#Liquid glass repair cracked block crack#

BlueDevil Radiator and Block Sealer is a specially formulated sealing agent that you add to your vehicle’s cooling system. The best way to seal a cracked block is to use BlueDevil Radiator and Block Sealer. To determine if you have a blown head gasket, you can read our article about the symptoms of a blown head gasket.

#Liquid glass repair cracked block crack#

If you have an internal crack the symptoms can often be similar to that of a blown head gasket. If you have an external crack in your block that you can see, then the problem is easily identified. The problem in most cases is the same as with cold metal stitching in that the wide range of operating temperatures in your vehicle’s motor along with the thermal expansion of the metal cause most repairs to only last for a short time.īefore you attempt any repair on your cracked engine block, you want to be sure that is the problem you have. There have been a variety of other attempts at sealing cracked engine blocks like using cold welding products, 2 part epoxies or a variety of other patches and fixes. This process is also often prohibitively expensive and only used on very large or expensive motors such as heavy equipment, diesel engines or marine motors. The main difficulty with this process is that it does not work well on components that experience drastic temperature changes as the temperature change causes swelling and shrinking of the metal which will cause the metal stitching to tear and the crack to reopen. This process is similar to sewing two pieces of fabric together, except it is far more difficult with metal. The other common attempt at fixing a cracked block is called cold metal stitching. It is possible to weld cast iron using an arc welder and the proper welding rods, but that often can cause deformation to your engine block, or leave the welded area far more brittle and susceptible to further cracking. The main difficult is that you cannot simply weld an engine block since it is made from cast iron, not steel.

There are many who have attempted to repair cracked blocks.

Also, having a cracked block is one of those extreme cases where it may not be possible to salvage your current engine. Engine swaps can be extremely expensive and often not worth the investment in your current vehicle. Having a cracked engine block can feel like the end of your vehicle’s life.