5.0 L Mercruiser engine froze. HELP!!

paul ames

Recruit
Joined
May 6, 2010
Messages
4
Re: 5.0 L Mercruiser engine froze. HELP!!

spent my life on the water or near it would not go offshore in alaska with cracked block or manifold, easier to get in trouble then back to land
 

tschmidty

Chief Petty Officer
Joined
Mar 24, 2010
Messages
462
Re: 5.0 L Mercruiser engine froze. HELP!!

And I was running inland lakes with a bit of traffic? And the safety of a dead engine happening in my boating location would not create a huge emergency?

I think the poster was pretty clear about the difference between running on nearby busy lake and going 15 miles offshore.

There are plenty of places that could stand a repair like depending on how it got there and where it is. If I was a mechanic there is no way I would recommend it, but if it was my boat then sure I'd probably give it a go.

Of course if it was my boat, I'd hope I'd know enough to winterize it properly and not run it when it is overheating...
 

wakeboardbob

Cadet
Joined
Oct 9, 2009
Messages
20
Re: 5.0 L Mercruiser engine froze. HELP!!

Im sure most "Paid" mechanics would not risk the liability on a non-standard or industry approved repair. I have seen a frozen block on a boat welded up and run fine afterwards. Ive repaired motorcycle radiators "At The Race Track" and taken them out at 150 mph, and trusted them to hold together. These repairs are viable under the right conditions. My boats exhaust and risers was corroded to the point it was unrepairable and not worth the risk to even try. I sure would like to know why its not a viable option to resurface the points between the riser and manifold if all there is, is a small leak? Why not pull, in salt, every 2-3 years and just have them surfaced to ensure a flat (non-corroded) surface?:confused:
 

cedarjunki

Chief Petty Officer
Joined
Aug 23, 2007
Messages
472
Re: 5.0 L Mercruiser engine froze. HELP!!

spent my life on the water or near it would not go offshore in alaska with cracked block or manifold, easier to get in trouble then back to land

not to be a total smartass here, but duh, neither would i !!

if its properly welded and repaired then its no longer cracked!!
 

xltier

Chief Petty Officer
Joined
May 20, 2004
Messages
636
Re: 5.0 L Mercruiser engine froze. HELP!!

I agree with Bomar, No competent marine mechanic will EVER make such a repair. If he does, he is a HACK.

There is no way I would take my boat 15 miles offshore with a repair on an engine like that. I would not tow my boat to my favorite vacation destination and have my boat fail me either.

Reminds me of the saying "Penny wise...pound foolish"
and also applies to the one in my signature.

so what your saying is that its o.k to have giant arms and booms running with tens of thousands of lbs. pressure welded together on earth moving equipment and lasting for years but a crack in a boat manifold that has no pressure and only wants to buzz around the lake for a afternoon is wrong.?its easy to spend other peoples money i guess.i have a repair shop and know how to weld and my customers appreciate it when i can save them a few hundred.most people around here can barely afford the gas.i dont consider myself a hack.
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,581
Re: 5.0 L Mercruiser engine froze. HELP!!

so what your saying is that its o.k to have giant arms and booms running with tens of thousands of lbs. pressure welded together on earth moving equipment and lasting for years but a crack in a boat manifold that has no pressure and only wants to buzz around the lake for a afternoon is wrong.?its easy to spend other peoples money i guess.i have a repair shop and know how to weld and my customers appreciate it when i can save them a few hundred.most people around here can barely afford the gas.i dont consider myself a hack.
Earth moving equipment is not made out of cast iron. A cast iron exhaust manifold is subject to large temperature swings which preclude the ability to guarantee that a weld would hold. If its cracked on the outside, it can easily be cracked on the inside which if/when it fails would cost the owner even more money replacing the engine thereby saving the customer money in the long run by recommending a replacement. If i had a customer that came in and requested that type of repair, I would refuse because I wouldn't do "hack" repairs.

In the case of the OP, he is planning on selling this boat. I believe it is not ethical to do such a repair on a boat and sell it.
 

deves3000gt

Petty Officer 3rd Class
Joined
Mar 3, 2009
Messages
77
Re: 5.0 L Mercruiser engine froze. HELP!!

If a block is cracked and only appears to be on the out side (no water inthe oil) then cleaning up the crack and jb welding it/ welding is not hacking it is saving money. I have read many post on hear that second this as long as it is not closed cooling then there really is not much if any pressure. a craked mainifold if pressure tested and and found to only be cracked on the outside then wht is wrong with jb welding that also. i have done both to my boat. i dont have the $400 plus for a log style mainifold and the jb weld worked just fine.call me a hack but i dont feel bad about my repairs and feel pretty confident in them. its been two years now. imo
 

xltier

Chief Petty Officer
Joined
May 20, 2004
Messages
636
Re: 5.0 L Mercruiser engine froze. HELP!!

Earth moving equipment is not made out of cast iron. A cast iron exhaust manifold is subject to large temperature swings which preclude the ability to guarantee that a weld would hold. If its cracked on the outside, it can easily be cracked on the inside which if/when it fails would cost the owner even more money replacing the engine thereby saving the customer money in the long run by recommending a replacement. If i had a customer that came in and requested that type of repair, I would refuse because I wouldn't do "hack" repairs.

In the case of the OP, he is planning on selling this boat. I believe it is not ethical to do such a repair on a boat and sell it.

there is a mobile welder here that has weldimg rod made for cast.he will heat the metal to a certain tempurature first because of heat SWINGS.he once welded the threaded starter nubs back on a chev 350 motor that hit the cement wall at a race track here.saved a buddy of mine a new engine.1000`s of dollars.he has done the lifter valley of a few engine that were overheated.
he also has rods to weld forks back on a fork lift." modern technology"
 

ENSIGN

Lieutenant Junior Grade
Joined
Jun 21, 2009
Messages
1,179
Re: 5.0 L Mercruiser engine froze. HELP!!

YEAH,SOMEBODYS GOING TO GET SCREWED Make sure to include the iboats website info. with your sale
 

rfdfirecaptain

Petty Officer 1st Class
Joined
Aug 17, 2008
Messages
314
Re: 5.0 L Mercruiser engine froze. HELP!!

I'm in the same sad shape as the original poster of this thread except I have a Volvo 7.4 liter (454 GM). I too have considered the same repair options, but I'm thinking I would like to go back with a reman for more horsepower and torque. From what I'm reading that would save me fuel in the long run and well, while I'm doing engine work I may as well go back with something that I want. Right?

FYI... So far the best pricing I've found with the best guarantee is from usengine. The best information/customer service/advice I've gotten has been from a guy named J.K. at 1-800-RUNSNEW. I think they are in Maine.

Still weighing my options and keeping an eye on this thread. Lets us all know what you choose to do.
 

craze1cars

Lieutenant Commander
Joined
Dec 26, 2004
Messages
1,822
Re: 5.0 L Mercruiser engine froze. HELP!!

In the case of the OP, he is planning on selling this boat. I believe it is not ethical to do such a repair on a boat and sell it.


In order for me to fully agree with this statment, it should end with "unless the repair is fully disclosed." In my mind, full disclosure would make the sale fully ethical.

I do very much agree with the spirit of your comment, and I'm glad you brough it up. I want to make it clear that despite my endorsements of these repairs which I still maintain CAN WORK VERY WELL...I will never encourage anyone to do such a repair and try to hide it when selling the boat. The JB-Welded crack on my Volvo was done for MY benefit on MY boat. And I freely acknowledge THIS WAS and STILL IS A HACK REPAIR!! And the patches will be clearly pointed out to any potential buyer in the event that I decide to sell. But that's probably 10+ year away when the boat will have little value anyway.

Same for my Silverado cracked block repair I discussed earlier. (But which I did NOT consider a hack repair in any way.) I did it for MY BENEFIT to save money, and no other reason. And after 10 years/75,000 proven miles, I sold it. And despite being 100% hidden, proven, internal repair, the full history was still fully disclosed to the buyer. And would have been disclosed even if it was NOT my buddy who purchased it. I'd like to think that all sellers, including the one who started this thread would be equally honest, but I'm not ignorant and I do know better...

And back to the original poster, he's asking about a 94 Bayliner here...not much monetary value to begin with. I think some rigs are good candidates for what some may consider to be "hack repairs" and others are not. The original poster was asking for opinions, and he's certainly getting a variety!

And to those innocent folks who stumble across and read this thread now and in the future, it should whole-heartedly reinforce the often repeated concepts of "buyer beware" and "get a survey" and "have the boat fully checked by a competent mechanic" before investing in ANY used boat. Cracked blocks/risers/manifolds due to freeze damage are equally likely on 2010 boats with 40 hours as they are on 1988 boats with 1,000 hours...EVERYONE needs to make sure he's fully understanding what he's buying BEFORE he buys. If this thread has proven nothing else, I believe we can all agree that we now know that there are a LOT of hacked boats out there which are running very very well...

Just because a boat runs great, does NOT mean it doesn't have a potentially serious and expensive problem covered up by repair methods that some find appropriate, yet others feel are questionable. I know mine runs showroom new and passes all mechanical tests with flying colors, and if I were a dishonest seller I could hide the patch with a bit of sandpaper and paint, then dump it off VERY EASILY as a non-cracked engine block to the average runabout buyer, and the buyer likely wouldn't know the difference until if/when the patch fails. But since I'm my own mechanic, it doesn't bother me one bit for MY boat...I had a choice of $6, 10 minute grey glob, or a $1,500 multiple-hour engine swap (with my own labor...probably $3,000+ if I weren't capable and I had to pay others to get my engine replaced). I chose the $6 option, and I'm awful glad I did. Original poster might choose the same, and I see no reason to discourage it one bit...

And to the guy who said something about Alaska...Would I be willing to take my Volvo out on the open sea in Alaska? Hell no! LOL. At least not without a backup engine with me! But I'll gladly take it out to the 3,000 acre high-traffic inland lake that my boat will probably never leave. And I'll bring an oar, an anchor, an orange flag, and a few extra beers to pass the time just in case my repair fails me someday...and my life will NOT be at risk in any way...
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,581
Re: 5.0 L Mercruiser engine froze. HELP!!

Would I be willing to take my Volvo out on the open sea in Alaska? Hell no! LOL. At least not without a backup engine with me! But I'll gladly take it out to the 3,000 acre high-traffic inland lake that my boat will probably never leave.
You basically proved my point with these two statements. Obviously you can't completely trust the repair.
 

cedarjunki

Chief Petty Officer
Joined
Aug 23, 2007
Messages
472
Re: 5.0 L Mercruiser engine froze. HELP!!

with jb weld i might be a bit weary too.... ive seen it fail and then ive seen it still holding a repair..all depends on the repair...

but....what is wrong with properly welding a repair??
i understand its cast, but done properly, its weldable.

if you dont trust the welds then you shouldnt be towing your boat or driving a vehicle!
 

proshadetree

Lieutenant Commander
Joined
Jul 19, 2008
Messages
1,887
Re: 5.0 L Mercruiser engine froze. HELP!!

Cast can be welded Ive done it. I do trust it. I will take my old baylinner as far out as anyone with a comparable boat will. I did my repair I was shown how to weld cast by my father who has welded car and equipment parts for years. As a professional forklift tech I have welded several engines for customers. Will my company warranty such work? No they will not but customers love to save money. Dont think for a minute there are not many boats with welded blocks or exhaust. A reputable shop will not risk their standing with a weld. We don't build build carburetors or starters due to the cost per hour involved kills any money saved. We as a company will not weld load supporting parts of a lift because of liability. Let anyone weld a fork and OSHA will have a field day. I would not weld a part on a boat I knew was for sale. If I ever sell mine the buyer will know the manifolds were welded. If I had bought a repaired boat at the same price as a good one me and seller would have a good talk. Let you conscience be your guide.
 

craze1cars

Lieutenant Commander
Joined
Dec 26, 2004
Messages
1,822
Re: 5.0 L Mercruiser engine froze. HELP!!

You basically proved my point with these two statements. Obviously you can't completely trust the repair.


X3!!

LOL!!! You guys are killing me! And you are clearly confusing my two separate repairs. Of COURSE I don't completely trust the JB-Weld repair on my Volvo!! It's a huge hack and I admit it!! It'll probably leak water again someday, or maybe even fall off in a huge chunk and start pumping lake water into my bilge! And then I'll limp or tow it home, and it will have to be cleaned up and re-JB-welded, and then it will soldier on for a few more years after that...I'll be keeping an eye on the patches, and I WON'T be cruising off-shore Alaska with it!

But let me as clear as possible: I fully trusted, and I STILL fully trust, the professionally welded cracks in the cast block of my Silverado...and I'm guessing at it's current mileage, but I'd conservatively guestimate that it has been proven probably for close to 150,000 miles of trailer towing by now, and I know for a fact it still runs strong, and has not been opened since I rebuilt it. And those cracks were INTERNAL to the engine...where forces and stresses are at the highest.

I'd absolutely do it again and I'd recommend it to to others. And IF my Volvo block was professionally welded and/or stitched INSTEAD OF JB-WELDED, I would trust it as fully as any other non-repaired block. Even offshore Alaska!!

We disagree. That's pretty clear to you, I, and everyone else reading this. I respect that fact, and I respect both of you. It is senseless to keep going in circles on the same topic, so I will permanantly bow out of the conversation now...

Was good chatting with you.
 

proshadetree

Lieutenant Commander
Joined
Jul 19, 2008
Messages
1,887
Re: 5.0 L Mercruiser engine froze. HELP!!

I know of a 1968 LTD that had the radiator jb welded in the late 80s Its still in there and holding coolant. I dont drive in 15 miles off shore though. It would surely sink.
 

jack gardner

Seaman Apprentice
Joined
Aug 4, 2008
Messages
40
Re: 5.0 L Mercruiser engine froze. HELP!!

enough said .im an old school mec anic very old iv welded generators locks boats . naval .the nautalis . after its under north pole voyage . a good wed is stronger than cast .altenators can b overhauled . starters also .antything built can b fixed. but todays generation has been schooled to peplace with new . filling the world with scrap .but the ceo s are makin millions while we pay for new . just a rant sorry .if u want anything fixed iv done it or know how to do it so just ask been there done that .jack
 
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