3.0 harmonic balancer

[bige65300]

I have a 1987 searay with a 3.0 mercruiser. The harmonic balancer came apart last week, found rubber in the engine compartment and the pulley was loose. Is this a job that can be done at home? I know I have to remove the front engine mount, and use a puller. I've seen some posts that mention pulling the engine, and I want to know if this can be done with out going that far.

 

[Don S]

Re: 3.0 harmonic balancer

I've seen some posts that mention pulling the engine, and I want to know if this can be done with out going that far.

It all depends on how much room you have in front of the engine, nothing more. If you don't have room for the puller AND the installer, then you will have to pull the engine out.

 

[Haut Medoc]

Re: 3.0 harmonic balancer

Welcome to iboats.....​

 

[bige65300]

Re: 3.0 harmonic balancer

OK...thanks......Got plenty of room in front of the engine. Will support the front of the engine on a hoist and remove the front engine mount. Will have space to pull and replace the balancer. Just wanted to make sure I wasn't missing something.....

 

[Simoniz]

Re: 3.0 harmonic balancer

Hi Im having the same problem with a 3.0l Merc in a Bayliner.

Did you have any problems doing the job?

My crank has no threads in it and Im pretty sure its one of the designs where the balancer is simply pressed onto the crankshaft with no bolt to hold it on.

In this case, how do I press the balancer back onto the crank?

 

[Bondo]

Re: 3.0 harmonic balancer

In this case, how do I press the balancer back onto the crank?

With a Press that mounts to the Block, rather than the Crank.......

 

[Simoniz]

Re: 3.0 harmonic balancer

Hi Bond o

Thanks for the reply,

please could you elaborate?

Is such a press expensive / easily available, and how and where would it bolt onto the engine block?

Ta

 

[Don S]

Re: 3.0 harmonic balancer

Your best bet would be to start your own thread. Won't be long before the people that don't read all the replies, start answering the original question.
Would also be a good idea to include the year of your engine.

 

[ron7000]

Re: 3.0 harmonic balancer

Harborfreight has a cheap puller for $10 that you might be able to rig to push the pulley on. The typical puller/installer kits run $50-200.
Try renting a harmonic damper installer from an auto store or local garage,
you'll need a kit with threaded adapters so you to screw it on to the end of the crank so you can push the pulley on. This is what the kit would look like

http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_747917_-1_10693

get a 7/16x20 tap and drill-tap the end of the crank. Or, depending on what threaded adapters come with the installer tap to that size, but 7/16x20 is standard.

 

[flabum]

Re: 3.0 harmonic balancer

Try renting a harmonic damper installer from an auto store or local garage,
you'll need a kit with threaded adapters so you to screw it on to the end of the crank so you can push the pulley on. .

4 bangers do not have a threaded hole in the crank for this type of installer. They require a different type of installer..... I have always used a 2X4 and a BFH

 

[achris]

Re: 3.0 harmonic balancer

.... and a BFH

??? Please, explain BFH....

Thanks,

Chris............

 

[Bondo]

Re: 3.0 harmonic balancer

??? Please, explain BFH....

Ayuh,....... That's Big F'in Hammer........

I prefer to rig a Push-on Press,.......

It's Much Kinder to the thrust bearings in the motor than the BFH system......

 

[ron7000]

Re: 3.0 harmonic balancer

4 bangers do not have a threaded hole in the crank for this type of installer. They require a different type of installer..... I have always used a 2X4 and a BFH

that's why i said get a 7x16x20 tap and tap the end of the crank.