1985 Volvo Penta AQ125B bell house bearing?

[djjojola]

Ok folks. Some sea water entered the bell house bearing or primary drive shaft bearing. From what I can see the bearings are tight, no movement or grinding noise. I feel I need to change the bearing before it rusts. So do I need to pull the engine out to change that bearing or can it be done from the back of the boat? Almost forgot outdrive is a volvo 270.

 

[captmello]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Your housing should be the single bearing type. I've heard it "can" be changed without pulling the motor but haven't tried it myself.

Let us know how it goes.

 

[n_waite]

Re: 1985 Volvo Penta AQ125B bell house bearing?

I have a similar problem. I think my bearing is seized, stopping the engine from cranking.

From what I have read, it looks like the engine must be pulled. Please let me know if there is another way.

Thanks.

 

[captmello]

Re: 1985 Volvo Penta AQ125B bell house bearing?

I have a similar problem. I think my bearing is seized, stopping the engine from cranking.

From what I have read, it looks like the engine must be pulled. Please let me know if there is another way.

Thanks.

Depending on the type of flywheel housing you have, you either have one bearing or two. Some have said you can change the single bearing type without pulling the engine. Most of the four cylinder engines have the single bearing type. Personally, I believe pulling the motor is the "proper way".

n_waite, you should start your own thread if you would like help with your project. It sounds like you may have additional issues.

 

[djjojola]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Since the three mechanics I spoke to wants to charge $1500 to change the bearings by removing everything. I think I am going to try this myself. I don't have an engine puller so I'll work from the back. I will post and attatch photos of the destruction or completion of this project. I hope my success and/or mistakes will help others with the same problems.

 

[Don S]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Just be very careful you don't mess up the splines. Some have put brass or copper between the splines and some big vise grips and had success.
I have not been that lucky when dealing with salt water boats, they usually have the shaft rusted into the flex plate as well as the bearing being bad.

 

[djjojola]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Before I get started I'd like to double check with you guys. Do I need to pull the PDS (primary drive shaft) in order to change the bearing? or can I just pull the bearing and repress into place leaving the PDS in place?

 

[Don S]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Yes you do, the bearing is pressed onto the shaft.

View attachment Overhauling the Flywheel Cover.pdf

 

[djjojola]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Ok, I've removed the first seal, removed both large snap rings, used a pair of large vise grips and to my surprise the PDS came out with no problem. Removed the small snap ring and then bearing with a bearing puller. All with no problem. The bearings did have signs of rust on the surface.

Now the problem, how do I take out that last seal? I'd like too replace everything since I have the PDS and components out.

Used a flashlight and every thing in the bell housing is beautiful and clean. No water penetration past the second seal. Heads up I've already tried to remove second seal and tore it so now it needs to be replaced.

 

[captmello]

Re: 1985 Volvo Penta AQ125B bell house bearing?

I've only done my two bearing type so I'm not positive, but from the diagram Don Posted, it looks like you just need to fish the last seal out one way or another. Note that the open side of the seals face away from the bearings at install.

glad to hear its going smooth so far!

 

[djjojola]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Thank you for the reply but according to the diagram "Install the new, inner sealing (5) using special tool part no 884838-4. The sealing is installed with its “opening” facing outwards". If the opening is facing outward than and the bearing goes in after that seal when installing than I think the opening must face the bearing. On the other hand the outer or last seal should have the opening facing away from the bearing. Please correct me if i'm wrong. This is all a first for me.

 

[captmello]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Thank you for the reply but according to the diagram "Install the new, inner sealing (5) using special tool part no 884838-4. The sealing is installed with its “opening” facing outwards". If the opening is facing outward than and the bearing goes in after that seal when installing than I think the opening must face the bearing. On the other hand the outer or last seal should have the opening facing away from the bearing. Please correct me if i'm wrong. This is all a first for me.

after rereading, I believe you're correct!

 

[Don S]

Re: 1985 Volvo Penta AQ125B bell house bearing?

You can't replace that seal unless you pull the engine. Changing the bearing without pulling the engine is nothing more than a short cut, not how the job should be done. You also can't check the flex plate or pilot bearing for damage.

 

[djjojola]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Hi Don. I did pull that last seal #5. I had to bend it. I was very careful not to damage the bell housing surface. It all looks good. There is a lip at the end or inside rear where the seal sits against, so the seal cannot fall inside of the fly. it can only be pulled from the outside unless the engine is remove and the seal is pushed out from the inside. Well all that is left is to buy the two seals and bearing and reinstall.

The pilot bearing from where i'm looking looks pretty good. should this bearing be greased?

I was so intimidated taking on this job. But thanks to IBOATS and the outragous price quoted from two boat mechanics I rolled up my sleeves and tried it. Thanks

I will continue to post on the installation.

 

[Don S]

Re: 1985 Volvo Penta AQ125B bell house bearing?

If you can replace the seal great. I was thinking it came out from the front, don't have one sitting next to the computer.
There is no way to check the flex plate except to look at the splines.
You can put grease on the end of the shaft when you put it back in, and if you do have the ball bearing type pilot bearing, you have no way to grease the bearing itself. Not a big deal to grease the bearing, it doesn't turn, it just keeps the shaft centered in the crankshaft. Cars normally use a bushing.

 

[djjojola]

Re: 1985 Volvo Penta AQ125B bell house bearing?

Hello again. It's been awhile. Sorry for taking so long to reply. I'm Broke right now and it took a while to accumulate enough money and time to get all the parts. Although the parts are relatively inexpensive, when you don't have the money its expensive. I took a week off of work and worked on the boat. I installed the first seal open side facing out. Pressed the new bearing onto the drive shaft and attached the C clamp. I had a hard time putting the spline in with the new bearing but after some patience and persistence I was successful. Installed the other two C clamps and wala all done with the bearing replacement. Reinstalled the Volvo 270 stern drive. Boy was that a task but complete. All that is left is to test out and in the water. Thank You Don, Captmello and IBoats for all your help. You guys are the best>