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#1
09-22-2007, 02:23 AM
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Tight spark plugs
OK, I changed four plugs on my new 1987 560 SEC. I started on the passenger side. I had to wrench them all the way out, they were a bit tight. When I got to the the other bank, I started on the first one, loosened it from the seat and it got real tight, could not back it out. Didn't want to break it so ran it back in and quit.
Talked to a friend of mine, a good indy, and he told me to just take it out. So, do I use a long breaker bar to back them out or what? I do have a thread chaser to use after they are out. Is this the best way to go? BTY, what is the firing order? Thanks Reed Last edited by Reed007; 09-22-2007 at 02:42 AM. Reason: screwed up post 
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#2
09-22-2007, 02:52 AM
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Was the engine cold, warm or hot when you did this?
Mike
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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine) 1988 F150 144,000 miles (leaks all the colors of the rainbow) Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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#3
09-22-2007, 07:32 AM
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spray some penetrating oil in around the base and work it back in and out a few times. It will probably get easier.
You won't break the plug but in worse case you might bring along the aluminum threads, but you can heli coil them and not much will be lost. As he said it needs to come out sooner or later anyway. tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#4
09-23-2007, 02:23 AM
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The engine was cold. Yea, they need to come out eventually. I will try it hot after I try the penetrating oil. The threads seems OK, no loose metal on the plugs that I took out, probably just crud.
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Reed 1987 560 SEC 1980 Triumph Spitfire (drove off the showroom floor) work in progress 1980 Triumph Spitfire (parts car) 1999 Jeep Grand Cherokee (wife's)
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