Replacement - 740 Turbo crank shaft front oil seal.

[Bill Chan]

I have a 1990 Volvo 740 Turbo station wagon, oil is pouring out from the
front of the engine. I took the cover off the timing belt and it was soaked
with oil also. The front oil seal for the crank shaft has failed ( over
300000Km on this seal ).

I have to take the bolt off the front pulley which is attached to the crank
to get to the seal, but I have no way of stopping the crank from turning
over, whenever I tried to undo the bolt, the crank will turn as well.

Has anyone done this seal replacement before and know of a way of stopping
the crank from turning when you take the pulley bolt out. Help is much
appreciated.

Bill.

 

[James Sweet]

You can pop off one of the inspection covers on the bellhousing (assuming
this is an auto) and wedge a wrench in there on the bolts that hold the
torque converted to the drive plate.

 

[ALRHALL]

I have to take the bolt off the front pulley which is attached to the crank
to get to the seal, but I have no way of stopping the crank from turning
over, whenever I tried to undo the bolt, the crank will turn as well.

Has anyone done this seal replacement before and know of a way of stopping
the crank from turning when you take the pulley bolt out. Help is much
appreciated.

Bill.

The dealers and others sell a tool to hold the crankshaft pulley while you
remove the bolt. OR.. This method is crude but it works for me.
Using a socket, breaker bar and a short piece of pipe. Brace against the
driver side frame rail. Crank the starter for 1/2 sec. Presto he bolt is loose.

Check the flame trap. A clogged flame trap can fail that seal.