Valve Archives - UnderhoodService
VIDEO: Oil Filter Bypass Valves And Filter Capacity

When a system is in bypass, contaminants are not being filtered out of the oil. This video is sponsored by FRAM.

VIDEO: Why Do Oil Filters Have Anti-Drain Back Valves?

For spin-on filters, it’s a rubber-like membrane on the inner side of the can. This video is sponsored by FRAM.

Elgin PRO-STOCK Expands Ford 5.0L Coyote Engine Offering

These naturally aspirated, DOHC engines are found in Mustang GT, Mustang Boss 302 and F150 models.

JEGS Hydraulic Valve Lifter Removal Tool

Save time and frustration with stuck lifters.

VIDEO: The Importance Of Valve Stem Seals

Doug Kaufman explains what it means when a valve stem seal is damaged. Sponsored by MAHLE.

VIDEO: Thermostats And Oil Sludging

Andrew Markel explains how improper temperature control in the engine can lead to oil sludging in the valvetrain. Sponsored by MAHLE.

thermostats-oil-sludging-video
Diagnosing V8 Engine Leaks

You already know that there are plenty of BMWs with V8 engines on the road today, but you might be surprised that they can have issues with oil leaks. Inevitably, some of these will find their way to your shop in need of service, so here are some common items to be aware of when they arrive at your shop for repairs. In this article, I will focus on valve covers, the front upper timing chain covers and the alternator bracket gasket.

bmw v8 engine oil leaks
Valves & Seats: There’s More Than Meets The Eye

The valves and seats in an internal combustion engine play a central role in engine breathing, compression, performance and longevity. It doesn’t matter if an engine has two, three, four or even five valves per cylinder or if the engine is gas or diesel because the valves all do the same thing: they open and close to allow air into the cylinders and exhaust to exit the cylinders.