luxdriver

I realize this question has been asked many times and most often the answer is 23 or 25 ft lb for the motor mount top bolts. There are several motor mount DIY's stating 25 ft lb. My car (99 C2) has M8 grade 8.8 bolts for which I believe 17 ft lb would be more appropriate. I have seen one reference to the workshop manual stating 17 ft lb.

I changed my mounts yesterday and initially torqued to 25 ft lb which seemed excessive. I've since reverted to 17 ft lb. Hope no permanent thread damage was done. The threads are in a steel nut welded to the sheet metal. Worst case a longer bolt and nut could be used to secure the mounts.

Thoughts? Is everyone just using 23 or 25 ft lb on these bolts?

De Jeeper

I cant imgine u did any damage. I would be more concered if u were torquing into aluminum.

Skyman911

I swear my service manual stated 23 ftlbs. That's the value I used.

DBJoe996

I would say anything tight enough to hold them in place. They don't really do much anyway, the weight of the motor is pulling down on the motor mounts. They aren't going to go anyplace.

dporto

You’re really just securing the nuts from vibrating loose - if you’re worried about that at 17 ft lbs just throw a spot of blue loctite on it and be done...👍

luxdriver

Thanks all for your responses. 17 ft lb it is then. I will check on them each time the air box comes out.

ssgunny

I just replaced the rear mounts the other week. I reinstalled mine based on “feel” from when I took them off as they took little effort to do so. I did use blue loctite on them when I reinserted them.