RWD - Update: Unable to Torque Crankshaft Bolt

Volvo RWD 200 Forum

INDEX FOR 10/2019(CURRENT) INDEX FOR 7/2006 200 INDEX [<<]  [>>]


Update: Unable to Torque Crankshaft Bolt 200 1980


The crankshaft has a keyway cut into the outer diameter that the belt sprocket fits on to.
The keyway will align with an aluminum rib casted into front of the engine just behind the sprocket.
This will put the number one piston at the TDC everytime it makes one revolution. It's just that simple.

Now this is where the cam comes in. It decides whether you are on going onto a power stroke or ending an exhaust stroke. The valves will be closed in both positions.
The cams lobes that are over the front cylinder will not be pointing down and pressing on the valves shim buckets.

Just like on the crankshaft there is a dot on the camshaft sprocket that will appear at the top and align with the mark at the top on the engine.
Mechanically speaking it is doing the same thing over and over every revolution!

It the locating of the ignition distributor, firing at or on number one, that decides the firing positions throughout the running of the engine.

I torque the bolt to 45 foot pounds and then hit it with an air impact wrench until it moves almost one flat farther around. I say almost because, if I can't get it to that point, I then figure that the impact has quit moving it, it has gotten it tight enough! You definitely don't want to move it any farther than that one the flat. So for me, it's a safety limit not to over stress the bolt!

Using the rope trick won't hurt anything as long as the cam lobes are pointing up in what ever cylinder you want to use.



New Timing Belt and Crankshaft Pulley in B21F Engine [200][1980]
posted by  1908242DLa  on Fri Dec 28 12:26 CST 2018 >

Cut and paste link:

<< < > >>

Users marked in green are currently online.

©Jarrod Stenberg 1997-2016. All material except where indicated.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.

All participants agree to these terms.
Powered by Denizen - Custom Software for Enthusiasts