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Glow plugs

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Sorry, your cars had what mileages on them? And they were driven in Ontario, where roads are salted half the year, helping corrode them in place, right?Lebikerboy.... they're seized. If you think anyone else can get them out, go for it. And you can write me a cheque for the process of getting a new head when they break off. Remember Glenn reporting he tried to dislodge some seized plugs? And what happened then? They broke off.Also, "You're Welcome" for being the one who discovered this and now has a nearly inoperable car while you all go off and have your plugs easily changed and happily motor away.

Actually Duck, I think you should have a compression test done. Sounds like you have a big loss of compression, most likely worn cylinders causing this hard start, not the glow plugs. If a compression test shows a bad cylinder then a leak down test will pinpoint where the loss of compression is coming from. Edited by MightyMouseTech

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There's no use crapping on everyone taking part in the thread Iain... We're all here to learn from good and bad experiences, and derive from that a plan to help ALL OWNERS get more distance out of their cars. Clearly there is a need to document potential issues, and good ways to avoid them. Unfortunately, you need issues to get the ball rolling. And at 270,000 kms... you should certainly anticipate some issues.So yes, some owners will potentially benefit from your misfortune of having seized glow plugs. C'est la vie

Edited by smartzuuk

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Actually Duck, I think you should have a compression test done. Sounds like you have a big loss of compression, most likely worn cylinders causing this hard start, not the glow plugs. If a compression test shows a bad cylinder then a leak down test will pinpoint where the loss of compression is coming from.

...except that they cannot do a compression test because they do that through the glow plug holes!!-Iain

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...except that they cannot do a compression test because they do that through the glow plug holes!!-Iain

Aw crap, thought they might use the injector holes.

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Do you have anything resembling this available? (See attachment)I got the picture from Finnish Mercedes forum, the accompanying text is:[on the left, bigger box]Tool works like this: You turn the glow plug with the included torque wrench simultaneously using the air-operated vibrator. Often this loosens up a plug which would break without moving at all if only hand tools were used. But if the plug does break...[on the right, smaller box]Upper part of the glow plug is removed. Inside part of the plug is then removed with a slide hammer. If that doesn't work, weld a small weld to the tip to prevent the slide hammer from slipping and the bar from the plug will come out. Then a special drill is used which has two different sized cutting tips and a stopper. Drill down until the stopper hits the cylinder head. Blow the area clean with compressed air. Next a tap is used which looks like a thread tap for a thread tap. Drilling has taken out everything else from the threaded part of the glow plug except the threads. This tap will remove the thread easily. Clean again with compressed air.Next another tap is used to make threads to the remaining part of the glow plug, clean with compressed air. Screw an extractor to the new thread and tighten again until the remaining part comes out. If the plug breaks again, make another thread and repeat if possible. If all fails, start the engine and leave it running and let it warm up to normal operating temperature. Use the extractor again and eventually the remains will come out.

post-7775-1267216058_thumb.jpg

Edited by bheinola

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Very elegant! A little air-hammer vibrator wrench. Never seen that before...Bil :senile:

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