Cracked exhaust manifold... how bad?

[TheRussian]

I have just found that I have a crack in my port side exhaust manifold. Engine# 0D843814. I am not sure how long it has been there, but this is my first year with the boat and I still learning my way around the engine. By the looks of the rust it may have been a while. I have used the boat this season without any problems, no water in the oil. The boat was supposedly been winterized professionally and maintained at a marina by the previous owner. How bad does it look and how urgently do I need to replace it?

 

[hall832]

Re: Cracked exhaust manifold... how bad?

it looks like the beginning of surface corrosion.
Are you leaking water out of it?

 

[TheRussian]

Re: Cracked exhaust manifold... how bad?

If you look closely you can actually see the crack there too. I have not had it running after discovering the crack today. Maybe I will run it in the driveway tomorrow and see if it is leaking water. Am I good for now if no leak?

 

[achris]

Re: Cracked exhaust manifold... how bad?

On the outside, it be can seen. A bit of water in the bilge you will get ... Inside the crack?... Fill your engine with water it will....

Chris.....
(Strange I am feeling today)..

 

[TheRussian]

Re: Cracked exhaust manifold... how bad?

Haha.... What?

 

[achris]

Re: Cracked exhaust manifold... how bad?

You can only see the crack on the outside of the manifold... You can't see if it's cracked inside, and if it is, then that will fill your engine with water. rolleyes: Have you never seen "Return of the Jedi"?)

Chris....

 

[hall832]

Re: Cracked exhaust manifold... how bad?

You said you checked the oil and it was good.
you can usually get a minimum of three years out of your manifolds( provided you flush your motors)
take a awl to the spot and see if you can remove the corrosion. get down to good iron.
and if its just surface you need to get it under control or it will spread fast.

 

[MarkSee]

Re: Cracked exhaust manifold... how bad?

.. Have you never seen "Return of the Jedi"?)

Many times; I think Yoda has more hair than you.......and much more than me.:embarassed:

Personally, I would replace the exhaust manifolds and not worry about it 1 day leaking internally then possibly causing.....

Mark

 

[achris]

Re: Cracked exhaust manifold... how bad?

.... I think Yoda has more hair than you.......

Only just

Personally, I would replace the exhaust manifolds and not worry about it 1 day leaking internally then possibly causing.....

Mark

Me too... That crack, especially where it is, looks a lot like freeze damage... Without taking the manifold off and checking it... A crap shoot...

Chris.....

 

[bonzoscott]

Re: Cracked exhaust manifold... how bad?

Many times; I think Yoda has more hair than you.......and much more than me.:embarassed:

Personally, I would replace the exhaust manifolds and not worry about it 1 day leaking internally then possibly causing.....

Mark

My guess too. Had the same happen with winterization and not poking some wire in the port to clear rust. Water stopped up and she froze over winter. Replace exhaust and keep an eye on oil (for water).

 

[hall832]

Re: Cracked exhaust manifold... how bad?

Oh my, I didn't see he hailed from Canada. My knowledge is strictly Southern Florida and Caribbean.

 

[achris]

Re: Cracked exhaust manifold... how bad?

Oh my, I didn't see he hailed from Canada. My knowledge is strictly Southern Florida and Caribbean.

Yeah, apparently it gets a bit cool up there... Being from Perth I don't get to do all that winterising stuff either... I use my boat 12 months of the years... (Cue Bondo, with his 'walking across the lake' comments :facepalm: )

 

[hall832]

Re: Cracked exhaust manifold... how bad?

never mind

 

[hall832]

Re: Cracked exhaust manifold... how bad?

Yeah, apparently it gets a bit cool up there... Being from Perth I don't get to do all that winterising stuff either... I use my boat 12 months of the years... (Cue Bondo, with his 'walking across the lake' comments :facepalm: )

We have Boating 12 months out of the year Two boating seasons. Local boaters and when the birds come. Fishing has been so good. Wahoo and Black Fin.

 

[achris]

Re: Cracked exhaust manifold... how bad?

This winter we had some of the warmest water ever... 21? when it was flowing to the North!!! Unheard of... And yeah, the fishing's been really good... (Oh, that 21, is C. 70 in the Funny scale...)

 

[hall832]

Re: Cracked exhaust manifold... how bad?

You ever catch Barramundi heard they are good sport

 

[achris]

Re: Cracked exhaust manifold... how bad?

Many years ago, about 2,000 miles north of here... And yeah WOW on a line!!!

 

[Mbrgr1]

Re: Cracked exhaust manifold... how bad?

Looks like a drop of water in the picture! It's freeze damage I'll bet, the crack is pretty clear. It may last awhile, maybe a good winter project to get it off and see what the total damage is.

 

[TheRussian]

Re: Cracked exhaust manifold... how bad?

Thanks for the recommendation guys. I think that I will just run the engine this season to winterize it (maybe take the boat out for an hour if I can find the time before it gets cold) and replace the manifold in the spring.

But you guys really need to stop rubbing in the "boating 12 months per year" thing... it's really depressing! haha

 

[PS94]

Re: Cracked exhaust manifold... how bad?

I had an identical crack. it never hurt my motor, but got worse and worse, and i attempted to have it welded, and it still leaked. just change it for the peace of mind....