The Ford Barn

jamar1905 · 04-02-2014, 06:57 PM

I have no compression on the # 2 cylinder...what could be causing this?

tbirdtbird · 04-02-2014, 07:01 PM

car been sitting long time?
Stuck valve....

Tom Wesenberg · 04-02-2014, 07:25 PM

Yep, many a stuck valve from setting. You could blow compressed air into cylinder 2 and see if it comes out the carb, exhaust, or oil fill pipe. This will let you know which valve is the problem, or if it's a hole in the piston (unlikely). Be sure to have #2 on TDC firing before blowing in the air.

tbirdtbird · 04-02-2014, 07:36 PM

might be able to pull the plug and look in and see which one is stuck

Purdy Swoft · 04-02-2014, 08:46 PM

My vote is also a stuck valve. Might as well go ahead and remove the valve cover so you can work with it. Ethanol fuel can cause this. Marvel mystery oil added to the fuel and crankcase will help avoid this problem.

tbirdtbird · 04-02-2014, 09:47 PM

Sponsored Links (Register now to hide all advertisements)

Agree, MMO is the way to go. I use 4 oz per 10 gals in ALL my old cars and 1/2 QT with an oil change. Been burned by crapahol fuel too many times, it is a pox

Purdy Swoft · 04-02-2014, 10:23 PM

With the valve stuck in the open position, I have removed the spring and used pliers on the valve stem to gently move and unstick the valve . Kroil, PB Blaster or some other penetrant can be sprayed on the valve through the spark plug hole. In worse cases the manifold assy. will need to be removed so that penetrant can be applied directly to the valve stem. It can be a pain but I've never had to remove the head to unstick a valve.

04-02-2014, 06:57 PM	#1
jamar1905 Junior Member Join Date: Sep 2012 Posts: 11	no compression on # 2 cylinder I have no compression on the # 2 cylinder...what could be causing this?

04-02-2014, 07:25 PM	#3
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: no compression on # 2 cylinder Yep, many a stuck valve from setting. You could blow compressed air into cylinder 2 and see if it comes out the carb, exhaust, or oil fill pipe. This will let you know which valve is the problem, or if it's a hole in the piston (unlikely). Be sure to have #2 on TDC firing before blowing in the air.

04-02-2014, 07:36 PM	#4
tbirdtbird BANNED Join Date: May 2012 Location: inside your RAM Posts: 3,134	Re: no compression on # 2 cylinder might be able to pull the plug and look in and see which one is stuck __________________ '31 180A

04-02-2014, 08:46 PM	#5
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: no compression on # 2 cylinder My vote is also a stuck valve. Might as well go ahead and remove the valve cover so you can work with it. Ethanol fuel can cause this. Marvel mystery oil added to the fuel and crankcase will help avoid this problem.

04-02-2014, 09:47 PM	#6
tbirdtbird BANNED Join Date: May 2012 Location: inside your RAM Posts: 3,134	Re: no compression on # 2 cylinder Sponsored Links (Register now to hide all advertisements) Agree, MMO is the way to go. I use 4 oz per 10 gals in ALL my old cars and 1/2 QT with an oil change. Been burned by crapahol fuel too many times, it is a pox __________________ '31 180A

04-02-2014, 07:01 PM	#2
tbirdtbird BANNED Join Date: May 2012 Location: inside your RAM Posts: 3,134	Re: no compression on # 2 cylinder car been sitting long time? Stuck valve.... __________________ '31 180A

04-02-2014, 10:23 PM	#7
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: no compression on # 2 cylinder With the valve stuck in the open position, I have removed the spring and used pliers on the valve stem to gently move and unstick the valve . Kroil, PB Blaster or some other penetrant can be sprayed on the valve through the spark plug hole. In worse cases the manifold assy. will need to be removed so that penetrant can be applied directly to the valve stem. It can be a pain but I've never had to remove the head to unstick a valve.