The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - As exhaust valve is 3/4 of the way from closing, the intake valve starts to open???

dwcsr · 09-20-2010, 07:27 PM

The intake and exhaust are open for a short time. Its overlap for whats called scavaging. It makes sure all the exhaust gets out of the cylinder and chamber. The valves may be out of adjustment and hanging the valves open. Re adjust per the book.
As Magic said if you didn't touch the cam or gears then your ok there. Just concentrate on what you did have your hands on. check the valves, plugs, wires

09-20-2010, 07:27 PM	#3
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: As exhaust valve is 3/4 of the way from closing, the intake valve starts to open? The intake and exhaust are open for a short time. Its overlap for whats called scavaging. It makes sure all the exhaust gets out of the cylinder and chamber. The valves may be out of adjustment and hanging the valves open. Re adjust per the book. As Magic said if you didn't touch the cam or gears then your ok there. Just concentrate on what you did have your hands on. check the valves, plugs, wires Last edited by dwcsr; 09-20-2010 at 07:30 PM.