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

mrsmothers · 07-02-2013, 08:42 PM

Well I got my 50 on the road runs pretty good. I set the valves the other day while it was idling and got them all nice and quite. When I get in to 3rd gear you can hear a rattling , if i get to far up on my rpms it back fires. Also keeps blowing the pcv valve out of the valve cover. its a 350 btw.

So the question is why is it doing this? valve to tight, valve to loose, timing off?
should I re adjust the valves at higher rpm?

07-02-2013, 08:42 PM	#1
mrsmothers Registered User Join Date: Oct 2010 Location: ruston la Posts: 169	Its getting better but still wrong. Well I got my 50 on the road runs pretty good. I set the valves the other day while it was idling and got them all nice and quite. When I get in to 3rd gear you can hear a rattling , if i get to far up on my rpms it back fires. Also keeps blowing the pcv valve out of the valve cover. its a 350 btw. So the question is why is it doing this? valve to tight, valve to loose, timing off? should I re adjust the valves at higher rpm?