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Old 03-18-2003, 05:25 PM
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Join Date: Apr 2002
Location: San Jose, Costa Rica.
Posts: 50
Question 103 Head Torque Values???

I did a search but didn't exactly get the info I needed, my head is coming on tonight and I need the exact torquing procedure in ft/pounds to install the head correctly.
Would apreciate your help as soon as possible.
1987 300 E euro, 103.983..... engine with new head bolts.
Thanks for any prompt info.
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Old 03-18-2003, 06:06 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,126
For a US spec M103 it's 70Nm (~51 lbft) then 90-degrees then another 90-degrees.

Tightening sequence:

12 - 8 - 4 - 2 - 6 - 10 - 14


11 - 7 - 3 - 1 - 5 - 9 - 13

Clean the head bolt bores and oil the head bolt threads before installing.

Doing this without a manual? Have fun.

91 300SE
87 300SDL
83 300SD
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