Buy Now | Log In | ALLDATA Corporate Site | AutoZone.com
Back To Home Page
Log In To Your Subscription
Go To ALLDATA Back Home
Buy A Subscription! Back Home About ALLDATA Information View Sample Vehicles Read Testimonials View Factory Service Bulletins and Recall Titles Contact Us
Dowload Our Navigation Chart
February 2015: New vehicles added including 2014 GM.
• View New Vehicles
October 2014: Release of 2013 along with initial 2014 Vehicles
• View Vehicles
View All News and Updates:
• Go To News
Tech Tips
  Read All Tech Tips

ALLDATA Tech Articles Are Updated Weekly
• View All Tech Articles

  Dodge Durango: Brake Pulsation Problems In Paul's Durango
• Read Dodge Article
 
Fixing A Smelly Audi Audi Tech Tip: A4 begins to Smell caused by a Faulty Hose Composition
• Read Audi Article
Why Do You Need To Change Your Timing Belt? Why Replace Your Timing Belt
• Read Belt Article
Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
Home >> Featured Tech Articles >> Go Back
   
  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
If you have any questions, please feel free to email us.
 
 

Miscellaneous
Acura
Audi
Buick
Cadillac
Chevy
Chrysler

Dodge/Plymouth
Ford
GMC
Geo
Hyundai
Honda
Isuzu

Jeep
Lexus
Lincoln - Mercury
Mazda
Mercedes
Mitsubishi
Nissan
Oldsmobile
Pontiac
Saturn
Subaru
Toyota
Volkswagen
 
   
  Jim Grant's Tech Tips

93 Lincoln Towncar, Smokes When Idling
Q: My 93 Lincoln Towncar smokes after it sits at idle, but only after it warms up. When it is cold (engine) it doesn't smoke. As soon as the water heats a small amount and the temperature switch senses this the check engine light comes on and the smoking begins. Whenever you sit at a light and then accelerate there is a large cloud of blue smoke which comes from the tailpipe. The engine uses about 2 quarts of oil every 400 miles. I tried reading the engine codes and the closest I can come up with is the EGR system. This problem just started a few months ago and I'm stumped. The last time I had a problem was poor running and a thermactor code. It cost me $400.00 for a new mass air flow sensor and a cleaning( I think I got the cleaning ) of the EGR system. Any help would be appreciated....Rick

A: Something isnt adding up here. First, 2 quarts of oil every 400 miles is a major oil consumption problem! Its unlikely any computer codes are going to give you an answer to that. I would not recommend spending much money on that vehicle until you know why the engine uses so much oil. The way you describe the problem brings back some memories of problems wed see with older vehicles. Of course I was very very young at that time.

Heres what would happen. Because of poor oil quality, lack of proper maintenance and/or driving habits the oil drain back passages in the cylinder heads would plug up with deposits. This condition would cause oil to become trapped in the valve covers of the engine. As a vehicle is driven, oil is pumped up to the top of the engine to lubricate the push rods and rocker arms (in your application) that operate the valves. This oil is suppose to drain back down into the engine. When oil cannot drain back, it collects at the top of the engine in the valve covers. Once the oil reaches a high enough level the valve seals are overpowered with oil and eventually the PCV valve, which is designed to remove vapors, would have liquid (oil) available. Needless to say this condition would cause oil consumption to jump resulting in a marked abundance of blue smoke out the exhaust after a vehicle had been run a short time. This condition would also raise havoc with the vehicle emission controls, which could cause the computer to send out a desperate plead for help (check engine light on).

An easy way to check for this possibility is by inspecting the oil level in the morning after the engine has set overnight. Then drive the vehicle until it starts smoking good. Shut the engine off and check the oil level. If the oil level has dropped in that short of time then it is very likely that oil is trapped in the valve covers of the engine. The fix is removing the valve covers and cleaning the drains.

 
     
Have any Questions About ALLDATAdiy.com? Please Email Us
Buy Now | Log In | About | Sample Vehicles | Testimonials | Join Affiliate Program