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Updates
(and Corrections)

Corrections & Notes to the Current Edition
     (Red and white cover)

• Page 43: A reader suggested the following addition to the section on removing the valves from the head:
  

  Before pushing the valve stem through the guide to remove it from the head inspect the upper section of the valve above the recesses where the keepers sit to insure there are no burrs on the valve stem otherwise the burr can damage the inner diameter of the valve guide. Whether your valve guides are relatively new or worn this will make slipping things out easier."

    
• Page 190, Figure 10-16.  This figure may not be perfectly clear to those with 911SC and Turbo engines.  This is a photo of a 2.7 distributor installed in the engine.  When installing plug wires on your distributor, be sure that the wire for plug #1 always lines up with the notch on the inside rim of the distributor (shown in Figure 9-13).  The location of the clip that attaches the cap to the distributor has varied over the years, so don't use that as a guide for installation - always use the mark on the rim of the distributor.
• Page 168, 1st paragraph, last sentence: "you would turn the crankshaft until the value on..."  It should say "camshaft".
• Page 134, 2nd paragraph: "Install them in the case so that the nuts are located on the left side of the engine."  It should say "right side of the engine", similar to how they are shown in Photo 3-28 (the photo is correct).
• Page 200, Page 139/140: There seems to be an issue with people using the wrong type of bolt for the air conditioning pulley.  This bolt should be a 12.9 specification bolt.  If it's not, then the bolt will probably snap when you tighten it up to the proper torque.  There's a good thread on this in our forums.
• Page 155: The text is confusing in the 2nd paragraph in the left hand column.  The text says "If you look at this camshaft down its axis," when it should actually read "If you look at the left-hand camshaft down its axis"
• Page 73, Photo 4-11: There is a white dot in the photo without a number.  This points to valve stem seals and assorted extra o-rings.  The valve stem seals are typically installed by your machine shop when you have your heads rebulit.
• Page 84, Photo 4-14: The photo shows a replacement steel stud from Porsche.  The steel studs installed in the cases often do not have black paint on them, and look just like the Dilavar studs.  Use a magnet to determine which ones you have.
• Page 105, first line of text on the page should read "moving the rotor closer to the firing point on the distributor"
• Page 215, Bearing Sizes - Rod Bearings (D2).  The numbers listed for the 2.0/2.2 and the 2.4/2.7/3.0 are incorrect.  They should read:
   

  	2.0/2.2 911 (1965-71)	2.4/2.7/3.0 Turbo 911 (1972-77) 911 Turbo (1976-77) Euro Carrera (1976-77)
  Rod Bearings (D2)
  Standard	51.971-51.990	51.971-51.990
  -0.25mm	51.721-51.740	51.721-51.740
  -0.50mm	51.471-51.490	51.471-51.490
  -0.75mm	51.221-51.240	51.221-51.240

• Rocker Arm Bushings, (901.105.043.98).  Porsche doesn't appear to be carrying this part anymore.  I'm currently looking for an aftermarket bushing to be used in place of these.
• Page 215, item number 21, should be listed as 911 (1978-89)
• Page 185 - In the caption for Figure 10-6, the swivel foot is shown on the left, not the right.
• Page 120 - Plastigage should be used at the sides of the rods - not in the middle. The rods stretch when under load, and you want to measure the clearances at the side.
• Page 160 - Figure 6-11 shows a mirror image of what it should be (chains should point in opposite directions)
• Page 169 - Figure 7-14 is slightly misleading.  The 0.1mm indicator in the left of the figure represents the valve clearances while setting the cam timing.
• Page 210 - The very first column at the top of the page says "2.2" when it should say "2.0"

Corrections in the First Printing
     (all Red Cover with yellow lettering in the title)

• Page 38, there are 11 total through-bolts that need to be removed, not 10 as stated in the last sentence of the first paragraph.
• Page 200, the rod bolt torque value lists the Porsche spec for the later-style rod bolts (911 1984-89 and Turbo 1978-89).  There is a note at the bottom of the page regarding the change in the spec.  Some people prefer to use the earlier spec of 50 Nm (36.2 ft-lbs), documented at the bottom of the page.
• Page 201, 1973 1/2 911T, engine types 911/91 and 911/96 are listed as having a bore of 90mm instead of the actual value of 84mm.
• Page 139, the final torque value for the 1978-89 911 flywheel bolts is incorrectly listed.  The actual value should be 90 Nm (66.3 ft-lbs) as is listed in Appendix A.
• Page 208: the notation under the cylinder diagram says "cylinder CT."  This is a layout marker and has nothing to do with the actual diagram
• Page 208, on the same diagram:
  -  A = tolerance group for cylinder height
  -  B = tolerance group for cylinder diameter
  -  C = Manufacturer's Identification
• Page 154 - The cam tower nuts should be torqued to 75% of the value listed in Appendix A.
• Page 159 - The value 54.8mm should be subtracted, not added to the value.  Also, the shim thickness is 0.50mm, not 0.25mm
• Page 199 - It should be 915 transmission, not 914 transmission.
• Page 77 - The four vertical lines are indicated by the green arrow, not the blue arrow.
• Page 216 - The intake and exhaust valves are numbered incorrectly in the photo (1 = Intake, 2 = Exhaust)
• Page 204 - The 911SC Rod Bearing Journals should be 53.020-53.059 for the bore, and 52.971-52.990 for the shaft
• Page 204 - The 3.2/3.3 Rod Bearings Bore should be 55.020-55.059
• Page 77 - The Turbo pump has a larger pressure side as well as a larger scavenge side.
• Page 16 - "...when the cylinder heads have broken..." should read "...when the cylinder head studs have broken..."
• Page 112 - 44 Weber Carb should read 40 Weber Carb
• Page 112 - Typo "modifications"
• Page 183 - Section Heading should be "REAR ENGINE MOUNT BAR" or simply "ENGINE MOUNT BAR"
• Page 197 - "...you let the clutch out..." should be "...you let the clutch pedal out..."
• Page 119/120 - "Plastigage" spelled incorrectly
• Page 82 - Glass plate method is described in Chapter 5, Section 9
• Page 180 - Valve Covers, 13mm hardware should be 8mm hardware
• Page 153 - Figure 5-9 shows an area that is larger than needs to be covered with the sealant.   The flat surfaces of the heads shown in the figure directly above it are what need to be sealed.  In reality, the horizontal bars on the cam towers (on the ends and in-between the cylinders) do not need to be coated.  If you follow the diagram, you will use more sealant than you need to - possibly creating a messy situation.
• Page 73 - Valve cover gaskets should be listed as 25/26 in Figure 4-1.