Frequent blue smoke on startup and Motorsport AOS? UPDATED...
05-13-2011, 05:12 PM
#31
Burning Brakes
The scoring is the result of poor design, simple as that. The 3.4 engine has graduated coolant channels, getting larger as you go around the engine from cylinder 1 to 6. On the 3.6 the channel and gasket holes are all the same size, resulting in cylinder 6 not getting as much coolant flow as 5 which doesn't get as much as 4 etc etc etc. The scoring is evident on the thrust side of the piston where the heat is greatest. I'm massively over simplifying things but that's the idea. It's all here for reading http://www.hartech.org/docs/buyers%2...20part%205.pdf There's a lot of info but 3.6 owners should seriously read it.
And for the record I had 51000 miles on the engine and was religious about oil changes, every 5k miles, and always warmed the oil (not water temp) fully before driving hard.
And for the record I had 51000 miles on the engine and was religious about oil changes, every 5k miles, and always warmed the oil (not water temp) fully before driving hard.
I'm going to check the rad fluid and possibly change it, and do the rad cleaning very soon.
04-26-2017, 02:06 AM
#33
3rd Gear
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blue smoke Cayenne
Your description of the issue does sound more like valve stem seals (oil leaking past them after an over night sit). Sounds like a good question to ask Baz Hart with respect to how common the issue is. Two other tests that can indicate valve stem sealing issues are (1) to see if there is a puff of smoke after the car has been at idle for a couple of minutes and then you pull away (2) Let the car roll down a steepish hill in low gear (no throttle hence with the engine doing the braking & high vacuum) and then accelerate away at the bottom and see if there is a puff of smoke.
Also when I slow the car down a hill in low gear (no throttle hence with the engine doing the braking & high vacuum) and then accelerate away at the bottom and there is a puff of smoke.
I have changed the AOS last weekend and new spark plugs but not much change. the first two plugs were black with carbon n oil build up. Oil consumption is high.. 100K on the clock i'm starting to think its some engine seals?
I only have her 3 months too, bought from a dealership...purchased an after sales warranty with first warranty group.
Any advice would be appreciated
04-27-2017, 01:59 AM
#35
3rd Gear
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04-27-2017, 12:16 PM
#36
I don't know how labour intensive it is as I never worked on one. But essentially they use a small camera to access the cylinder to take a look at the walls. on most vehicles, it can be done by removing the spark plug and going through that way.
you can't fix scored cylinders without opening up the engine.
You will get better answers in the Cayenne forum!
you can't fix scored cylinders without opening up the engine.
You will get better answers in the Cayenne forum!
