13 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 C4s Battery Generator Fault - Alternator advice
Leading reported evidence
Install brand new bosch
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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1
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Performed · outcome unconfirmed
My indie fitted a brand new Bosch which cost him about that, not sure where he got it from.
Leading evidence: 'Install brand new bosch' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check voltage output' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Check your voltage output with engine running, should be 14v ish.
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Suggestion
If alt failed then remove it and take it to a Starter / Alternator refurb repair shop, they will sort it for a fraction of the prices you have quoted.
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Suggestion
Recommend to change the aux belt while you are at it.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
13 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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Generation: 20261026T100758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi guys,
Warning light came on last night.. cars 16 years old and on 56k miles... fair enough :lol:
Any advice? An OEM Porsche one is about £1500!! :floor:
Indie recommended a Bosch one for about £285
https://www.carparts4less.co.uk/alternator
Is it easy ish to do by yourself?
Any advice welcome
Cheers,
BK :thumb:
Check your voltage output with engine running, should be 14v ish. If alt failed then remove it and take it to a Starter / Alternator refurb repair shop, they will sort it for a fraction of the prices you have quoted.
DEFINITELY don't go to OPC!
Take it to a car electrical place and it's most likely to be the voltage regulator that's gone.
About £50 (or £80 if they service the alternator) to fix and the "Pelican 101 projects for your 911" site shows you to get alternator out (quite simple).
Watch out for the small print - those Bosch ones are recon models not brand new!
My indie fitted a brand new Bosch which cost him about that, not sure where he got it from. Fitting was about an hours labour, and he put in a new belt too (£36).
It will be just the voltage regulator but I changed the whole unit as it was 15 years old anyway and it wasn't loads of money in the grand scheme of things.
Easy enough to do yourself but there are a few pitfalls to avoid. First is, it's fiddly to get back in, so can be a real pain - don't lose your temper :lol:
Secondly, there's a small coolant joiner that bolts up just to the right of it. It's very brittle when old. I snapped mine easily when putting stuff back together. Was a kick in the balls. Only 3 quid for a new one. I'd replace it as matter of course. If you don't want to, to avoid an accident just take the bolt out whilst you're working on it.
Last one is there's a brass (?) Bush that the pinch bolt tightens into and pulls it in tight. It needs a crack sometimes to allow the old alternator to come out. Problem is, people have managed to break the lugs on their alternators and that leaves you with a surcharge you can't reclaim.
Good luck.
My alternator failed three weeks ago. Took it apart and found that the bushes Were worn away to virtually nothing. 100000K mile car. I replaced it with the new regulator from frazerpart for about 50 quid. Moderately easy DIY
Guy
As above - be patient. Buy the little plastic pipe in advance as it will break.
If reinstalling the original alternator, the bushing on the leg at the opposite end to the Pully (the forward one) needs to be pressed back into the leg. As mentioned above it clamps onto the casting in the engine when you tighter the bolt. If you push it back into the leg casting, the alternator will drop back into place. If you don't, you be lucky to get it back in. Use a spare nut and bolt and a socket to 'push" it back in. Don't try to hammer it as the casing cracks easily. Ask me how I know .....
Recommend to change the aux belt while you are at it.
Give your Airbox, maf and butterfly a clean at the same time as they are exposed.
