A significant part of these on-road emissions used to come from the crankcase — up to 30%, according to a 1962 study — but thanks to changes in engine design, that's no longer true.

Q–I have a 1986 Chevrolet Silverado with the 305-CID and 4-barrel carb. It has 86,000 original miles, and I’ve always changed the oil at 3,000. The problem is that it is spitting oil into the ...

In addition, the low-level vacuum draws in fresh air to the crankcase from the crankcase breather. In 99% of normal driving conditions, this is how a properly functioning PCV system works.

The PCV breather needs to connect to the hose barb installed in the back of the intake manifold. See All 20 Photos To accomplish this, Jason used a combination of 3/8-inch stainless tubing and a ...

BMW Recalls 917,000 Vehicles Over PCV Valve Heater That May Short Circuit. Published: 9 Mar 2022, 17:18 UTC • By: ... Vehicles equipped with the N52 and N51 engines are called back, ...