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I was waiting to change my AOS when I did the clutch service.. Bad idea. The 2 Pistons to the left haven't been cleaned yet.. So much caked on oil. My intake was also completely douched..
The head was off for intermix issues, not a cleaning..ha!
Suggestions to clean? I used carb cleaner in the first one. But went through $10 worth in about 5 mins. Would a brass brush be ok?
Thinking I may pull the passenger head off too... What a mess.
Brake clean and 3m has white and red " scotch brite" pads. They don't mar surfaces. I use them all the time on engines and tranmissions, where steel wool is too rough.
Part numbers 07447 - Red and 7445 - white.
If you plan to repair the head, usually it will be polished so you don't really need to clean the mating surface. For the cylinder side, I would be very careful not to use anything abrasive. I have good experience with using this. Just apply it and let it sit 5 minute then most of the black gasket can be wiped off with a clean towel.
The beauty of the AOS design means that even if you install a new one, you can still get boned. It's Russian roulette with a new pistol for every turn.
Permatex Gasket Remover. Tilt the block so that it drains out, spray it and let it sit for 5-10min, then wipe away the dissolved carbon. Came up with this by accident when repairing my engine. The AOS failed like yours and the ports were cracked like a diesel intake. Bought the gasket remover to remove the old head gasket material and when some of it go onto the piston tops, it started bubbling and melting off the carbon. So I put some more on it and let is stand for a few minutes. I was amazed how well it worked and you will too.
And after all this expense and effort the replacement AOS may not last long. Elsewhere JFP mentions short-lived AOS problems - even the OEM item fails quickly sometimes.
The AOS system seems unreliable and needlessly complicated. And when it fails it is more than an inconvenience + the price of the part.
There is hope for a better, simpler system.It was described by "Stelan" in other Posts. His system uses generic,smaller parts with fewer vacuum hoses. He describes it working well.
Others have just increased the oil capacity.SAdly there are no specific DIY guides or parts lists to help us retrofit these upgraded systems: http://986forum.com/forums/performan...-solution.html
see post 8 and 13 in this thread for specifics: http://986forum.com/forums/general-d...s-failing.html
03-27-2016, 06:10 PM
Change Your AOS......or this!!
