Bad Diesel Engine Oil Leak at Front Crank Seal

We have a special kit with complete instructions so you can fix it yourself.

This can be one of the worst oil leaks on an older 1969 to 1985 diesel. Let's face it. The engines are very reliable but seals and gaskets do wear out after 200,000 + miles. When that front crank seal starts leaking it will only get worse. Putting off fixing it is not a good option.

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Problem & Solution

Common among these chassis:


We have the parts, tools and instructions to help you fix that nasty leak. Watch Kent's free video as he explains more about what to expect when tackling this job. See recommended products for more information on our specialty products for this repair: