With a damaged seal, your crankshaft is exposed to unwanted leaks. Keeping the rear main seal in its top form is a must to keep the oil inside the engine as the crankshaft rotates. Need a replacement now? Check out this guide to make shopping for parts fast and hassle-free.
What You Should Do
Make sure you know the specs of your vehicle before shopping: year, make, and model; engine and crankshaft design; and its type of rear main seal. You should also know the rear main seal design: does your crankshaft require one-piece or two-piece seals. Refer to your owner's manual for detailed information.
- Perform a little research about the rear main seal so you can make a guided decision.
Rear Main Seal Types:
- Rope Seal- If you have a vintage auto, it is likely that you'll be getting this seal type. Rope seals are commonly used in old engines. Similar to cords, these seals keep pressure within the engine. However, these get easily soaked in oil so they are prone to early wear and tear.
- Split Seal- This type of seal is common in modern vehicles. It is an improved version of the rope seal; it is more durable because it is made of rubber and its design protects more area.
- One-piece Seal- The toughest seal among the three types, a one-piece seal provides the tightest coverage. It is usually used in heavy-duty engine blocks and racing applications. Unlike the rope and split seals, one-piece seals require a specially machined crankshaft and replacement of the stock crankshaft.
What You Shouldn't Do
- Don't base your choice on price alone.
Rear main seals are relatively cheap; you can get seals for as low as $15. However, it is important to take note of the reason why they are cheap (i.e. type, material, and added features) before buying.
For example: Let's take a look at Felpro's line of products.
- Seals that cost around $15 are rope seals; they are cheaper because of their design and material.
- Felpro also offers seals that are priced at $20; these seals are a little more expensive because of their material and type.
- High-end seals that cost more than $20 are usually crafted from Viton; these are more resistant to heat making them perfect for racing applications and heavy-duty vehicles.
The added features and different material types affect the price of the seals. Instead of focusing on the number, check out the added features to see if it's worth spending on.