3.0 Mercruiser engine block crack fix with J-B weld. Will it work?! (Check the follow up video)
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- Опубліковано 12 жов 2024
- How to fix a Mercruiser engine block crack with J-B weld.
3.0 Mercruiser engine block crack fix with J-B weld. Will it work?! follow up video link:
• 3.0 Mercruiser engine ...
forgot to pull my freeze plugs on my boat and cracked my block on my boat. did the same thing but i dilled out holes on each side of the crack and "V" out the crack to give a good bond. mine lasted the life of the boat no problem. great product
I have OMC Cobra 3.0 and i have the same problem. The difference is that the first owner soldered it with inox soldering. Tomorrow i’ll try with friend of me that have the same epoxy . Hope it will help.
I think you need to tighten the bolts into those holes and cut them and smoothed with the angle grinder to the block level so its make the more strength
I think we do. We gonna do it before the season. Thank you so much
Hey thanks for the video. I appreciate your work. Looks like a year or so later how's it holding up?
So far so great.
Thanks for watching please subscribe and share with family and friends
I fixed mine the same way and it lasted 7 years
Thank you so much for sharing your experience with us, that give us a lot of hope of our method. Hopefully ours will last as long as yours.
If it's leaking out the block will it over heat engine if it's alot coming out or water just get in boat ???
İs it still working?
@@LaidbackTahoe the raw water pump sucks water into the motor, so it shouldnt over heat, it will just dump water into the boat, since the water supply is the lake and never ending
I’ve got the same issue on my merc 228. Did you drill all the way through the block for the holes at the end of the crack? Thanks, hope the repair is holding up for you!
They did not!
How deep do you drill the holes do you drill all the way threw
Not that deep I would say about 2mm
Sorry yes all the way. That’s what we did.
Great video and detailed. I have the same problem and will test it
Good luck
If you have any questions don’t hesitate
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Thank you
I going fix my block is also Mercruiser 3.0, How is going your boat after you fixed?
I hope is working
You put just 1 code JB no 2?
Thank you for this video!👍
It’s working great so far. And yes only 1
the Alternator seems to be loose or the fixing position is worn, brazing could have been a more permanent job, good luck with it.
as for me i was looking for JB weld rubber to metal fix .
Thank you. We have not yet tested it properly. In couple weeks we are planing to do so. We are planing to test everything in the water. We will share that on a video. Please follow next video. If you have any comments please share it with us. We are all learning. Thank you for your comment. Thanks again.
That works for a water line crack. Would it work for an oil line crack?
I think all depend on the pressure. In our case no pressure
@@pharaohssquad8078 that's what I thought. No welder is willing to welder cast iron and I don't trust these jb weld methods on oil line cracks. I'm F***ed
No! If you have water in your oil, JB weld won't fix it. Time for a new block (yes, I know I'm replying to an old comment)
I have a cracked 383 block in my 59 Chrysler it's got really small cracks would this work on it?
I don’t think so. This engine cooling not under pressure, but car engine does but u can try. I have seen it done couple times and lasted
@@pharaohssquad8078 I'm trying to get rid of the car but wanted to see if there might be a way to fix the block it's it's cracked in the piston bores and outside block small thin cracks didn't think it was fixable
For car engines there are couple videos on UA-cam showing the difference between JB weld and welding in couple different ways. I remember watching them. Those might help you
Please could you update after trying it in the water when driving for some time?
We already have a follow up video. Also so far we have been in the water couple times but we will update. Thank you
Here is the link for the follow-up video when we tested in water: ua-cam.com/video/jaZrtOF7oC8/v-deo.html
I've seen them fixed with silicone. JB weld will hold. there isnt much pressure in a boats cooling sytem since it is an open system. taking and leaving the thermostat out will also help to keep less pressure in the system.
@@catfisher420can leaving the thermostat out cause any issues?
@@michaelrdaggett5717 the only issue it would cause is the engine would always run colder than designed.
You should use lock stich screws mutch better repair
How much does that exact thing cost to do?
The drill bits and JB weld together about $20. I sure it was less but just going higher.
Your time it depends on how long would it take to finish it, but honestly the enjoyment and the thrill of fixing yourself is priceless.
@@pharaohssquad8078
For a company to do it for me
I believe there are no boat shops will do such work.
They will recommend changing the engine.
I got a block that’s cracked as well and needs exactly the same repair done but needs someone who knows exactly what they are doing to get the job done
If you have anyone you know kind handy with tools, have them watch the video. I hope will be easy experience. If you have any question through your process please don’t hesitate to send your question. Thank you for watching the video, and I hope it will be a good guid to your project and get your problem fixed.
Do not use JB Weld. Or you will be repairing again soon.
@@jamesdeeton4299 then what do you use?
@@jamesdeeton4299Reasons? Alternatives?
What type of jb weld did you use?
The original
We always trust it and never failed us. It can handle tough conditions and high temp. If it ever failed with us, we will let everybody know. But so far it’s the best
Jesus, full throttle start.. Pump it, lock it with the choke open, then start it
Fiberglass Jelly would work much better than JB Weld. JB weld will break down with water and heat on metal. Welding it would be the best way to fix it.
Thank you. We did it this way to give the JB weld a try.
it will not break down! and the JB will hold up to 500 degrees!
Don't run your engine with the lower unit raised that high. It is very bad on the U joints.
Thank you for the tip. As we mentioned we are not professionals so we can use all the tips 😀
time will tell
I honestly hope that's not a customers boat motor your doing that too!!!! And if so I really hope they know you fixed it that way and hopefully didn't charge them for a whole new block and etc. Because if that was my boat and you did some shady shit ass work like that and charged me alot of money I would be furious.
We only work on our vehicles.
Our channel is about DIY.
We offer ideas, and we test them. if you like to try them, it’s on your own risk.
We know eventually have to change the engine, but once again it was an idea and we put it to the test. (So far it’s working)
But thanks for your concern, and your comment.
It won’t hold
It has been for over 30 running hours so far. We will let I know what is going on.
It has!
Mines been jb welded nearly 10 years now. Hasnt leaked a drop. Very little water pressure on a boat cooling system unlike a car
I assume this is an American engine. Why bother fixing it, there would be millions of them made
Mercruiser 3.0 is a industrial engine made by gm not put in cars so blocks are harder to find
There is also a shortage of marine blocks thanks to Texas deep freeze that caught a lot of boats unwinterized.
So buy a engine! and don't spend 5 bucks to fix it? OK!
This motor is known as the Iron Duke, old school motor and built to last