03-31-08, 07:51 AM
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| Cadillac Owners Connoisseur Cadillac(s): Member of Air Fuel Tuning (Cadillac Division)  | | Join Date: Apr 2007 Location: Inside The Northstar PCM Age: 41 | |
| Re: Root Cause of Head gasket Failure and a Fix?
Quote:
Originally Posted by AJxtcman  1994 to 1999 Head bolt Part number ------- 1647217
Thread size ------------------------------- M11 x 1.5 x 30mm
Bolt Length (under washer) --------------- 139.9 mm
Bolt Thread length ------------------------ 44.5 mm
Hole depth ------------------------------- 75 mm
Cylinder head boss height ----------------- 76.0 mm
Counter bore depth ----------------------- 35 mm
2000 to 2003 Head Bolt Part Number ------ 12557775
Thread size ------------------------------ M11 x 1.5 x 30 mm
Bolt Length (under washer) -------------- 157.2 mm
Bolt Thread length ----------------------- 45.3 mm
Outboard hole depth --------------------- 96.5 mm
Counter bore depth ---------------------- 51.5 mm
Inboard hole depth ---------------------- 80 mm
Counter bore depth ---------------------- 35 mm
Cylinder head boss height - outboard ----- 76.0 mm
Cylinder head boss height - inboard ------- 92.5 mm
2004 to 2008 Head bolt Part Number -----11589058
Thread size ---------------------------- M11 x 2.0 x 30 mm
Bolt Length (under washer) ------------- 157.2 mm
Bolt Thread length ---------------------- 64.8 mm
Outboard hole depth -------------------- 89.5 mm
Counter bore depth --------------------- 45.5 mm
Inboard hole depth ---------------------- 73 mm
Counter bore depth --------------------- 29 mm
Cylinder head boss height - outboard ---- 76.0 mm
Cylinder head boss height - inboard ------ 92.5 mm
If you buy a set of 2004+ bolts and cut 17.3 mm off the bottom you will have 47.5 mm of threads left on the bolt. The 94 to 99 have only 44.5 mm on them. So the 2004 bolts will have 3 mm more. | Will someone check my math on this please. Thank A.J. |