FS: Cayman parts that may fit/upgrade 986

[JFP in PA]

Originally Posted by m3j0n

never heard of such a thing. So if you damage a valve cover on these cars, you have to replace the head?... I would be very amazed if that was the case.




Does an IMS wear out?




Looked up pricing and thought my asking price was fair. This is from a cayman S, not a boxster... is there a difference?> Boxster and cayman S has a different part number for the IMS./ Cayman S IMS retails for over $2k... Hows $450?




Looked up pricing and thought my asking price was fair. This is from a cayman S, not a boxster... is there a difference?> Boxster and cayman S has a different part number for the IMS./ Cayman S IMS retails for over $2k... Hows $450?

The cam cover and cylinder head are machined as a single unit and are a matched set. You cannot mix cam covers and cylinder heads, it simply will not work.

Yes IMS wear out, do a search about engine failures due to the IMS coming apart.

The IMS shaft, and the rest of the engine, are exactly the same in both a Boxster and a Cayman. And $450 is still way too much for a used shaft.

[m3j0n]

Originally Posted by JFP in PA

The cam cover and cylinder head are machined as a single unit and are a matched set. You cannot mix cam covers and cylinder heads, it simply will not work.

Yes IMS wear out, do a search about engine failures due to the IMS coming apart.

The IMS shaft, and the rest of the engine, are exactly the same in both a Boxster and a Cayman. And $450 is still way too much for a used shaft.

cam cover/cap is not the same as a valve cover. You are referring to a cam cap, which is machined in teh head. The valve covers are not.

OK, $250 for the IMS?

[JFP in PA]

Originally Posted by m3j0n

cam cover/cap is not the same as a valve cover. You are referring to a cam cap, which is machined in teh head. The valve covers are not.

OK, $250 for the IMS?

Once and for all, these cars do not have valve covers, they have cam covers, in which are bored the cam retaining saddles, which match the ones in cylinder heads, because they are bored as a unit. The cam covers form the upper half of the cam bearing saddles, the cylinder heads the lower half:



Each cylinder head has its own unique matching cam cover, which cannot be interchanged with another, as the cams will not fit properly or turn correctly, which is why they are only sold as a set. Don't presume to lecture on something you obviously don't understand.

[m3j0n]

Originally Posted by JFP in PA

Once and for all, these cars do not have valve covers, they have cam covers, in which are bored the cam retaining saddles, which match the ones in cylinder heads, because they are bored as a unit. The cam covers form the upper half of the cam bearing saddles, the cylinder heads the lower half:



Each cylinder head has its own unique matching cam cover, which cannot be interchanged with another, as the cams will not fit properly or turn correctly, which is why they are only sold as a set. Don't presume to lecture on something you obviously don't understand.

thank you for the info. That is a pretty stupid design...I do have the complete head with valve cover and cams then...

btw, what car is that head from? The cayman engine I have here only has 4 in the cover vs the 6 that are shown in your photo. Thanks.

[JFP in PA]

Originally Posted by m3j0n

thank you for the info. That is a pretty stupid design...I do have the complete head with valve cover and cams then...

btw, what car is that head from? The cayman engine I have here only has 4 in the cover vs the 6 that are shown in your photo. Thanks.

Actually, it is an excellent and well proven design.

The photos are from a five chain version of the engine, yours is probably the three chain version, which is just a matter of model year.