The 3.7L V6 and 4.7L V8 in very cold climates (below freezing temperatures) moisture can collect in the Positive Crankcase Ventilation (PCV) system and freeze. This will cause various drivability problems and there are revised PCV system components to repair this concern.
Car Problem Reports
Dodge Ram 1500 Moisture may collect in PCV system and freeze in cold climates
Dodge Ram 1500 Problem
Exhaust & Emissions Affected: 4.7L V8
Visitor, 2005 Dodge Ram 1500, 60,000 mi
Looked like mayonaise inside oil filler cap. Was afraid it drain into motor oil!! Changed pcv valve poured 5oz. Seafoam down pcv tube to clean. Poured 6oz. seafoam in motor oil. Drove the truck to work change oil and filter. Will definetly watch this a lot closer!! Poor design for sure. Dodge has been around long enough to know better. I geuss?
Visitor, 2005 Dodge Ram 1500
I live in wisconsin and have had it happen two winters in a row now when it gets belowe zero. oil sprays all out the back of the vehicale what a mess. dealership says all that can be done is change out the pcv valve more often ?????