View Full Version : Changing rear main seal

01-14-2007, 04:29 PM

I'm planning to replace the rear main seal on my 93 PS190.
It's a Ford Indmar 351 HO. Does this engine use this kind of seal:

Is it a complicated job to do? Removing the transmission + dampler plate + flywheel is enough to access it?
I will post some pics once I will do it.

01-15-2007, 08:19 PM
From the Indmar manual
1. Remove starter
2. Remove transmission
3. Remove pressure plate....
4. Remove flywheel attaching bolts, flywheel and rear cover plate
Using sharp awl, punch one hole into the seal meatal surface between the lip and block. Screw in the threaded end of Jet Plug Puller or equivilant. Use the plug puller to remove the seal. Use caution to avoid scatching or damaging the oil seal surface.
5. Clean oil seal recess in block and main bearing cap.
1. Clean, inspect and polish the rear oil seal rubbing surface on crankshaft.
Coat new oil seal and crankshaft with light film of engine oil. Start the seal in the recess with the seal lip facing forward and install it with the Rear Oil Seal Replacer Tool or equivalent. Keep tool straight with centerline of crankshaft untill the tool contacts the cyl. block surface.
2. Install cover plate, flywheel and bolts. Torque in sequence across from each other to 75-85 ft-lbs.
3. Install clutch disc and transmission

01-16-2007, 09:58 AM
Thanks Laurel for the removal method! I really appreciate.
As soon as I will start this winter job, I will complete this procedure with some pics.