Planet-9

3.4L Engine Swap into a Base Cayman

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3 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

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YOUR RESEARCH3.4L Engine Swap into a Base Cayman

Leading reported evidence

Replace engines

Suggestion or failed attempt

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Unsuccessful attempts: 1
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Suggestion
Since you're changing engines that are in the same generation and type (both EFI and not DFI/EFI), it should be a simple swap of the engine and transmission.
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3.4L Engine Swap into a Base Cayman

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Leading evidence: 'Replace engines' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace engines' (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 · 3 captured posts examined · 1 partial discussions

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Test drive it

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

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

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Suggestion
Not sure if the crankshaft sensor is the only thing wrong with it, and I can't really test drive it to find out more
Original post Read captured discussion
3.4L Engine Swap into a Base Cayman

Frequently discussed actions (2)

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Replace engines

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Since you're changing engines that are in the same generation and type (both EFI and not DFI/EFI), it should be a simple swap of the engine and transmission.
Original post Read captured discussion
3.4L Engine Swap into a Base Cayman

Test drive it

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Not sure if the crankshaft sensor is the only thing wrong with it, and I can't really test drive it to find out more
Original post Read captured discussion
3.4L Engine Swap into a Base Cayman

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

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Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

A little while ago now, I ended up in an accident that had my Cayman written off. Seemingly only minor front end damage, however the cost to repair was about 1.5x the price of the car, hence my insurance writing it off. I've found another Cayman for sale with an engine problem where it cranks, but won't start, and is trowing the codes 'P0337 General Crankshaft Position Sensor A Curcuit Low' and 'P0335 General Crankshaft Position Sensor A Curcuit'. Both codes are repeated twice through an OBD scan. I fly over to take a look at this car in two days to take a closer look. This car is selling for 35% what my Cayman was (This car is a base model with 211,000km/131,000 miles, and has quite a lot of modifications done to it) I'm weighing up the idea of buying back my car from insurance (I don't have a buy back price as of yet) and swapping my engine and transmission into this car with the problems. I rebuilt my transmission about 2,000km/1200 miles ago to make this idea even more appealing. Now for the potential issues with this idea: Not sure if the crankshaft sensor is the only thing wrong with it, and I can't really test drive it to find out more My car is a 3.4L Cayman S , whereas this car is a 2.7L Cayman Base Any input on whether this idea is even possible, how hard it would be, or how hard it would be to repair this broken Cayman 's engine is much appreciated.

POST 2Original post

For anyone more curious about details of the cars: My car is a 2008 Cayman S tiptronic. Almost entirely stock outside of a Hartech Deep sump, 911 Turbo brake ducts, track/street hybrid brake pads. Sitting at 104,000km/64,000 miles, and I rebuilt the transmission at 102,000km/63,000 miles. No sport chrono . The problem car is a 2006 Cayman Base, tiptronic, with sport chrono , has the engine problems mentioned above, alongside an 82mm GT3 throttle body, tune, IPD intake plenum, coilovers, K&N air filter, throttle control unit, New iridiu spark plugs , 20 inch OZ racing wheels (245/35ZR20 front, 295/30ZR20 rear), Sony head unit with apple car play , upgraded speaker system and subwoofers, extra spare set of OEM wheels and tyres, New Air oil separator, and a reconditioned torque converter and trans fluid flush 5000km ago that is irrelevant to me if I swap my trans into this one. IMS bearing has not been addressed, and no service history.

POST 3Original post

Since you're changing engines that are in the same generation and type (both EFI and not DFI/EFI), it should be a simple swap of the engine and transmission. I don't think there's anything else on the car that is specific to base vs S that would affect it and you could always code it to the new engine type. I think if you just had the base Cayman DME tuned for the 3.4, the car would otherwise not know the difference. If your 2008 had PSE or some other option that the base doesn't, you might need to retrofit some wiring or code the car for it. If not, it should just work. Reach out to Softronics for info on tuning it to the bigger engine. Your Porsche dealership might also be able to code it for you as well.

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