Rotate Engine for Valve Adjustment 1

Rate: (0 Ratings)

Part of the video series: Car Maintenance: Valve Adjustment

Summary: During a valve adjustment, a mechanic must rotate the crank shaft to align each cylinder in view. Watch an automotive service excellence (ASE) certified master mechanic rotate the engine cylinders in this free video on car maintenance.

Views:: 342

Presenter

By Mark Blocker
eHow Presenter

Mark Blocker is a semi-retired ASE-certified master mechanic with more than 20 years of automotive experience. He has been a state-certified emissions specialist for more than 15 years...read more

URL:

Embed:

Video Transcript

"In this segment we're going to cover rotating the engine 180 degrees and that takes us from cylinder number one to top dead center on cylinder number three. So I'm going to insert my extension and ratchet and just slowly just rotated the engine over a 180 degrees and remembering or keeping in mind. That the crank shaft turns at twice the rate of the cam shaft. So if I'm rotating a cam shaft a 180 degrees the upper cam sprockets will only rotate 90 degrees and I'm having a little difficulty getting past compression stroke. There it goes! Once again if that's a little difficult for you. You can remove the spark plugs and the engine won't develop any compression. Makes it easier to turn over. Now the position if the up marks to verify your on cylinder number three. Should be on the exhaust side at this time. With your center marks lined up evenly and that will conclude rotating the engine 180 degrees. Please watch our next segment on adjusting the intake valves. Cylinder number three part one."