Bypass Coolant to AOS/OVS Mod? Imre's Idea.
11-25-2013, 11:27 PM
#17
Rennlist Member
I hate it when the 'You think you know better than Porsche Engineers?' card is played... Porsche Engineers design to many objectives, including a significant amount of regulatory requirements (noise, safety, emissions, etc). Not necessarily the 'best' way to do something, rather the best solution that meets all requirements including cost sensitivity.
Engines would likely still be vented to the atmosphere if performance/simplicity/longevity were the primary goals. Heck, Porsche probably would have never gone water cooled in the first place if it wasn't for increasingly strict emission regs...
Engines would likely still be vented to the atmosphere if performance/simplicity/longevity were the primary goals. Heck, Porsche probably would have never gone water cooled in the first place if it wasn't for increasingly strict emission regs...
11-26-2013, 05:17 AM
#19
Drifting
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There should be separate forums for 'Trackers' and 'street drivers'. Obviously two different breeds of Porsche drivers who should not be mixing.
11-26-2013, 08:19 AM
#20
Captain Obvious
Super User
Super User
Being a DIY doesn't mean you understand how and why things are done by the factory. You work on enough cars, not all Porsches, and you'll start to see certain patterns and then MAYBE you'll start to also understand how things work. Yes, as I wrote before, I beleive that coolant lime is there for extreme cold conditions.
05-15-2017, 08:04 AM
#21
I'm in the process of replacing the AOS in my '04 Cab, and indeed the coolant hoses where there, but not connected to anything! The car was originally delivered to Florida first owner, and according to the carfax had not been replaced.....so was it delivered that way?
05-15-2017, 12:21 PM
#23
Race Director
The odds of everyone with a 996 bothering to Carfax an AOS - especially this far along in the game - are long or nonexistent.
Plus, Carfax is a scam. I have the thread to prove it.
Plus, Carfax is a scam. I have the thread to prove it.
05-15-2017, 02:10 PM
#24
Rennlist Member
I always cringe when KK's old threads are bumped. Should the guy who bought his car also check for expanding foam in the AOS?
05-15-2017, 04:05 PM
#25
This one seemed pretty complete, first owner mostly warranty and maintenance stuff at Porsche of Orlando, which included headlight switch and front crankcase oil seal replaced. Second owner used The Collection of Coral Gables, and listed such service items as brake fluid, tires and maintenance inspections. Granted, the AOS could have gone out and the owner decided to have it service somewhere else - which probably is the case. The bottom line is that they didn't hook these coolant lines back up, but I wonder where they are suppose to attach to , ie, what was done to plug them up at that end?
05-15-2017, 09:58 PM
#26
Instructor
I hate it when the 'You think you know better than Porsche Engineers?' card is played... Porsche Engineers design to many objectives, including a significant amount of regulatory requirements (noise, safety, emissions, etc). Not necessarily the 'best' way to do something, rather the best solution that meets all requirements including cost sensitivity.
Engines would likely still be vented to the atmosphere if performance/simplicity/longevity were the primary goals. Heck, Porsche probably would have never gone water cooled in the first place if it wasn't for increasingly strict emission regs...
Engines would likely still be vented to the atmosphere if performance/simplicity/longevity were the primary goals. Heck, Porsche probably would have never gone water cooled in the first place if it wasn't for increasingly strict emission regs...
02-12-2018, 08:09 PM
#27
Macster, I disagree. The engine will get plenty hot for the AOS to not cause condensation issue. I have no idea where you get these theories but coming up with them has to be time consuming as they are very convincing to those that don't have much experience with engines. I'm fairly certain that line is for extreme colds and short distance drives. I think its worth a shot bypassing it.
I ran my 996 for a while with the AOS lines cut and plugged. Did it bc of a leak in the lines or AOS. Here in the Kansai area of Japan the weather is @ lot lije mid-SOuth Carolina. Snow is generally only a dusting. Temps get low enough sonetimes to put ice skim on the dog’s water. But I replaced the libes and AOS. WHY? Because Porsche engineers seem to think it is a good idea. If I lived in Okinawa maybe I would have left it off, but here? Not chancing it.
02-12-2018, 08:11 PM
#28
You disagree with Macster on this point and in doing so disagree with the Porsche Engine designers. So you have more experience with engines than the Porsche Engineers? Then you go on to say that Macster is convincing to people or THOSE that don't have much experience with engines. YET you are only half convinced that you are correct with your reckoning when you say things like :- I am FAIRLY certain and I THINK it's worth a shot bypassing it. You my friend are all bologna. I don't THINK so I know so from your posting. Not that Macster would have told you so, as he is more a gentleman than I am. If you did this MOD, would you return it to the original as you pass on the car to the next owner. I know not. And some poor unaware buyer buys what could be an exploding time bomb especially if it moves from one part of the country to another with a different climate. If I ever had to buy another 996, I would not buy it from an owner who frequents this or any other Porsche Board. You scare me half ****less with your mods.
02-12-2018, 08:24 PM
#29
Rennlist Member
Another zombie thread has arisen!
01-13-2024, 08:07 PM
#30
4th Gear
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sorry to bring up an old thread! But I've been having a issue with a coolant leak, which from pics so far shared on FB people seem to think its AOS coolant supply link.
I probably need to have my engine removed to have that replaced plus a bunch of other hoses given the car is a UK 2002 ( C4S manual) but need a temp fix.
i have just very disconnected the supply No1 line to AOS and as stated the upper connector broke off.
I've ordered a 5mm brass connector to pop in here.
now as a temp solution to stop the leak can I cap this connector off ( as one side is threaded) and will blocking the supply and leaving the return feed as is , cause any problems?
i dont want to break anything else and start messing around with the return line too. The car would potentially be driven in cold weather, slow speed short trips till fixed properly.
I probably need to have my engine removed to have that replaced plus a bunch of other hoses given the car is a UK 2002 ( C4S manual) but need a temp fix.
i have just very disconnected the supply No1 line to AOS and as stated the upper connector broke off.
I've ordered a 5mm brass connector to pop in here.
now as a temp solution to stop the leak can I cap this connector off ( as one side is threaded) and will blocking the supply and leaving the return feed as is , cause any problems?
i dont want to break anything else and start messing around with the return line too. The car would potentially be driven in cold weather, slow speed short trips till fixed properly.