Starter Bolt Fastening Torque on Volvo 240 engines
My assistant recently replaced the starter on our 1991 Volvo 240 project car with the B230 engine: Starter Removal
Last Updated: 03/29/2016
Parts Group: Starter
The starter attaches to the engine with two long 18mm bolts. I can imagine that too-loose starter bolts can't be a good thing, but on our project car, the top bolt had been a minor nightmare to remove, so overtorquing isn't great either.
Even so, I could not find the torque specs for when she was putting the starter back on. I looked in both the Haynes and Bentley manuals for the Volvo 240 Series. I could not find the information in there. I searched the Web, looked on forums ... and I found nothing.
I finally figured out that the torque specs for one kind of engine might often translate reasonably well to another engine too, unless there's a different material involved, like steel vs. aluminum. As far as I could tell, the Volvo engine is iron or steel, so ... I looked up the torque specs for the 1960s Chevy small-block V8 on a website that specializes in such engines. They recommended a range of 25 to 35 ft-lbs. That sounds reasonable to me.