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#48886 08/11/2005 3:23 AM | Joined: Jun 2003 Posts: 565 'Bolter | | 'Bolter Joined: Jun 2003 Posts: 565 | Hey everyone.
I seem to have a loose exhaust valve guide on #1 cylinder. What possible damage might this cause if I continue to drive the truck? Is it time to pull the head and take it to the machine shop? Oh yea, if it matters its a 1957 GMC with a 270.
Thanks for all replies.
Jeff
"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."
1957 GMC 150
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#48887 08/11/2005 11:00 AM | Joined: Apr 2005 Posts: 926 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 926 | Do you mean loose like worn on the inside bore,or loose like in slipping around in the cylinder head? If it's worn in its bore,probably the worst effect would be exhaust smoke,increased oil consumption,and an imprecise valve seal;the valve would eventually burn and leak more,from its rocking in the valve seat and leaking.
If the guide is slipping around in the head,it could break,or stick on the valve stem or in the head,the valve could stick open possibly causing a bent pushrod,or a hole in the piston.
Better to fix the problem as soon as possible,and drive very gently until then.
Speed | | |
#48888 08/12/2005 1:48 AM | Joined: Jun 2003 Posts: 565 'Bolter | | 'Bolter Joined: Jun 2003 Posts: 565 | Thanks for the reply Speed.
I havent looked that close yet, I do know Im getting some blow-by at that valve. I guess its time to pull the head. I dont want a burned valve, or worse!
Thanks again.
"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."
1957 GMC 150
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