broken plug stuck in block
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Junior User
Joined: Jun 2005
Posts: 66
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From: Grand Traverse, MI
broken plug stuck in block
I've got a plug that not only broke, but is stuck. I can loosen it with a 24in breaker bar but damn, it's not coming out well. Rather than crank on it, I took a break and thought I would throw this problem up on here.
What to do, what to do?
It's the very rear plug on the passenger side. I don't know the cylinder number off-hand but it's the ol' 351w on my 85.
From the looks of it, the previous plugs were gapped at .09 where as the plate calls for .042 to .048. Ouch!
Broke 4 old wires taking them off. Thank goodness I had new wires all ready.
Replaced the rotor too but got a bad cap (one of the points is installed backwards) and can't exchange it until I get the plugs finished.
Should I keep cranking on the plug until it comes out and hope for the best or am I in a danger zone of not being able to replace it without some major work? I've got some 3-in-1 oil but no torch to heat it. What a pain the butt.
What to do, what to do?
It's the very rear plug on the passenger side. I don't know the cylinder number off-hand but it's the ol' 351w on my 85.
From the looks of it, the previous plugs were gapped at .09 where as the plate calls for .042 to .048. Ouch!
Broke 4 old wires taking them off. Thank goodness I had new wires all ready.
Replaced the rotor too but got a bad cap (one of the points is installed backwards) and can't exchange it until I get the plugs finished.
Should I keep cranking on the plug until it comes out and hope for the best or am I in a danger zone of not being able to replace it without some major work? I've got some 3-in-1 oil but no torch to heat it. What a pain the butt.
Last edited by smuggler; Nov 26, 2005 at 12:06 PM. Reason: grammar
Posting Guru
Joined: Jul 2003
Posts: 1,280
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From: alaska
there is no "good" way to do that. soak it with oil. wrench it out and hope it doesnt mess the threads in the block up. after you get it out , use a spark plug thread chaser to clean the threads up. the spark plug is softer than the head and you might get lucky.dont make the mistake of screwing another plug into the hole without chasing the threads first and use some antisieze on the new plugs, my 2c's,bob
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Joined: Sep 2003
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From: Right Next to U
Hopefully your're going toward the left to loosen, doesn't matter which side of the motor you're on, counterclockwise is the way to loosen, the reverse is to tighten. If you have already gone to the breakerbar, the thread is already stripped, the more you turn, its bound to get small bits of metal inside the cylinder, a good rod magnet thats has a flexable shaft will remove most of the bits of metals, hopefully you haven't turn the engine over. A pair of needle nose vice grips, and while pulling it outwards may dislodge it, if you can find a pair that will fit inside the hole to give you enough room for leverage.
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Junior User
Joined: Jun 2005
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From: Grand Traverse, MI
well I got it out, chased it and put the new plug in. Looks like something around there is smoking, can't tell if its the valve cover gasket or the exhaust manifold *sigh* I let it run a good while hoping it was the oil I sprayed on but it never let up. I'll re-tighten that plug and look again.
More smoke coming from near the water pump as well, and a trickle of red fluid is coming from a power steering fitting.
More smoke coming from near the water pump as well, and a trickle of red fluid is coming from a power steering fitting.
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
I would get some 'liquid wrench' and soak that plug. Let it sit for twenty minutes and hit it again. Then screw it in and out, without using too much pressure and soak it again. Repeat as necessary.
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