Quote:
Originally Posted by NJ300sdl
__________________
Mercedes head gasket info: P/N A6030163220, 1.74 thick (std), $107, P/N 6030163320, 1.97 thick, $272. Roy and Phil recommended I use the 1.97 gasket. Noel of Noel's Engines in Fla also recommended the 1.97 and using the 617 seal rings (shims) on the pre chambers, no measuring required. I believe they are 2 mm thick.
|
The factory spec for the pre-chamber protrusion distance beyond the mating surface of the cylinder head is 7.6 - 8.1 mm. I don't believe you can use the 2.00 mm 617 shims / washers, believe the diameter is smaller on the 617 seals.
If the pre-chamber is at 8.1 mm protrusion prior to milling and you mill 0.254 mm (0.010")= 7.864 mm + 2.00 mm 617 shim == 9.864 mm.
If the pre-chamber is at 7.6 mm protrusion prior to milling and you mill 0.254 mm(0.010")= 7.346 mm + 2.00 mm 617 shim == 9.346 mm.
In a case where you mill 0.127 mm (0.005") , the error is larger.
For the 2.00 mm shims to work you would need to mill more than the FSM maximum amount of 0.500 mm.
As far as the head gasket no. 3320, the additional thickness of 0.23 mm seems to me to have no affect on valve clearance or whatever the purpose of the 0.23 mm is.
Correct me if I'm wrong.