gtwickline
10.06.2021 18:36:22
Thanks [Xavier] for the tip. [links]
See full version: Jb weld cast iron engine block
Thanks [Xavier] for the tip. [links]
Sure you can do it and it might endure in a low compression engine, but not under tenrional stress. It may also lose adhesion with water/oil cycling
After attaching the JB Weld cylinder head to a lawnmower, [Project Farm] ran the lawnmower for about a minute. Is this a proof of concept? Yes. Did it work? Absolutely. Is it the ultimate test of JB Weld and the myth of the cracked engine block? Unfortunately, no. For that, someone will have to build a real engine entirely out of JB Weld. Until then, just check out the video below. [links]
However, as with anything mechanical that doesn’t have a foul-mouthed Canadian in it, arguments ensued. ‘This was not a true test of JB Weld repairing a cracked engine block’, claimed Internet commenters, ‘I won’t even watch the video because the idea alone is click bait.’
This experiment began by casting a single monolithic block of JB Weld that’s a bit larger than the cylinder head for a lawnmower. After curing, this JB Brick was surfaced on both sides with a belt sander. No, there was no vacuum chamber or any other techniques used by people who work with epoxies for a living. With the brick surfaced, the head gasket was used to place the bolt holes, the brick was tapped for a spark plug, and a bit of the inside was Dremeled out for the valves. [links]
Now, [Project Farm] is back at it. Is it possible to use JB Weld to cast an entire cylinder head for a lawnmower? It sure is. With a cast epoxy cylinder head, this engine will run for just long enough for a proof of concept.
Since the most common culprit of a cracked engine block is an issue in the cooling system, there are products that work to fill these cracks. These products are often introduced into the car’s cooling system. Over time, the chemicals in these products form a more permanent seal in the cracks. The issue here is that the products may not solve large cracks.
The engine block is the structure that supports or contains a variety of components that operate the engine. It contains the cylinders that are crucial in the generation of power. It also contains the crankcase which is important in housing the crankshaft. The crankshaft converts the linear (up-down) energy coming from the pistons in the engine cylinders into rotational energy. This delivers power to the wheels to get the vehicle moving.
Modern engine blocks do not crack in a spontaneous manner. There is often a trigger that may cause it to form microscopic cracks. Knowing the potential causes of a cracked engine block can help car owners institute measures that will prevent such problems. more
If you have ever experienced having a torn fabric, you know that you can stitch the two sections together. This is the same principle behind cold metal stitching. The difference, of course, is that you are not stitching fabric. You are “stitching” metal. The issue here is that it may not be effective in sections of the engine that are frequently exposed to drastic temperature changes. This can tear the metal stitching and reopen the crack. It is also very expensive.
Overpowering the engine can also lead to excessive heat-generation. Installing a turbocharger or a supercharger to an incompatible engine can also lead to overheating. Installing these devices produces more power than what the engine can handle. [links]
There are automotive problems that require very easy fixes. For example, if you have a cracked radiator hose, it is very easy to replace it with a new one. A blown fuse is also very easy to address with the insertion of a new fuse. Worn brake pads? Remove it and replace it with new brake pads. But if you are talking about a crack in your engine block, it would seem as if it’s already the end of the world. You know the very nature of your car’s engine. If there’s a crack, this automotive component loses its structural integrity. There is no question that fixing a cracked engine block is not easy. Its repairability is contingent on the severity, extent, and nature of the crack.
Junior Member Join Date Dec 2009 Location Croydon, PA Posts 99
rust 65 Impala SS Convertible more
I have a Miller Spool gun for mig welding. I have read a few cases where people have even epoxied patches in with success. [links]
The hole is 1"x2". You can see it is in a window only and nothing too involved. I have welded aluminum before. I was figuring on getting a piece of flat stock 1/4" and making a patch to cover the hole then welding the perimeter of the patch to the block. I can weld it from both sides, since I will probably take the complete engine apart. [links]
This is a discussion on Welding Aluminum Block within the General Help forums, part of the LSx Technical Help Section category; Hello, I recently bought a LS1 with a rod through the block. The engine was running and was shut off .
Keeping this in consideration, what is the best glue for cast iron? more
Will JB Weld work on cast aluminum? [links]
Choose a cold-weld type of steel-reinforced epoxy -- commonly known as liquid weld -- for your bonding adhesive. This type of adhesive typically includes two separate tubes: a hardener and a resin. [links]
Frequently, broken cast iron parts are repaired by welding. Broken cast iron parts are not unusual, given the brittle nature of most cast iron. When castings are made, molten iron is poured into a mold and allowed to slowly cool. When this high carbon material is allowed to cool slowly, crack free castings can be made.