2005 Audi A3 Logo
Anonymous Posted on Dec 08, 2011

Replace glow plug on audi a3 2005

It is a 2.0 tdi audi sportsback. I have openned the plastic cover but cant find the glow plugs. please help how to replace the glow plugs?

1 Answer

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  • Audi Master 5,692 Answers
  • Posted on Dec 08, 2011
fordexpert
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If this is a Diesel engine, the glowplugs would be in a position like a sparkplug. You can replace them as you wish, or replace only the bad one. To determine if a glowplug is bad, you would remove it as you do a sparkplug on a gas engine.

With several of the glowplugs removed, you would place a battery jumper cable on one end of the glowplug, while being careful not to damage its threads. That cable would be connected to the NEG battery cable. The remaining cable would be placed on the Positive(+) terminal of the battery and then you would briefly tough the POS cable to the top of the glowplug.

Do this briefly. You can melt the part. But you need to see if the glowplug will glow. Often the problem with glowplugs is the Timer box. This is the box from where the wires come from to go to the glowplugs.

If you have a glowplug staying dark, or failing to glow well, then it is a bad glowplug. Each should glow the same. That is why you check several at a time to tell what is normal.

I work on Ford diesels and do not know what plastic covers you may have. So just follow the wires that are not on the fuel injectors and that is all you can possibly do.

  • Anonymous Dec 08, 2011

    Thanks mate. The plastic cover i was talkin abt is the cover on the audi engine, i guess noise reduction thing or watever.There are no wires that can be seen going to any plugs. So far wat i have vbeen able to gather from googling around is that the glow plugs of this model are under the cam cover. if so, gasket must be involved too? like i'll have to replace the gasket too right?

  • fordexpert Dec 09, 2011

    Hello, I tried to index a 2005 A3 on the NHTSA site and did not show an A3 for that year. But the 2006 shows several A3comments at AboutAutomobile.com. Also Audi-sport.net has some comments about leaking 2005 cylinder heads and that a "B" series is prone to cracking versus a modified "C" head which is okay. The antifreeze in the cylinder could give the impression of a bad Glowplug. Tried to find a freestanding photo of your cylinder head but no luck. You need to have the engine pressure checked for a cracked head. Not a do it yourself job. Good Luck

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