Falcon911

@justinbAUS Are you smoking from both tail pipes or just one? Both would more likely point to the AOS.

GC996

These engines are pretty damn durable but their are 3 catastrophic failure points that are easily solved for and therefore prevented.

1. IMSB failure. Easy to solve, just replace the oem IMSB with an LN Retro or Solution.
2. Water Pump failure which can lead to possible head/cylinder cracking. Easy to solve, just replace the water pump every 5 years.
3. AOS failure which can lead to exhaust smoking (not catastrophic but it is a pita and can lead to your cats going bad), the possibility of intermix when the aos starts to deteriorate, as well as in extreme cases which are typically on the track or aggressive canyon carving when too much oil gets in the cylinders and the pressure cracks them which is also known as hydralock. Easy to solve for, just replace your AOS with the UAOS track.

The fourth failure is a slow failure known as bore scoring. This can be easily solved for by running great oil, changing it at least 2x a year, making sure your fuel injectors are in great shape and functioning properly.

My guess is your smoking is from over filling your engine oil coupled with the oem AOS inability to process it. Common Issue.

But your indy is probably suggestingvthat they look at your cylinders to make sure that they arent cracking, which is probability a low probability event. Besides, you would most likely see it with intermix. If you go that route might as well get the bores scoped to check their condition for bore scoring so you can further sleep at night.

I can't emphasize enough how durable these engines are if you solve for the 4 items listed above. Further, I wouldn't jump to any negative conclusions. Sure, anything can happen, but in reality, they are low probability events.

GC996

Justin, I just saw you had another thread on Gulf oil and you sent out a UAO. Have you received the results back yet?

justinbAUS

Both.

I threw it up on YT

wdb

Yikes! Oil smoke is bluish and smells... oily. Coolant "smoke" is whitish and smells sweet-ish. I'd pull that AOS line as mentioned earlier. Also a manometer isn't expensive and can be a good excuse to buy a blingy oil cap.

robroy72

Does it eventually stop smoking after startup, or is it continuous?

justinbAUS

Only just sent that off. These guys usually take around a week. Will post when results are in.

justinbAUS

Hi - Only ran it for the length of the video and then stopped it. Haven't started it since.

justinbAUS

Hi - thank you for the time you spent on this (and all of you for that matter)

Car has IMS solutions (for the last 8 years) / water pump 3/4 years ago, and the engine had a refresh.

When the indie resolved the oil leak (it was from the IMS cover plate gasket) and replaced the clutch I had them replace the AOS as I did experience the smoke within the first week. Not as much smoke as this, however. The indie changed the oil/filter. The oil level was spot on max with the stick and sensor. And from everything I've read (my car is 2004) it has the newer dip stick for the reduced level recomendation. It subsequently had 250km of big squirts (2nd/3rd gear to 7k) on sweeping bends with my friend following. We switched cars and I followed the P and we both noted zero smoke. This event only occured Sunday night

As for 'great' oil. That's turning out to be a PITA. Everything that Lake Speed Jr recommends (Driven, Motul x-cess gen2) as well as others just isn't sold here in Australia. Redline is available but that comes to $300 for 9L (quart is 0.948L) and no idea how long it has been sitting on the vendor's shelf. So I've sent off a virgin oil sample of what the indie is using - Gulf ULE 5w-40

One thing I cannot get my head around is how sensitive these cars are to oil level and how it affects the AOS. I've looked for some YT videos to try and explain it to me but not found anything. Is is only an issue on high revs? with/without wide open throttle? or high G's?

Cheers

GC996

I defer to Skip (@Porschetech3) who would be the guy to answer the engineering side of the AOS. While it's a big pita when it happens, its no big deal to put a better one on.

dporsche74

china parts are garbage for evry bramd.. ... need to buy 3 and one will work;; maybe.. NOS is best as always.

Porschetech3

That smoke video sure does look like oil smoke...

Yes I have shipped UAOS Systems to Australia before, and all over such as Canada, South Africa, all over Europe and Asia.....The shipping cost is about $70 usd , and doesn't count for your Country's Taxes/Duties/Customs because they are all different so I don't mess with that, I just handle the UPS Worldwide shipping cost. You have to deal with your Countries Import rules ...

As far as the installation goes , the UAOS System is Plug-N-Play, only two more screws to have to R&R's from the OEM AOS system, and with the Track Drain Option you have to install the new oil fill tube provided also...

Any competent Professional who is familiar with replacing an OEM AOS can install the UAOS System...It's very straightforward...

Also since this is a fairly new engine I would suggest to get your Tech to make sure the scavenge pumps are installed correctly ( oriented correctly) and working properly just to be safe...

justinbAUS

Thanks - how does one check that the scavenge pumps are installed correctly? remove sump? how would you know that they're not installed correctly without getting into the engine?

Porschetech3

The scavenge pumps have the number 1-3 and 4-6 cast on them 180* apart ( opposite sides)

Bank 1 ( drivers side in the US) should have the 1-3 facing towards the crankshaft...

Bank 2 ( passenger side US ) should have the 4-6 facing towards the crankshaft ...

These can be seen just by looking at them......There are several threads in the archive on this issue with very good visual pictures...

justinbAUS

Hi so quick update. Started the car this morning and lots of smoke that settled after 10-15 seconds. Little blip of the throttle and more smoke. So had it towed to the indie.

Got an email from the indie. Their words

we wait and see.