Two problems related to engine oil leaking have been reported for the 2005 Chevrolet Monte Carlo. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Chevrolet Monte Carlo based on all problems reported for the 2005 Monte Carlo.
My engine (v6 3. 8l 3800 series) is leaking oil on the engine. My mechanic told me this yesterday (11/2/16) when he replaced the plastic elbows as I had antifreeze leaking from them. He said the 3. 8 l engine has a recall for this, oil leaking from the valve cover gaskets and said Chevrolet has a recall to replace them. I do remember seeing this recall online somewhere, but have not seen it while searching the last two days. My mechanic old me it will cause a fire. I have 87771 miles on my car. I have to add a quart of oil in between oil changes. I have had to do this since I purchased the car 6/2008. The car has been leaking oil for awhile now.
I have been the sole owner of this 2005 Monte Carlo. I had an oil leak and the chevy dealer ran a dye test to see where the leak was coming from. The test show it was the rear main seal that was bad. I have taken my car in on all scheduled oil changes, running mobil 1 synthetic (recommended) and having all scheduled maintenance done. I do not feel a rear main seal should be going out on this low mileage vehicle (under 50,000 miles). I feel this is a defect. I called the Chevrolet customer care line, and they were no help.