September 2023 Archives - UnderhoodService
Why Do Timing Chains Stretch?

As the timing chain wears, it can change the timing of the camshaft and crankshaft.

Why Is NHTSA Involved With RTR?

A closer look into NHTSA’s involvement with RTR.

Do OEM Service Bays Offer Opposition or opportunity?

With great power, of course, comes great responsibility.

The September Issue Is Available To Download, Read

Each issue includes technical content from Underhood Service and other ShopOwner channels.

Acura Turbo Engine Service

It is important to check the operation of the solenoids that control vacuum to the actuators.

Subaru EJ25 Head Gasket Problems

Most of the EJ head gasket failures occur around the 100,000-mile mark and start as a slow oil or coolant leak.