Valvetrain Inspection
#17
Three Wheelin'
Another maker of good tripe square bits is Apex tool. I use their toxr plus bits on production lines where some stations torque several hundred fasteners a week with the same bit. Usually the bits are "misplaced" before they wear out. More than likely this is the brand Porsche used to assemble our cars.
These are sizes availabe.
http://www.louzampini.com/PDF%20File...ipleSquare.pdf
Although they do not have triple squares listed on their web site, Fastenal carries them. www.fastenal.com
You might have to order them through the local retail branches.
These are sizes availabe.
http://www.louzampini.com/PDF%20File...ipleSquare.pdf
Although they do not have triple squares listed on their web site, Fastenal carries them. www.fastenal.com
You might have to order them through the local retail branches.
#22
RL Community Team
Rennlist Member
Rennlist Member
I will have a DIY ready for a final proof-read ready asap!
For clarity, the valve cover bolts are 6-pointed hexagon socket-head bolts. Commonly referred to in the USA as socket head, but we call them allen head. You can buy allen tools in the form of a key, or a tool for your socket wrench (aka ratchet). I think it's vital to have a set of allen keys and allen sockets.
Cheesehead bolts are also common on Porsches and you will need some for this job. A cheesehead is a 12-pointed bit. You want the "triple-square" ones, not the double-hexagon ones.
For clarity, the valve cover bolts are 6-pointed hexagon socket-head bolts. Commonly referred to in the USA as socket head, but we call them allen head. You can buy allen tools in the form of a key, or a tool for your socket wrench (aka ratchet). I think it's vital to have a set of allen keys and allen sockets.
Cheesehead bolts are also common on Porsches and you will need some for this job. A cheesehead is a 12-pointed bit. You want the "triple-square" ones, not the double-hexagon ones.
#23
Rennlist Member
I have this document outlining the procedure on file from a few years back:
http://www.studiodual.com/pdf/968_camshafts.pdf
http://www.studiodual.com/pdf/968_camshafts.pdf
Last edited by John Etnier; 01-26-2008 at 10:29 AM.
#24
While you are waiting for the procedure Shamus, You may as well start buying some of the tools if you are doing this yourself correctly.
1.) 5 mm allen key or socket
2.) 3mm allen key or socket
3.) Camshaft holders - Dealer Item - do not use the cam bearing caps instead
4.) 12 point allens are measured the same as 6 point 8,10,12,14 are most 12 points on 944/968
5.) 2 Dial gauges - you can use a coat hanger for the extension for setting the intake cam lift. You can always remove the belt from the camshaft and attempt to put it back together without setting lift but then again.....
6.) Compressor or Compressed air for variocam (if setting lift). You do not need the factory tool attachment. Just use an air gun with 1/4" rubber hose on the tip
These are just some things that come to mind as far as tools one may or may not have lying around their garage anyone else want to add something out of the ordinary that they ran into?
1.) 5 mm allen key or socket
2.) 3mm allen key or socket
3.) Camshaft holders - Dealer Item - do not use the cam bearing caps instead
4.) 12 point allens are measured the same as 6 point 8,10,12,14 are most 12 points on 944/968
5.) 2 Dial gauges - you can use a coat hanger for the extension for setting the intake cam lift. You can always remove the belt from the camshaft and attempt to put it back together without setting lift but then again.....
6.) Compressor or Compressed air for variocam (if setting lift). You do not need the factory tool attachment. Just use an air gun with 1/4" rubber hose on the tip
These are just some things that come to mind as far as tools one may or may not have lying around their garage anyone else want to add something out of the ordinary that they ran into?
#25
Autozone, Pep Boys, etc carry 12 points, may or may not be in a socket. Also, a note about the cheeseheads (12 points) clean the oil out of the head before trying to loosen them. The gunk in there will cause what ever tool u use to not seat and will...I repeat will strip the head. The you are stuck trying to remove a bearing cap bolt near some pretty soft aluminum.
#26
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#28
Racer
Join Date: Jan 2004
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Great thread guys! I recently purchased a 968 engine with 110K miles, and will be tackling disassembly, refreshening, and reassembly of my valvetrain in the near future. Is there a more economic alternative to the factory cam bridge tool? Does anyone here has this tool, who is willing to rent it out?
#29
Rennlist Member
You only need dial guages if you have lost your timing or are swapping cam.
Raj