Bad glow plug?
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Bad glow plug?
"Service engine light soon" indicator light came on last weekend. Guy at Auto Zone plugged tester in truck and said glow plug to 8th cylinder was bad. Bought Haynes manual and found out that I would have to remove valve cover to access glow plug, would need special tool to remove wire to glow plug, and .... Now I am wondering: What could have caused glow plug to go bad? Is it normal for glow plugs to go bad? Truck has 102,000 miles on it (06 F350). Will it do any damage to engine by continuing to drive it with bad glowplug?
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The Glow Plugs on a 6.0 are below the valve cover, not under it. First ckeck them for continuity with an ohm meter. Also ckeck for + voltage at the glow plug connector. There is a 4 pin connector on each side of the engine. To pull the connector apart I had to remove a red retainer clip from the connector. Be careful not to cut your hands up like I did, there's not much room to work. Check out this site for details on the 6.0. http://www.backglass.org/duncan/ps60_manual/
Page 66-69. Be careful not to break the buss bar.
Page 66-69. Be careful not to break the buss bar.
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Driving with a bad glow plug shouldn't harm anything as long it's in one piece. A bad plug may cause cold starting issues like I have. Don't know why they burn out other than from use. Better a $20 glow plug and not a $200 GPCM.
Good Luck
Good Luck
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Nousername, Thanks for info. Will look at truck tomorrow. Plug WOULD be at the BACK of engine, wouldn't it? If I remember right, part of the turbo may run over that part of engine. Is it like changing a spark plug? Used to change those every year on 65 Impala I used to have back in high school. Guy at Autozone quoted over $20 for the glowplug. O'Reillys price $9. What would explain that big of a difference? That backglass site you referred to said there may be a short in cable. Hope that's not the case!
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