Reverse Polarity - Electrical Damage 997 -4S
10-04-2022 | 11:40 AM
#31
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Joined: Aug 2022
Posts: 74
Likes: 14
From: Collingwood,Ontario, Canada
Very sorry to hear about your engine. I re-read your initial post and see you rebuilt the engine yourself.
Considering you inadvertently hooked up your battery incorrectly, isn't there a chance you missed a step during your rebuild and reason for the coolant issue?
I'm not trying to throw you under the bus or disrespecting you, but rebuilding a 997 engine takes a good amount of expertise and requires a good amount of mechanical experience.
From my many visits to my Porsche Specialist Indy and watching him rebuild Porsche engines over past 38 years, there's a lot of expertise required and years of experience needed in order to rebuild any Porsche engine.
I'd imagine a seal is not seated properly or similar causing the coolant leak/mix.
Sorry you have to deal with it but can't be too surprising considering you have never rebuilt a 997 engine and I believe it takes a lot more experience than just taking a class.
Considering you inadvertently hooked up your battery incorrectly, isn't there a chance you missed a step during your rebuild and reason for the coolant issue?
I'm not trying to throw you under the bus or disrespecting you, but rebuilding a 997 engine takes a good amount of expertise and requires a good amount of mechanical experience.
From my many visits to my Porsche Specialist Indy and watching him rebuild Porsche engines over past 38 years, there's a lot of expertise required and years of experience needed in order to rebuild any Porsche engine.
I'd imagine a seal is not seated properly or similar causing the coolant leak/mix.
Sorry you have to deal with it but can't be too surprising considering you have never rebuilt a 997 engine and I believe it takes a lot more experience than just taking a class.
10-04-2022 | 02:42 PM
#32
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Joined: Oct 2007
Posts: 17,709
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From: seattle, washington
actually have rebuilt a number of engines although many years ago….certainly Porsche engines add another dimension but I don’t question my rebuild as I doubled and triple checked everything unlike the momentary lapse of judgement due to pure excitement of finally getting to the stage of turn the key. I had every part checked and pressure tested. It looks like the head that I sourced and had rebuilt was done incorrectly by a local rebuild shop but won’t be able to confirm until more testing is completed. If I have to drop the engine again and re work the engine I will …unfortunate but things not always come out perfectly even when you do all the right steps.
Your experience with the rebuild having issues is the reason I would never attempt to do any sizable repairs on my Porsche's over the years.
Only repair I've done was an oil temp switch on my 964 years ago.
I can do house related electrical/plumbing and other tasks related construction but I have 0 confidence in any sort of indepth car related repairs.
Really sorry for the issues and hope it gets resolved easily
10-17-2022 | 03:32 PM
#34
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Joined: Aug 2022
Posts: 74
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From: Collingwood,Ontario, Canada
a bunch of fuses blown and replaced. Car is running smooth now after about 500 miles. Power/throttle is not what it should be especially after in form a 3.8 to 3.9L. I have tons of engine fault codes which I am trying to figure out. I know that at least two of my O2 sensors need to be replaced and I understand that these faults can cause potentially a number of other faults in the system. The engine blew up on the bank 2 side and coolant would have gotten into the exhaust and into the catalytic convertor....I guess i will replace the O2 sensors there first. Still thinking maybe i did do damage to some other electrics, like the EUC as the Power/throttle needs to be adjusted. My engine light is on but the car does run beautifully otherwise.