Jump to content

 

Welcome to TheMalibuCrew!

As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. It's free and it's easy, so don't hesitate to join the TheMalibuCrew Family today!

KNB

Crankshaft Snapped at pulley on 383 Hammerhead

Recommended Posts

KNB

Have had numerous problems with the engine in my WakeSetter this season ranging from new computer, new distributor, O2 sensors, Crankshaft sensor, fuel pump (all of which Malibu Dealer insisted was malfunctioning) and now, snapped Crankshaft just outside the engine behind the pulley.  This actually happened this week as the boat was being water tested by the mechanic after he installed new fuel pump and crankshaft sensor indicator.  Engine has 400 hours on it and boat/engine have been serviced, stored and maintained at dealer who sold it, following all their service recommendations.

Needless to say after spending thousands on repairs this season to date (not to mention only able to use the boat for two weekends in between repairs), to now have to either repair or replace the motor is frustrating.  

Trying to determine what direction to go with this and looking for ideas?  Many thanks!

Share this post


Link to post
Share on other sites
Falko

Like right behind the harmonic balancer? Odd place as there is little no shear there, unless it was a bad balancer and causing undue harmonics on the crank.

Share this post


Link to post
Share on other sites
JasonK

More hammerhead problems, that sucks.

Share this post


Link to post
Share on other sites
Rednucleus

Year boat? Brand new to you from dealer or previous owner? Previous problems before this season?

Share this post


Link to post
Share on other sites
MadMan

It's happened before:

On ‎7‎/‎10‎/‎2015 at 6:31 PM, rychuk said:

I recently had my crank snap off where it connects to the harmonic balancer. P.O.S. cast/forged crank had a lot of flaws in the casting.

Got a new solid machined steel crank now and upgraded bearings and timing kit. Engine is back in the boat at my mechanics shop. He is great but not sure how to align the engine properly.

I am planning on taking it into a trusted marine shop who work on bu's all the time.

Question is - is there anything my mechanic can do or watch for when putting the engine back in? I was planning on doing a very light water test to make sure it is running ok prior to taking it back to the professionals.

Engine is a HH in 2009 LSV. Fingers crossed it runs! So far I think I have gotten off light.

 

Share this post


Link to post
Share on other sites
KNB

Yes, snapped right behind the harmonic balancer. Year of boat is 2008. I am second owner and have owned it for 4 years. No problems at all before this summer. 

Share this post


Link to post
Share on other sites
Bozboat

Insurance coverage?

Some policies have catastrophic engine failure coverage, 

Share this post


Link to post
Share on other sites
MLA

Have you manually turned all the belt driven accessories? 

Share this post


Link to post
Share on other sites
Sixball

It would be nice to see a good picture of the end of the crank!

Share this post


Link to post
Share on other sites
KNB

All belt driven accessories turn and the engine turns as well so no apparent engine-driven issues.  Just the snapped crank.  Unfortunately, can't post pics.

Share this post


Link to post
Share on other sites
Sixball
12 minutes ago, KNB said:

All belt driven accessories turn and the engine turns as well so no apparent engine-driven issues.  Just the snapped crank.  Unfortunately, can't post pics.

If you have pictures they could be posted using  Imgur or other links.  I think it will show a long term failure but It may also show casting issues.  I do not think it has anything to do with driven issues. I have seen this before not in marine but yes auto. 

Share this post


Link to post
Share on other sites
KNB

So is there an opinion on repair or replace the motor?

 

Share this post


Link to post
Share on other sites
carguy79ta

I would say replace, unless you can rebuild it yourself. A crate motor shouldn't be too much $. 

Share this post


Link to post
Share on other sites
Sixball

You can not rebuild it on your own. You will need A new crank and it will need to be balanced. So you will need A good speed shop for that. If you don't have experience and tools its not a good time to go to class. Its not just bolt things together!

Share this post


Link to post
Share on other sites
BaBaLoO
On 2018-09-06 at 9:04 AM, KNB said:

So is there an opinion on repair or replace the motor?

 

Sometimes you can’t put a price on piece of mind. I’d go the replace route. 

Share this post


Link to post
Share on other sites
Sixball

As with many of the topics on the forum it very hard to just give you a simple answer. It has many parts to give thought. Are you able to do some or much of your own work? Would yo like any different aspects to the power you have now? What expertise you can trust do you have in your area?  What will you do with the old engine? It has value.  What are the difference in cost?   What do you replace it with, A new crate engine or A creditably company rebuild?  If you are like me you are going into a long layoff to have work done. But it would be good to make a move and have things done before a new season. 

Share this post


Link to post
Share on other sites
MadMan

Your crankshaft reminds me of an old crankshaft specialist's (maybe out of Memphis) slogan:

"if it ain't broke, we can fix it".

Share this post


Link to post
Share on other sites
KNB

Thanks for the comments. My marina says they cannot find a remanufactured motor but have come across a new Indmar 6.2 L Hammerhead fully built and never used from a Re-seller.  Just missing the intake and exhaust manifolds. Don’t think Indmar makes them anymore so thinking it could be a few years old. Any concern on gaskets, seals, internal rust or solidifying build lube?

Also, where would I advertise the old one. It still runs on the battery and has new distributor, plugs, wires, crank shaft sensor, computer?

thanks again. 

Share this post


Link to post
Share on other sites
JeffK
1 hour ago, KNB said:

Thanks for the comments. My marina says they cannot find a remanufactured motor but have come across a new Indmar 6.2 L Hammerhead fully built and never used from a Re-seller.  Just missing the intake and exhaust manifolds. Don’t think Indmar makes them anymore so thinking it could be a few years old. Any concern on gaskets, seals, internal rust or solidifying build lube?

Also, where would I advertise the old one. It still runs on the battery and has new distributor, plugs, wires, crank shaft sensor, computer?

thanks again. 

If you are at that point, I'd call Indmar.  Those guys are wonderful to deal with and know their stuff.  Get the details on that motor you found and call them.  They can help you out.

Share this post


Link to post
Share on other sites
CanVLX

The hammerhead is a marinized ZZ383 crate motor. The crankshaft is available but is spendy. I would take the advice given above and call Indmar as they really are great to deal with and will help you as much as possible. 

I beleive this is the replacement https://paceperformance.com/i-6255227-12489436-cpp-1053-forged-steel-crankshaft-used-in-ht383-and-zz383-crate-engines.html

 

Share this post


Link to post
Share on other sites
Woodski

@KNB:  If you consider the reman your marina found, make sure it is marine compatible, brass core or freeze plugs, correct cam (not sure if your hammerhead uses the ZZ4 cam or a marine grind, Indmar can tell you).  You will find once you step up from a base crate engine, they price tag does escalate pretty quickly which along with a potential warranty option will influence your decision.  If you have the appropriate resources, a crank swap should be the most economical route with the assumption the source you select will do it correctly and as noted make sure the reciprocating parts are all balanced.  All the other issues you note may also determine your decision.  400 hours on all the rest of the parts is very low so they should be in great condition.

Share this post


Link to post
Share on other sites
Falko

I thought the HH400 had a forged crank like prior HH engines. I'm amazed they have an issue with snapping.

Share this post


Link to post
Share on other sites
KNB

Thank you all.  Woodski, I've been told it is not a reman but an original, Indmar manufactured hammerhead that has been sitting on their shelf for several years.  zero hours, never fired.  has everything but the distributor, ecm, intake and exhaust manifold and wiring harness.  Indmar suggests I have them replace the fluids, prime it up and make sure it is pumping fluids correctly.  if so, they think it should perform fine over time.  No need to replace gaskets, seals, etc.  I'm leaning that way but waiting for a price to rebuild mine.  most shops (and my mechanic) are uncomfortable just replacing the crank, assuming there must be some other issue with the motor since the breakdown is so unusual.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...