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Top off engine coolant

Is it necessary to use a 50/50 mix of coolant and distilled water to top off engine coolant?  Also, what type of coolant is appropriate?

Mid RPM Miss/Stumbling

I recently bought a 2014 CPO Cayman S with ~60k miles.   During acceleration I notice a momentarty stumbling in the 2k to 3k+ range.   Could this be a ignition issue (coils, sparkplugs).   I do not know if the spark plugs/coils have been changed.   There are no fault codes.    Any insight would be appreciated.  

981 Metal-to-Metal tapping

To provide a setting, I only detected this as I was rolling though a traffic light intersection between two closely set buildings – a distinct tapping.

At 1800RPM>, I get a metal/metal tapping when in neutral w/the clutch out. As I press the clutch in, it proceeds to go away.

The tapping isn’t totally in rhythm w/the RPM of the engine (so far). Does not get louder, just faster (It does sound wildly more expensive as you get beyond 2K-RPM>)

Drives great. No CEL. No loss of performance. Gas mileage about the same.

Engine Identification

I have a 2006 Cayman S with 21K miles on the clock. With reference to the IMS bearing,I understand that some early production cars were produced with earlier build M97 engines that were fitted with the small OD IMS bearing rather than the large OD bearing which is much less prone to failure.

Question: Can earlier build M97 engines with the small bearing be identified by engine serial number or vehicle VIN number ??

If so, where is the serial number located?

Thanks,

Dennis

Crazy question looking to find out if you can put the 2.7 in the Cayman S

I have a nuts question I know. I have a Cayman S with a blown motor. I have to sleeve a cylinder pretty scored. SO the quotes I have are for around 12k. My question is can I put a 2.7 engine in the S cayman. I know it has been done the other way around with a remapping of the computer. I love my car and can't afford a new engine and a used one is near impossible to find. I can afford the 2.7 and I do not want to sell my car. I figure at a later time I can upgrade when the finances are better, I had the typical Cayman tick but it wasn't the lifters this time.

Reason for engine hesitation under acceleration

The engine hesitates very briefly under acceleration and this is most noticeable at around 2000 RPM but can occur at higher engine speeds. The strange thing is that the problem disappears when I fill the fuel tank with gas and reappears when about a third of the gas in the tank has been burned. The CEL does not come on and the car drives normally otherwise - the fuel consumption is also normal.

Throttle adaptation/calibration

1 - Is throttle adaptation/calibration something that applies to my car specifically?
2 - If yes, what is the correct way to do it? (conflicting info on this as well)

Experience with PADM Alert 2014 Cayman S

At 19,500 miles, during a routine commute home at the end of the day, a PADM alert popped up.  The alert is still there, and I know now that the left dynamic mount is defective.  

Likely an electrical fault, as the mount itself is pristine ... no oil or signs of damage.  In search of various forums, I see that PADM faults and failure of the dynamic mounts are not uncommon.  Especially for the Boxster and Cayman model.

My Cayman S is a daily driver, and has been tracked about 5 times. My Cayman is meticulously maintained.

My questions to the community:

How high should the boil get to be safe

I was tracking this last weekend when it was quite hot. My oil went to 250F. I am running standard Mobile 1. This temperature seems to be too hoigh for the oil. 

Is this temperature normal for GT-4s?

Should I be running a different oil?

PCA Indy shops near Irvine CA

Hello everyone,

Does anyone know of a good Indy shop near Irvine CA? Just moved to the area and coming up on a service soon. Many thinks for the help. 

Chadd B. 

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