DIY Crankshaft Repair Tips

When you have problems that require crankshaft repair, you can have some significant work ahead of you. The power generated from the crankshaft turning helps run the engine. Without a working crankshaft, your car won’t go. Crankshaft repair isn’t for the novice mechanic. Removing the crankshaft is a difficult, involved process and any crankshaft repair even more so. Here are a few tips to make the task easier.


One of the most common problems needing crankshaft repair can happen when something goes wrong with the bearings. This can occur because of rust or there might be unmatched torquing in the crankshaft. Where rust is the cause of the problem, the crankshaft repair is relatively simple. You can polish the bearings to remove the rust. When that rust is so bad that it’s corrosion, you’ll need to replace the bearings. When you do that, replace all of them.

You might also find that the problem is due to clogging around the bearings. This can occur over time. It’s an accumulation of dirt and debris that can build up to the point that the bearings will no longer function. If this happens, you’ll need to give the surface a very thorough cleaning before replacing the bearings.

Dry Surface

If the crankshaft isn’t properly lubricated, it’s not going to rotate properly since it will be too dry. Before you lubricate the crankshaft, you’ll need to clean it. Take care with this, as you’ll need to remove all the debris that’s accumulated on the crankshaft. Only when you’ve done that will any lubrication be effective.

Crankshaft Holes

The holes in the crankshaft are there for a reason. They’re important to the movement of the crankshaft. They need to be leveled. If you think there’s a problem with the holes not being level, you can undertake this crankshaft repair quite easily. Use a bar to check the holes. Where there’s no proper justification, use your drill to make or enlarge the holes, according to your service manual.


Heat is a constant problem for an engine, and particularly for a crankshaft, especially on long drives. Although it’s not so much a crankshaft repair as a preventative measure to ensure you don’t break down on a trip, make sure that your crankshaft is properly lubricated. Your service manual will tell you where and how to lubricate it.


It’s vital that the connections between the crankshaft and other components is perfect. Where this isn’t the case, the crankshaft won’t work properly. In turn, that will affect the entire engine. The crankshaft repair here is relatively simple. Remove the bolts, reseat the crankshaft against the other component and replace the bolts at the correct pressure.

New Crankshaft

In most cases, it will be easier to put in a new crankshaft than to try to undertake most types of crankshaft repair. There will be less work than making a crankshaft repair, and the results will be better and generally last longer. Note, however, that replacing the crankshaft involves rebuilding the entire engine, which is a huge job.