Hi Folk....

I just finished the AOS replacement and let me tell you that it was easier then i tough at first..

Everybody scared for the (intake 6th bolt) but once you took out the throttle body and i also took out the alternator it was really simple and easy.During the process i had to do the job by 2 times and the second time it took me just 30 minutes to took out the alternator and the intake....believe me it is really easy to do.The trick is to use your two hands .....one of each side of the intake... that way you can place the ratchet easily

I have been surprised when i realized that there was missing some vacuum hoses and there was supposed to be a 4 way splitter attached the vacuum tank but someone before me replaced it by a 3 way splitter and did not connected the vacuum of the change over valve....just to understand how the vacuum circuit works i passed more then 2 hours in this site but finally received all the info from OZ951...thanks to you guy...that was great.

While i was there i had the alternator rebuilted ($150.00) and the starter ($60.00).I also replaced almost all the vacuum hoses ($15.00) and changed some coolant hoses(100.00) all parts from the Porsche dealer.
I also cleaned all the engine replaced the coolant and changed the engine oil.

If you ever decide to do the job just an advice...take care when you have to split hoses...they are old and believe they will brake.Of corse the vacuum hoses are cheap to replace but the same will happen if you ever decide to replace some coolant hoses....they will also brake...it is hard to believe how supple rubber from new hoses is and the old one are stiff...

Now the engine run like a champ with no more oil leak.
The old AOS was cracked and leak oil that is why i replaced it.

All and all it took me almost 10 to 12 hours (including cleaning) to perform the replacement but now that i know how it works i could easily do it in less then 5 hours.

Robert
911 2000

 

Just wanted to point out that if you found some coolant hoses worth replacing then they all should be replaced as they all tend to age and deteriorate at a similar rate.

I have not come across this recently but when I was learning what little I know about cars a tech told me it was not unknown for someone to replace one maybe both radiator hoses but ignore the heat core hose. And a heater core hose failing is nearly as bad as a radiator hose failing.

So he said that if I found one bad hose, or questionable hose I should replace all hoses, even those little bitty ones at the heater core.

These cars not only have short hoses at the engine which connect the water pump/engine to the coolant pipes that run under the car to the front but also short hoses at the front of the car that connect the coolant pipes to the radiators and maybe a hose or two that connects the coolant tank to the engine.

Sincerely,

Macster.

 

Nice to hear of your AOS replacement, thanks for the tips.

 

You've given me hope yet that I can change the AOS relatively painlessly without dropping the engine even just a little bit.

 

Any one with a tip car do the AOS replacement? I am going to tackle mine this week. I have been told that it cannot be done from the top and I am skeptical about this claim... thoughts?

 

I've done this job, and posted a thread about it a while back. Don't fret about the engine lowering, even one bit. It's so easy, it's laughable. Lowering the engine a bit will be one of the easier chores and makes the job SO much easier, because you'll have more room to work and see what you're doing.

 

Yep, it's a pretty trivial task to unscrew the engine mounts a few turns to gain an extra inch or two. I like to stop once the threads at the bottom of the nut disappear. And also safely support the engine from underneath just in case.