Question about Vehicle Parts & Accessories
Thick black and lots of it
Sounds like an very bad oil leak. If there is so much that you can't readily determine where it comes from, first you need to shampoo the engine. This is a procedure I do not recommend a "back yard" mechanic do. On a 04 Colorado there are a tremendous amount of electrical systems that can be destroyed if it is not done properly. I suggest getting a licensed garage to do the engine shampoo then run the vehicle checking for the leak. Most licensed garages will also determine where the leak is coming from at no extra charge (just ask). You do not have to let the garage fix the leak if you do not want them to but you should make it clear to them first that you do not want anything fixed just the leak found. You can then proceed from there. I think there are "over the counter" engine cleaners that can be purchased and used if you are not willing to pay for a garage to do this for you but again I caution you with these products and damaging electrical components, follow the directions precisely.
Posted on Mar 24, 2014
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Posted on Jan 02, 2017
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