300Tdi glow plugs - Defender Source
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  #1  
Old November 18th, 2004, 09:28 AM
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Arthur Maravelis
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300Tdi glow plugs

Anyone using/preferring a particular brand/supplier's to another?
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  #2  
Old November 18th, 2004, 04:41 PM
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I've never had to change them in over 100000 miles.
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Old November 18th, 2004, 08:56 PM
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Well, in a recent cold spell here in Boston (just 15-20 deg F) I've had trouble starting even when the timer ends. Others have said to heat them for 30 seconds or more, while the manual says just to wait until the light's out.

I guess I should pull one out and check its condition.
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Old November 18th, 2004, 08:57 PM
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Move to California, mine are disconnected.
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Old November 19th, 2004, 01:17 AM
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They do wear out. Check them but also check the wiring.

The plugs in my 110 are shot and after looking around I purchased a Bosch Duraterm quick start kit. I'm just waiting for it now. They're supposed to be better and the relay keeps them on for up to 3 min after start up to help with the cold idle. This system is common in newer European diesels.

As for the wiring, I've been told to wire the plugs in parallel instead of series. It's supposed to improve performance. I'm not sure why but I guess having fewer connections between the power supply and the last plug isn't a bad thing.
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Old November 19th, 2004, 12:23 PM
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Arthur Maravelis
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Mike,

Do you have a part number for the kit or plugs? Where did you get it?

You wire them in parallel so if one fails, or its resistance changes, it doesn't affect current flow to the rest (if in a series). Parallel gets flow to each one regardless of the condition of the other.
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Old November 19th, 2004, 12:30 PM
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In parallel they also will all see 12 volts across each plug, while in series they will see 12 volts across all the plugs, so they will draw less power in series then parallel
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Old November 19th, 2004, 05:41 PM
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Will the wiring cope if they're in parallel?
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Old November 19th, 2004, 09:23 PM
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I'm getting the kit from www.impoertecparts.com. The plugs part # is 0 250 201 039. I've found two part #s for the quick start kit, in the UK it is listed as AU/086 for the Land Rover. Here in North America I couldn't find anything for Land Rovers but Bosch USA said the kit for those plugs is 0 250 201 953. This is the same # for Mercedes.

The part # for the plugs came from Bosch Germany's web site and was confirmed by a dealer in the UK.

I've read a few excellent reviews about this kit in Merc's, so If I need to change some wiring to make it work no big deal.
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Old November 21st, 2004, 12:10 PM
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Quote:
Originally Posted by mikeslandrover
Will the wiring cope if they're in parallel?
Depends, I would think you would be OK if the system runs off of a fuse and you don't have to up the value of the fuse. What size fuse is on the glow plugs? Any I dea on the wire size?
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