Crank shaft pulley Bolt/putting on new timing belt.

NATE621

MEMBER
1990 ACURA INTEGRA
1.8L
4 CYL
FWD
MANUAL
140,000 MILES

1990 acura integra gs b18a1 motor, stuck on the crank shaft pulley bolt, been told to feed a cotton string down one of the piston holes to get the motor to I guess seize so I can break the bolt loose from the crank shaft pulley. Book says to get a chain wrench though so thats what id like to do. Measured around crank shaft pulley getting 18 inches. Does that mean I get 18 inch chain wrench?

Image (Click to make bigger)

1 Reply

CJ MEDEVAC

MECHANIC
11,004 POSTS

A chain wrench is adjustable by "hooking" the next set of pins on the next link.

So you are gonna need a wrench with "more than" 18" of chain, maybe 24"? Or what ever is available.

Think a strap wrench would work?

How 'bout what I try when doing a similar task?

I wrap the original belt (or a sacrificial one) around the pulley, all of the way around the the pulley. I double it back on itself and shove a piece wood/ file/ flat metal/ etc into the "double back fold" (this would be the handle). Depending on the force needed, I might even "vise grip" my improvised handle to the belt fold to prevent slipping.

Basically, it's a homemade strap wrench.

Google "strap wrench" and click on "images" to see what you are sorta duplicating!

Return with a grin!

The medic

Image (Click to make bigger)