The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

madmatt54 · 08-21-2008, 08:40 PM

One thing to add. We always pull the valve cover and look at the rockers on the #1 cylinder. At TDC both rockers should be up so both valves are closed. You should be able to spin the pushrods. If one valve or the other is opened, either you are 180* off, or your timing mark has moved.

08-21-2008, 08:40 PM	#6
madmatt54 Registered User Join Date: Jul 2008 Location: Lufkin, Texas Posts: 12	Re: Question regarding T.D.C. One thing to add. We always pull the valve cover and look at the rockers on the #1 cylinder. At TDC both rockers should be up so both valves are closed. You should be able to spin the pushrods. If one valve or the other is opened, either you are 180* off, or your timing mark has moved.