I recently replaced my engine and one thing has been bothering me because I seem to have issues with poor idling. Anyway plastic intake manifold has 7 bolts holding it in place. Manual tells me to torque those bolts to 20nm. When I tried doing that, I almost stripped one of the bolts, new bolts by the way. I can get at most 15nm before it feels like bolt starts stretching or atleast something feels like it's about to give up. No way I want to snap bolts or crack the plastic intake manifold. I was even wondering if my torque wrench is bad but I have not had any issues using it elsewhere. It ranges from 6-30nm.

Is the service manual wrong by telling me to torque to 20nm? Or do I really need to buy another torque wrench?

Borrow another torque wrench to compare.

7 minutes ago, Breezy_Pete said:

Borrow another torque wrench to compare.

I would if I knew someone who had one that can do 20nm. Everyone I know hand tightens smaller stuff and use torque wrenches that start like from 30nm.

Just do it by feel then. Doubt it matters much.