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Erik Ks farmer
Tractor Expert
Joined: 11 May 2009
Posts: 1985
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 Posted: Sun Oct 07, 2012 3:43 pm Post subject: 361 Ford question |
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I have a 361 in a 76 Ford cabover that I haul grain with, it started running rough under load on the last couple loads of corn I took in, I picked up a fuel pump, but I got to looking it over before I took the pump off. The #3 plug on the right bank was loose and the wire had melted to it. I pulled out the plug and the threads are a mess. I'm not sure what to do here, what would have caused the plug to work loose? Is it worth trying to thread a new plug in to get through bean harvest (86 acres)?
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J.Wondergem
Tractor Expert
Joined: 05 Mar 2009
Posts: 2009
Location: Rockford, Mi
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| Posted: Sun Oct 07, 2012 3:45 pm Post subject: Re: 361 Ford question |
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Or put a heli coil in , then a new plug.
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Ted in NE-OH
Guest
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| Posted: Sun Oct 07, 2012 3:53 pm Post subject: Re: 361 Ford question |
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Re-tap and see if it holds
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cole in mo.
Long Time User
Joined: 29 May 2002
Posts: 831
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| Posted: Sun Oct 07, 2012 3:55 pm Post subject: Re: 361 Ford question |
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Somtimes a plug will work loose, then the cumbustion blows past the threads, causing what you see on yours. Ease a new plug in it and go.
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60 acre hillside
Long Time User
Joined: 27 May 2010
Posts: 632
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| Posted: Sun Oct 07, 2012 3:59 pm Post subject: Re: 361 Ford question |
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I have a 18mm spark plug clean-up die they are available at most any parts house
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Shorty 38
New User
Joined: 07 Oct 2012
Posts: 2
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| Posted: Sun Oct 07, 2012 4:03 pm Post subject: Re: 361 Ford question |
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Yes, Heli-coil is the answere, I found the bushing type to work the best for spark plugs.
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DeltaRed
Tractor Guru
Joined: 25 Feb 2010
Posts: 6430
Location: Delta,colorado
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| Posted: Sun Oct 07, 2012 4:05 pm Post subject: Re: 361 Ford question |
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At one time I had a 390 in a '67 F 100 that would
rutinely "blow out" a plug(always the same
hole).Screw it back in and keep on
going.WARNING:wear gloves before screwing hot plug
back into engine.
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Shorty 38
New User
Joined: 07 Oct 2012
Posts: 2
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| Posted: Sun Oct 07, 2012 4:05 pm Post subject: Re: 361 Ford question |
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Yes, Heli-coil is the answere, I found the bushing type to work the best for spark plugs.
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BushogPapa
Tractor Guru
Joined: 26 Dec 2001
Posts: 5148
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| Posted: Sun Oct 07, 2012 4:16 pm Post subject: Re: 361 Ford question |
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IF you get the idea to pull and replace the head...
The 361 and 391 He DO NOT interchange with the 352, 360 or 390 engines...
The Heat passages through the Heads are in a different place and will not match the Intake manifold..
You would need to replace the entire pair of Heads and the Intake, to use 352/360 or 390 Heads..
BTDT...
Ron..
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Huskers86
Long Time User
Joined: 14 Aug 2010
Posts: 897
Location: Loomis,Ne.
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| Posted: Sun Oct 07, 2012 4:30 pm Post subject: Re: 361 Ford question |
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Go to the auto parts store and get a thread chaser. It's a tap for straightning out plug holes. I've used that thing many times on buggered up plug threads and have had great results. I don't think you want a heli coil as I'm sure the plug seat is tapered.
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Brian Jasper co. Ia
Tractor Expert
Joined: 16 Dec 2007
Posts: 2629
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| Posted: Sun Oct 07, 2012 5:46 pm Post subject: Re: 361 Ford question |
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I"d try the thread chaser. For anything else Ford FE related, check out Ford FE dot com. If you want to replace the heads, I have a set plain 390 pickup heads still in the wrappers from a rebuilder and a cast iron S code 4V intake. Email me if interested.
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RodinNS
Tractor Guru
Joined: 01 Sep 2005
Posts: 12177
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| Posted: Mon Oct 08, 2012 6:12 am Post subject: Re: 361 Ford question |
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Try chasing the thread with a tap. If that doesn't tighten it up, use a Heli-Coil. That will work.
Rod
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