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Old 01-09-2013, 06:56 AM   #141
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The question is what is the downside to a leaking exhaust manifold?

Just a bit of exhaust or a water leak would be handeled by the blower or bilge pump.

The use of extreme power (not contemplated as you don't carry the fuel) might crack the manifold.

Your local NAPA will have muffler cement , might be worth the few bucks for a supply.

If you wait for a perfect boat and a perfect time , it could be decades.
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Old 01-09-2013, 07:29 AM   #142
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The problem is that I'm at Rio, going to Fort Lauderdale just next 17 and intending to start our cruise on 21.
The mechanic said that dont have room to work as well and maybe need to get out the head.
I know that my mechanic here in Brazil extract the bolt and replace it.
I think that I can cruise with just 7 bolts, the new manifold is strong enough to hold there with just 7 bolts.
The engine just work about 700 hours and than I'll fix replacing the bolt
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Old 01-09-2013, 07:46 AM   #143
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Greetings,
Good Luck. I wish you well.
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Old 01-09-2013, 10:07 AM   #144
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I would not leave the dock with a head bolt broken, on any engine.
OP: "I saw that one of the 8 bolts for my manifold is missing..."

That isn't a head bolt.

But, for what it's worth, since the manifold was reported to be leaking already, continued use will blow out the gasket and longer use will erode the mating surfaces so that a replacement gasket will fail very shortly afterward.

No amount of magic sauce will seal this leak or eliminate the need to repair the problem correctly before putting another thousand or so hours on the engine.
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Old 01-09-2013, 10:22 AM   #145
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Greetings,
Mr. Rick B. WHAT????? The magic sauce doesn't work???? Je suis day-so-lay!

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Old 01-09-2013, 10:34 AM   #146
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You need to fix that before your trip or you are just asking for trouble.
If you can't get the bolt out, use one of the fix's suggested by RT, or myself. Or to drill and tap the bolt.

The head weigh about 120 lbs.

Replace the head.

I would not want to take a trip as you are intending with a broken manifold bolt.

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Old 01-09-2013, 10:35 AM   #147
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Quote:
Originally Posted by RickB

OP: "I saw that one of the 8 bolts for my manifold is missing..."

.
Aha. Thanks Rick, that clears the cobwebs a bit.
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Old 01-10-2013, 07:03 AM   #148
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With the head off the exhaust gasket surfaces can be trued , as can the exhaust manifold .

No big deal,
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Old 01-10-2013, 01:19 PM   #149
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My mechanic gave us 98% ( I don't know how he calculated) as garantee that the engine will run OK for few years with 7 of the 8 bolts in the manifold. Now we have a new manifold, new gasket and 7 new bolts.
I intend to use for just 2 months and than, take the broken bolt out and put a new one here in Brazil.
I have in my crew, 7 persons that already bought tickets for just go to the States and that already helped to me with the expenses. I must start this trip.
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Old 01-11-2013, 08:49 AM   #150
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already helped to me with the expenses

DO NOT tell this to anyone as the USCG considers this to be a charter.

With over 6 people an uninspected vessel and perhaps no captains license , this could be big trouble.

They are just friends along for the trip, no money changed hands.
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Old 01-11-2013, 12:17 PM   #151
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Thank you for the advise
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Old 01-11-2013, 01:12 PM   #152
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The question is what is the downside to a leaking exhaust manifold?

The smallest exhaust leak will, over a remarkably short period, paint your engine room - and everything in it - a lovely gray tending toward black color

When you notice that the cloud of black exhaust smoke that has been increasing as the trip progesses seems to be getting really dark and go down in the dark hole to see what might be happening, you see that the intake filter is a bit black too. No problem, change it and life is good except for the nasty footprints and black stains on everything that you touched and sat on.

When the gasket blows out the timeline for the above will be reduced to hours, not days.

Otherwise, no big deal.
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Old 01-12-2013, 06:20 AM   #153
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The smallest exhaust leak will, over a remarkably short period, paint your engine room - and everything in it - a lovely gray tending toward black color

A couple of bucks for muffler cement might be worth the effort to plug the hole , so there is no leak.
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Old 01-12-2013, 07:09 AM   #154
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"A couple of bucks for muffler cement might be worth the effort to plug the hole , so there is no leak."
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Old 08-26-2013, 01:08 PM   #155
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I am bringing this thread back because I had to re do the whole thing.

This time it was a blown head gasket.

the issue was not as daunting this time around as I had already done it once.

still lots of wrenching.

The issue was that the last time I replaced the head gaskets. I was given the wrong gasket by the cat dealer. My engine is a 1974 vintage. The new gasket is for a sleeved engine of which I have one cylinder that is sleeved.

With the new and improved head gaskets comes new torque specs and a stronger head bolt.

after draining the coolant I broke the engine down and pulled the heads off. I will post pictures of what happens to an engine when the head gasket lets go. Not a pretty sight.

The overheating came from a leaking red dot heater. I was at idle running the hydraulic davit pulling a set of shrimp pots. I smelled coolant and checked the engine temp. It was pegged. I shut her down and waited about a half hour and started up again. I looked at my dry stack it looked like an old time picture of a steam locomotive.
As I was only about a 1/4 mile from the harbor I idled back in and pulled the oil fill cap there was about a 1/4" of white creamy gunk on the end of the fill cap.

This time I have about 10 hours into the gasket exchange. I started the motor and still had some white smoke. Back in the engine room I discovered a leak in the gasket at the end of the exhaust manifold. I am leaking coolant into the exhaust at the end. I tried tightening the bolts but to no avail. I released the pressure at the heat exchanger and the drip stopped.
I am hoping that was the cause of the white smoke. It was not a billowing cloud just a white smoke that dissipated about 30 ft from the boat.

Question: What is the best way to clear the motor of any residual emulsification. I have heard of using a few quarts of diesel in the oil. I have also heard of using ATF or marvels mystery oil.
Any suggestions short of pulling the entire engine.
(which is not going to happen)

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Old 08-26-2013, 02:48 PM   #156
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Question: What is the best way to clear the motor of any residual emulsification. I have heard of using a few quarts of diesel in the oil. I have also heard of using ATF or marvels mystery oil.
Bummer, sorry to hear that.

Drain all the oil you can. Refill with the cheapest oil you can buy. Replace oil filter(s). Run until warm, drain and refill with more cheap oil and filter.

Install good filter and fill with good oil.

Run engine around the harbor for a while at moderate load then take an oil sample and do a "crackle test" on it to check for moisture. If there is none or very little, run the engine normally for a few hours and take an oil sample to check for sodium and coolant. Hope for the best, it is not the end of the world and is fairly common as disasters go, much more angst than damage usually if you get right on it.
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Old 08-26-2013, 03:13 PM   #157
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Thanks Rick. You solution sounds the best I have heard. You know how it go's everybody has advise.

I wasn't sure I wanted to go with the magic sauce.
she sounds great if the coolant leak is just that gasket at the end of the exhaust manifold. .. I have my fingers crossed on this. If I did something wrong on the head gasket this time. I'm re powering.

The crackle test is fascinating I can't wait to try it. I hadn't heard of that but a quick search on google turned up exact instructions and what to look for.

Fantastic advice thank you sir.

SD
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Old 08-26-2013, 05:50 PM   #158
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Thanks Rick. You solution sounds the best I have heard. .
SD: How about posting a close-up photo of your boat. I think you have one when the boat was on the hard. I remember it as being a really nice (salty) 32 footer?
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Old 08-26-2013, 06:30 PM   #159
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Sure here you go
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Old 08-26-2013, 06:33 PM   #160
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Sure here you go
See! That's a "good lookin" trawler! I love it!
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