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#1
03-11-2020, 07:37 PM
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M103 maximum cylinder head surfacing?
What is the allowed tolerance measurement for re-surfacing a m103 cylinder head?
Just got my head back from the machine shop and they said there was no warpage although according to my receipt paperwork they shaved off. 005" which is 0.127mm. 
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#3
03-11-2020, 09:28 PM
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@ .005" don't loose .0000005 second of sleep...you are good to go! That was just a clean up for good measure. I'd suggest a genuine MBZ head gasket.
Good luck!!!
__________________
"Rudeness is a weak man's imitation of strength" - Eric Hoffer
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#5
03-12-2020, 10:24 PM
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My 104.980 is milled 0.031" below minimum spec
 As long as you correct cam timing and ensure piston to valve clearance, you can cut a ****load off.
__________________
 90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff
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