| Author |
Message |
    
mike mcmahon
Visitor
| | Posted on Thursday, November 22, 2012 - 04:11 pm: | 
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Greetings, I have a p60 22hp inboard gas engine and the last two times we have done spark plug changes we were unsuccessful at freeing up the fourth (very rear) plug. Some salt water dripped on it and it and it seized. I have put quite a bit of torque on it numerous times, am afraid of shearing plug in half. What are my penetrant choices. PB blaster. would love some help on this on.
thanks,
mike |
Eddie Ross
Senior Member
Username: eddie
Post Number: 306
Registered: 04-2003
| | Posted on Friday, November 23, 2012 - 02:00 am: |
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Soak it with liquid wrench over night. Tap around area with light wraps with hammer to set up a vibration every few hours. Whenever you put in spark plugs in the future use anti-seize on threads of spark plugs when installing. |
J.B. Castagnos
Senior Member
Username: jb_castagnos
Post Number: 738
Registered: 07-2002
| | Posted on Friday, November 23, 2012 - 09:20 pm: |
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If it's not missing you may want to leave it alone. If you do attempt to remove it, try to move it back and forth a little at a time, increasing with each move. If it breaks off, it will probably leave the threaded portion in the head. You can use a sabre saw to cut most of the plug to near the thread in several places, use a punch to break the thread out. Air into the intake manifold, intake valve open, most of the filings should blow out. A magnet to retrieve the pieces, put them together to be sure you have everything. |
Pete Risnes
New member
Username: windnwaves
Post Number: 1
Registered: 07-2013
| | Posted on Tuesday, July 16, 2013 - 11:34 am: |
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When I got to the back #4 plug... I can't get it out! We've tried everything, liquid wrench, WD40 , cleaned rust around the plug, the socket for the plug is a 7/8. Now we've pounded a 13/16 on it and that's slipping with the amount of pressure we've put on it with a breaker bar. Of course by now the plug is broken and pretty rounded.
We then decided to try to pull the head and have run into frozen head bolts too (3). There are two back bolts that are pretty rounded so we haven't even attempted to put a tool on them.
So now back to trying to get the plug out. As there is little space to reach that plug we have drilled a hole through the cockpit to try to use an impact wrench next. We'll try that later today. If that doesn't work... I'm out of ideas. I've got bloody knuckles and cuts all over my arms and am frustrated to the max. Any ideas?. I did read the above article about using sabre saw but so little space I don't see how we can do that either. Is there another way? |
Pete Risnes
New member
Username: windnwaves
Post Number: 2
Registered: 07-2013
| | Posted on Tuesday, July 16, 2013 - 11:46 am: |
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The impact wrench didn't budge it either! It is rounded to the point we can't get a grip on it at all. Is there such a thing as an easy-out or a way to drill it out? Is it safe to run on 3 cylinders? |
Richard A. Day Jr.
Senior Member
Username: richardday
Post Number: 1068
Registered: 11-2003
| | Posted on Tuesday, July 16, 2013 - 02:41 pm: |
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Why do you think they have impact sockets with mating flats so you don't round the flats on the plug??? Sounds like you will need a pipe wrench now to grasp the plug. |
Roger DiRuscio
Senior Member
Username: solarrog
Post Number: 545
Registered: 03-2002
| | Posted on Tuesday, July 16, 2013 - 08:32 pm: |
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If you have head bolts, grind the heads off and remove the head, If you have studs with nuts, split them and remove the head. Sometimes heat cycling the plug with a torch helps, but it doesn't sound like you have that much room. Use anti seize when you reassemble. It saves so much grief the next time you work on it. |
Pete Risnes
New member
Username: windnwaves
Post Number: 3
Registered: 07-2013
| | Posted on Sunday, July 21, 2013 - 11:05 pm: |
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I got it out and it's running great! Thank you. |
Eddie Ross
Senior Member
Username: eddie
Post Number: 312
Registered: 04-2003
| | Posted on Monday, July 22, 2013 - 11:50 am: |
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Don't forget to put anti-seize on the threads when installing the spark plug. BTW, how did you finally get it out ? |
Richard A. Day Jr.
Senior Member
Username: richardday
Post Number: 1069
Registered: 11-2003
| | Posted on Tuesday, July 23, 2013 - 08:15 am: |
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How did you get it out??? |
Pete Risnes
Member
Username: windnwaves
Post Number: 4
Registered: 07-2013
| | Posted on Wednesday, July 24, 2013 - 10:50 am: |
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Chipped away at the rust around the plug and used Tri-Flow. I had to drill a hole through the cockpit to get access and put a pipe down there and hammered until I was able to get a 3/4 socket to fit over what was left of the plug and used a breaker bar and it finally came loose. |
Eddie Ross
Senior Member
Username: eddie
Post Number: 313
Registered: 04-2003
| | Posted on Wednesday, July 24, 2013 - 12:26 pm: |
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Thanks. Glad it worked out for you. |
