Maybe you’ve gotten the news that your vehicle has a leaking rear main seal. Or perhaps you’ve started to notice oil dripping from the back of your oil pan and have wondered if you may have a rear main seal leak. No mater why you’re asking “How bad is a rear main seal leak”, the answer unfortunately is, it’s bad.
A leaking rear main seal leak can cause a lot of problems with your vehicle. The rear main seal is the seal that goes around your crankshaft at the rear of the engine. The crankshaft in your engine is held to the bottom of your engine block using main caps at each of the bearings. The oil pan is then bolted on over that, and a seal has to be placed over the crankshaft in between the block and the oil pan. This seal helps keep dust and dirt out of your engine and helps hold the oil inside the oil pan.
The reason a rear main seal leak can be so dangerous is due to the nature of the seal. The inside of your rear main seal is in contact with your crankshaft as it is spinning around thousands of times every minute. This seal is also right next to one of the main bearings in your engine which needs to be constantly lubricated by oil. The constant bath of oil combined with the spinning motion of the crankshaft will cause a rear main seal leak to allow a significant amount of oil to leak from your engine as its running. The gaskets in your engine can also cause leaks, but since there is no relative motion there, the leaks or often slow and more of a weeping or seeping than a drip or stream.
Also, once your rear main seal starts to fail, the rotation of your crank shaft can cause the problem to go from bad to worse extremely quickly. Rear main seals usually start to leak due to a worn surface or a small crack and the constant stress of rubbing on the spinning crank shaft can make worn surfaces or cracks get much worse very quickly.
A rear main seal leak can cause problems for your engine quickly because it can allow such a significant amount of oil to leak out very quickly. Most engine oil leaks will lower your over level to a dangerous point over a matter of weeks or even months. A rear main seal leak, on the other hand can cause your engine oil level to drop to dangerous levels in a matter of minutes, or perhaps even more quickly. Your vehicle is equipped with a low oil pressure light which can help alert you to a problem, but if your engine has low oil pressure it may already be too late and damage already be done.
A low oil level in your engine is one of the quickest ways to cause permanent engine damage. A low oil level will uncover your oil pump pick up screen causing oil to stop flowing through your motor leaving your cam shaft, bearings, and valves to move without lubrication. Also, a low oil level means your crank shaft is no longer splashing in the oil which helps cool and lubricate your main bearings, rods and piston rings. Even at normal driving speeds this lack of oil can cause permanent damage to happen in a mater of seconds.
If you’ve discovered a rear main seal leak in your vehicle, seal the leak today before it’s too late. Head to your local auto parts stores and pick up BlueDevil Rear Main Sealer. Simply add BlueDevil Rear Main Sealer to your vehicle’s engine oil and your rear main seal leak will be stopped as your drive your vehicle. You can pick up BlueDevil Rear Main Sealer at any of our partnering local auto parts stores like:
- Advance Auto Parts
- Bennett Auto Supply
- CarQuest Auto parts
- NAPA Auto Parts
- O’Reilly Auto Parts
- Pep Boys
- Fast Track
- Bumper to Bumper Auto Parts Specialists
- S&E Quick Lube Distributer
- DYK Automotive
You can also purchase BlueDevil Rear Main Sealer Directly from BlueDevil’s website here: Rear Main Sealer
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