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Heavily Corroded Exhaust Manifold bolts on my Boxster 987 2.7 SE 6SP 08 model

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YOUR RESEARCHHeavily Corroded Exhaust Manifold bolts on my Boxster 987 2.7 SE 6SP 08 model

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Install over the life of the car

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Unsuccessful attempts: 1
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Performed · outcome unconfirmed
Additionally, most manufacturers, in many situations, do not expect the headers to be removed and installed over the life of the car.
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Heavily Corroded Exhaust Manifold bolts on my Boxster 987 2.7 SE 6SP 08 model

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Leading evidence: 'Install over the life of the car' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install over the life of the car' (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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1 matching discussions · 2 captured posts examined · 1 partial discussions

Frequently discussed actions (1)

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Install over the life of the car

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
Additionally, most manufacturers, in many situations, do not expect the headers to be removed and installed over the life of the car.
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Heavily Corroded Exhaust Manifold bolts on my Boxster 987 2.7 SE 6SP 08 model

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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.

2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Planet-9: 1 discussions

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Generation: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Hi Folks I have just registered and want to kick things off with my first post on the subject title From what I can gather the current bolts are mild steel and very prone to corrode particularly on the manifold to the extent I am quite sure they will shear when trying to remove them. The hex head is becoming out of shape due to thermal erosion ( occurring over time ) so I need to look at what is available in terms of replacement bolts in such a material that is not prone to such corrosion/erosion I'm not getting into the means to resolve the issue of sheared bolts in this area and retapping the threads on the block threads. On this post I just want to concentrate on what is a more suitable bolt material and it's availability just now In this regard I have read that Inconel 718 maybe a worthy option but probably more adequate is Titanium, and I have read that there is a particular type listed as Ti6AI4V which is stronger than pure Ti but retains the same stiffness . It claims that this material will never ever rust, rot, corrode or do anything other than remain as a stud, which is what I am looking for I also have a query out to my local Porsche Centre in Glasgow Scotland on this but in the meantime wish to put this out there in the forum to see what comes back Closing question: Why would Porsche insert mild steel bolts in such an area surely knowing what will happen?

POST 2Original post

Manifold stud shear is as old as cars themselves. The heating and cooling cycles most certainly contribute to the potential. Additionally, most manufacturers, in many situations, do not expect the headers to be removed and installed over the life of the car. Dissimilar metals are tough, the Fiat calipers were aluminum, the bleeder was steel. If you snapped it that was it, new or rebuilt caliper, there were no "time-serts" (a product designed to make new threads). The other devil in the details is the room or angle access to drill at a perfect 90 degrees to effect a repair. In short, such an easy thing to break can be and usually is a giant pain in the backside.

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