oil from intake air) and replace it.

You've said that the car has stand for some years. So maybe the diaphragm of the AOS decomposed while the car was not used for a long time (hope decomposed is the right english term).

Next would be to remove the coil packs and sparks. All sparks should look oily and burned and have a crust. If it's only one spark that looks oily or all sparks of one cylinder bank look oily and the rest looks OK, than it's not a simple AOS problem.

If all sparks look oily and crusted the engine should be turned over without sparks for 30-60 secs so the oil gets out of the cylinders. For a test you can try to clean the sparks with a copper brush – maybe it's better to replace them. Electrode distance should also be checked.

If you have the tools, i would do a compression test at this point (when spark plugs are out) - just to make shure every cylinder works properly.

Than i would drain the oil and check the oil filter. If you find fine metal debree or plastic parts in the oil filter (you have to cut it and roll it out), than there might be another problem.

If there is nothing conspicuous, put a new oil filter in fill up the oil and start the engine. It should run and i would say happy boxstering.

If you find a lot of fine metal debree or plastic parts in the oil filter (you have to cut it and roll it out), than there might be another problem.

In that case there is more than a failed AOS, so you should remove the oil pan and inspect for more debree. If there is more, you have to look where it's coming from. A failed IMS bearing can be the cause for it.

As you can see there are some steps to do to diagnose the reason for the failing. That can't be done in 10 or 15 minutes. So a mechanic will need some time to do it properly. And if it's a failed AOS the amount of money you have to throw into the car is much less than you have to throw in for a new engine. So i would recommend to diagnose everything very properly before doing any investment.

Hope that helps. Good luck!

Regards from Germany
Markus

Markus, you were so right in your diagnosis, its amazing! Thank you for all your tips! My porsche mechanic figured it out quickly

[Smallblock454]

Originally Posted by beefoodie

Markus, you were so right in your diagnosis, its amazing! Thank you for all your tips! My porsche mechanic figured it out quickly

Good to hear that your car is back on the road. And thank you beefoodie, but i think your thanks should also go to 911monty, BFeller and JFP in PA who came up with the idea of an AOS failure and especially to JFP in PA who came up withe the idea of a hydroloc. I only put things together.

So happy boxstering again.

Regards from Germany
Markus

[PaulE]

Brenda, you need a qualified independent Porsche specialist - both to diagnose the issue and to do the repair - whether it is fixing the engine you have or locating a suitable used engine and putting it in for you. And if the engine does need replacing and you decide not to do that, they may be able to assist you with selling the roller for the best price. Good luck and let us know what happens.

[Gelbster]

"I am getting it towed to a Porsche specialist next week"
If you let us know the name of your "Porsche Specialist" , the guys here will let you know if he deserves the title.
The are lots of places that service & repair Porsches. Very few would qualify as both honest & competent M96 experts.M96 is the tech name for the engine your car has. It is significantly different from many other Porsche engines. And it is quirky -hence the need for an M96 specialist ,not just a Porsche specialist.