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.Google+
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
Average Mileage: 113,333 mi (60,000 mi - 215,000 mi)
Visitor, 2002 Dodge Ram 1500
I was checking my fluids this past weekend and to my surprise the "mayonnaise" that filled the oil fill tube and cap gave me quite a shock. My heart sank simply because I have already replaced the engine in this truck once and don't see it being worth doing again. Hopefully the things that I have read here are the "simple" fix compared to another bad motor. I will definitely check into this situation. Thanks for the heads up.
Visitor, 2005 Dodge Ram 1500, 215,000 mi
I have lots of yellow pudding in my 4.7 L dodge ram oil cap and some foaming on the dip stick...
Only stalls on really cold mornings ( below 0'C Degrees ) at stop lights and surging idle freqently... I was worried about a head gasket being blown untill seeing this...will replace pcv next...i've been adding seafoam to crankcase since i noticed this problem.. plus i cleaned throttle body,iac, replaced tps so far..planning to check for vacuum leaks if pcv doesnt fix it.. ( Canada)347000km
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 ?????