Smokey Mountain Blues
A small number of owners of 2011-2014 Jeep Grand Cherokee vehicles equipped with the 5.7L engine built on or before Oct. 1, 2013, may experience blue smoke from the exhaust pipe when the engine is initially started after an extended cold soak and the vehicle has been parked facing uphill on a significant incline.
This condition is typically the result of oil pull-over on the rear cylinder walls. The revised oil pan incorporates an improved windage tray/oil scraper that helps to reduce this condition. An associated PCM software update incorporates a reduced engine vacuum feature that is enabled under these conditions which lessens the effect of oil pull-over. The wiTECH software level must be at release 14.01 or higher.
Use a scan tool (wiTECH) and verify that all engine systems are functioning as designed. If DTCs are present, record and repair as needed before reflashing.
REPAIR PROCEDURE
1. Replace the engine oil pan with revised P/N 68207352AA. If the vehicle is model year 2011, the repair is complete. If not a 2011 model, you must reprogram the PCM.
2. Install a battery charger and do not allow battery voltage to drop below 13.2 volts or above 13.5 volts. Reprogram the PCM with software 14.01 or later.
3. After reprogramming, clear any DTCs that may have set in other modules due to reprogramming.
Tags: Jeep, Jeep Grand Cherokee, smoke, exhaust, scan tool
Related items
-
Watchdog bans DPF deletion advert
Advertising Standards Authority rules that garages must clearly state the legal implications for... Read more -
Jeep is Not Cool
This bulletin applies to 2011 Jeep Wrangler vehicles equipped with a 2.8L engine and air conditioning, built between Jan. 4, 2011, and Jan. 7,... Read more -
Additives for diesel vehicles: Efficiency goldmine or reliability minefield?
Additives for diesel engines allow many diesel vehicles to keep pace with ever stricter emissions legislation, while also providing improved Diesel Particulate Filter (DPF)... Read more -
V-Motech solutions for meeting RDE regulations
Today more than ever the antipollution RDE regulations established by the environmental authorities are mandatory and hard to... Read more -
Don’t pimp your ride if you want to sell it – Glass’s
Retrofit add-ons like big bore exhausts, aftermarket alloys and tinted glass can put off potential used car buyers and destroy values, says Glass’s. Andy Cutler, forecast values editor, explained that these non-manufacturer options suggested that the previous owner was a boy racer and the car would have been driven... Read more
social