How to Repair Engine Block Deformation Caused by Overheating?
2 Answers
If the engine block is deformed, it can only be replaced. The following introduces the repair method for engine block cracks: 1. Use coarse sandpaper to remove rust around the crack on the engine block. When sanding to a certain extent, the end of the crack can be located. 2. Then, directly perform welding with a patch plate. However, be cautious of warping at the welded area. If warping occurs, immediately hammer the welded area while it's still hot to prevent residual slag. 3. After patching, place an asbestos gasket between the patch plate and the engine block (or cylinder head), and apply a layer of lubricating oil on both sides.
I remember repairing similar cars, and engine overheating leading to cylinder block deformation is quite common, usually caused by cooling system failures such as a broken water pump, leaking radiator, or non-functioning fan. During inspection, use a straightedge to measure the flatness of the cylinder block. If the deformation is minor, it can be repaired by boring the cylinder under professional equipment; if severe, the entire cylinder block or engine must be replaced. This requires precise tools and techniques, so never attempt to fix it yourself. Regular maintenance is essential—check coolant levels and the radiator periodically. If the dashboard temperature warning light comes on while driving, stop the car immediately. Otherwise, cylinder block deformation can also damage the pistons and cylinder walls, making repairs more expensive and troublesome.
