My recently purchased project car, 1988 300E, has sheared motor mount brackets (the metal bracket bolted into engine block) Does anyone know the torque spec. for these bolts?

Your assistance is very much appreciated.

__________________
2008 GL320CDI 6K
1970 280SL 112K
1982 240D 210K (Sold)
1973 220D 220K (Sold)
1967 200D 160K (Sold)
1992 400E 139K (Sold)
1988 300E 148K (Sold)
1987 300D 257K (Sold)
1991 300E 108K (Sold)
1987 300E 131K (Sold)
1978 300D TMU (Sold)
1980 300D TMU (Sold)
MBCA Member

No published spec in MB books, rule of thumb for 10mm bolts is 40-50nm(25-30ftlbs)

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MERCEDES Benz Master Guild Technician (6 TIMES)
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Appreciate the help. Motor Mount brackets hopefully coming this weekend. Interested in why they appear to be made of aluminum (safety impact reasons??).

__________________
2008 GL320CDI 6K
1970 280SL 112K
1982 240D 210K (Sold)
1973 220D 220K (Sold)
1967 200D 160K (Sold)
1992 400E 139K (Sold)
1988 300E 148K (Sold)
1987 300D 257K (Sold)
1991 300E 108K (Sold)
1987 300E 131K (Sold)
1978 300D TMU (Sold)
1980 300D TMU (Sold)
MBCA Member

Brother of The Benz, CarolinaMBZ
The only reference I can find to your engine mount extention is in the Service Manual, Engine 103, section 01-310.
There are no torque values, just referenced as item 122.
As MBDOC said, use rule of thumb for the cap screw size.
Happy Trails Beep Beep from The Spiderman in Houston!!!