help with this problem!!!

[betayv]

hello there I have a 1979 cruiser barnegat with a mercruiser 228 305 I have to replace the harmonic balance, I used the puller take out the old one, install the new one and the problem is the center bolt I guess the one that screw in to the crankshaft the thread is bad, I went and buy a new bolt same thread and lenght and nothing is not tying what can i do?

 

[chiefalen]

Re: help with this problem!!!

Tap it one size bigger, and grease the shaft so it goes on easier.

 

[Don S]

Re: help with this problem!!!

I went and buy a new bolt same thread and lenght and nothing is not tying what can i do?

Explain the underlined part.

Did you get an OEM bolt or just some bolt with the same thread and length?

 

[Don S]

Re: help with this problem!!!

Tap it one size bigger, and grease the shaft so it goes on easier.

WHAT?????? DO NOT tap the crankshaft one size bigger.

 

[a70eliminator]

Re: help with this problem!!!

Did you muck up the snout with that puller tool? Maybe you need to caress the top couple threads, they go pretty deep I can't imagine they're bad all the way.

 

[betayv]

Re: help with this problem!!!

ok I went to the boat yard and buy the bolt and I went and bought another same size and lenght and probably go in about 3 complete turns and I can feel when miss the thread and again 3 turns and miss.

 

[a70eliminator]

Re: help with this problem!!!

Big ol 7/8" fine threaded bolt right? I would run a tap and clean the threads before anything else. Someone may have used a hammer on the crank snout at one time or another and it's slightly mushroomed.

 

[betayv]

Re: help with this problem!!!

number 18 on the picture

http://www.mercruiserparts.com/Show...0&bdesc=INTAKE+MANIFOLD+AND+FRONT+COVER+(260)

 

[Bt Doctur]

Re: help with this problem!!!

Most likely your tool didnt include the snout protector or you removed the balancer without using the bolt to protect the threads.If so , get the proper sized tap and use that first to clean the threads or be prepared to replace the crankshaft.

 

[Bondo]

Re: help with this problem!!!

Most likely your tool didnt include the snout protector or you removed the balancer without using the bolt to protect the threads.If so , get the proper sized tap and use that first to clean the threads or be prepared to replace the crankshaft.

Ayuh,... What BD says......

 

[betayv]

Re: help with this problem!!!

protector was there I think was a problem before I bought the boat last year and is not the first time I found a bad bolt, So what should be the final suggestion?

 

[Bondo]

Re: help with this problem!!!

protector was there I think was a problem before I bought the boat last year and is not the first time I found a bad bolt, So what should be the final suggestion?

Ayuh,....

If so , get the proper sized tap and use that first to clean the threads or be prepared to replace the crankshaft.

 

[mkast]

Re: help with this problem!!!

Tap it one size bigger, and grease the shaft so it goes on easier.

Is there a two drink minimum with this comedy show?


Some poeple use heli-coil's to repair damaged threads.

 

[betayv]

Re: help with this problem!!!

ok thanks for all the help this is what Im going to do BUT NOT TODAY today is baseball game day USA vs VENEZUELA in the world classic baseball, tomorrow I will use a tap with the same size to see how works and if not I will use the next size.

 

[Bt Doctur]

Re: help with this problem!!!

Be aware that the crank could be hardened there.

 

[rodbolt]

Re: help with this problem!!!

betayv
are you from Venezuela?
if so I can get you better instructions in spanish.
in fact my wife is from Caracas and happens to be a translator.
couple that with the fact I can actually make her remove and install a balancer
life may be sweet

 

[betayv]

Re: help with this problem!!!

oh que bien saludos but is ok you can give me instructions in english and espanol, I used to work for NAPA for 9 years, now Im working with carquest, what is your suggestion, today I asked like 25 mechanics and all of them have diferents opinion.



IS RAINING DOWN HERE BUT WE READY TO WATCH THE GAME!!! THANKS...

 

[Provo5]

Re: help with this problem!!!

I would try to clean it up with a thread chaser, if that don't work helicoil it.

 

[betayv]

Re: help with this problem!!!

ok I keep trying to solve this problem, The bolt that was in the boat before look like is a 7/16 the bolt that I found at the boat yard is a 3/8 16, I been trying to find out the exact size of this bolt I have a mercruiser number but not espec about the thread the mercruiser # is a 1072626 thanks.