Common questions

Is the nose seal on a Lycoming a crankshaft seal?

Is the nose seal on a Lycoming a crankshaft seal?

The latest revision of Lycoming Service Instruction No. 1324 calls it a crankshaft oil seal. Although almost everyone knows exactly what you are talking about when the term nose seal is used, correct terminology can be important.

How do you remove a nose seal on a Lycoming car?

First, remove the old nose seal, and clean the work area. Again, push the crankshaft to the rear of the engine. Insert a .002 inch feeler gauge about 3/16-inch wide between the oil slinger on the crankshaft and the crankcase.

What causes an oil seal to leak on a Lycoming car?

The experienced Field Service Engineers at Lycoming indicate that a leaking crankshaft oil seal is frequently caused by a restricted breather or an oil-slinger clearance that is too tight. The leak might also be caused by a propeller defect which places an abnormal side load on the crankshaft oil seal.

Why is my nose seal leaking after installation?

Should this seal leak immediately after installation, it is possible that the seal was damaged during the installation process, but a poor fit between the crankcase and seal or the crankshaft and seal could also be responsible for the leak.

How do you replace the rear main seal?

Your vehicle’s flywheel or flexplate is then bolted onto the crankshaft flange sandwiching your rear main seal between your engine and transmission. To replace the seal, either the engine or transmission will have to be removed. Once one of those is removed the oil pan also has to come out so it gets to be an expensive job.

How can I tell if I have a rear main seal leak?

The only way to be sure you’ve got a rear main seal leak is to clean your engine thoroughly, then run your engine and check for the drip that looks like it’s coming out of your transmission bell housing. If your transmission has an inspection plate you can also open that up and check for engine oil on the back of your flywheel or flexplate.

Can a rear main seal leak cause oil to drip?

Now that you know how serious a rear main seal leak can be, it’s important to be able to spot one. If you’ve got a rear main seal leak you will have oil dripping off either your engine oil pan or the front of your transmission called the bell housing. The problem is other leaks can cause oil to drip from this location as well.

Where can I buy bluedevil rear main sealer?

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. Pick up BlueDevil Rear Main Sealer today at your favorite local auto parts store like:

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Ruth Doyle