18 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHengine
Leading reported evidence
Replace are okay
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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Suggestion
Define "serviced on a regular basis." Owners manual and factory said 15,000 mile oil changes are okay.
Leading evidence: 'Replace are okay' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace are okay' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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.
Suggestion
If you can't afford to replace the engine, don't buy the car.
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.
18 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
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Generation: 20261027T061840Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I am looking at buying a used 1999 Porsche 911 with a H6 engine showing 65,000 miles. Are these engines trouble free, if they have had been serviced on a regular basis?
Regards,
Guy Nesbitt
Do a search. A small percentage of these will grenade due to failed IMS bearings. Earlier models had issues with cracked heads. And there's also cylinder scoring though it doesn't happen as frequently on a 3.4.
Define "serviced on a regular basis." Owners manual and factory said 15,000 mile oil changes are okay. Experience now tells us 3-5K or once a year is far better. And you need to do some reading on the forum.
Hey there, Guy. If you want to get into specifics after you've done a little bit of research, some of us will be game to chat with you about you potential 911 ownership. Based on this casual inquiry, though, I'd say no, they're not trouble-free. Keeping a '99 911 engine (M96 engine) healthy will require a bit of diligence on your part should you decide to purchase.
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These engines will give you trouble. I’ve caught mine sneaking out in the middle of the night to hook up with the Subaru engine down the street. Also my engine is a teenager, so caught it smoking a few times. These kids cause trouble, but a PPI and some good parenting will go a long way.
The serious answer is they are Porsche's not Toyota's. There are somewhat reliable for a heavily engineered German sports car that is 18 years old. But the engines have been known to last between 10k-200k+ miles. If you can't afford to replace the engine, don't buy the car.
I am looking at buying a used 1999 Porsche 911 with a H6 engine showing 65,000 miles. Are these engines trouble free, if they have had been serviced on a regular basis?
I cant stop laughing.
Is DJT a Liberal?
Is the Pope Catholic?
Does a Bear _______ in the woods?
Which one doesnt belong?
I also live in the mountains and have seen a black bear come up on my deck and eat my bird feeders. I don’t live in the woods, therefore I can state bears don’t do everything in the woods. Therefore:
is DJT liberal = no
is the pope catholic = yes
does a bear —- in the woods = sometimes
So the yes and no cancel each other, therefore the answer to “is a Porsche engine trouble free?” = sometimes.
