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  #1  
Old 09-29-2009, 11:57 PM
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Homemade glow plug reamer?

I found a thread in this forum that suggested making a reamer by flattening out the end of an old GP and sharpening the edges.

Sounds do-able to me but my question is: How wide is the hole that I'm reaming? As wide as the threads on the GP?

I'd hate to flatten the old plug too much and damage/get it stuck in the hole. Any ideas? Better yet, how about a photo of the chamber where the GP hangs out!

Thanks guys.

Last edited by whunter; 10-26-2013 at 12:14 AM. Reason: title spelling
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  #2  
Old 09-30-2009, 12:15 AM
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Really?? A proper glow plug hole reamer is not that expensive you know.
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  #3  
Old 09-30-2009, 01:50 AM
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I believe one of the threads also mentioned using a 7mm drill bit twisted by hand.
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  #4  
Old 09-30-2009, 02:01 AM
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Oh man

Oh man, if you have to change glow plugs, God be with you. But I think yours was a W123? Mine's a W124. Big job for those who don't do it for a living.

I was lucky enough to find someone on this forum who sent me his to use. Might want to ask around.
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  #5  
Old 09-30-2009, 05:49 AM
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I made my reamer out of a glow plug,I believe I added .040 to the diameter.I used a caliper to measure.
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  #6  
Old 09-30-2009, 11:28 AM
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Quote:
Originally Posted by LMN_ View Post
I removed the working portion of a blown out glowplug, drilled it out and welded a 5/16" drill bit into it.

Remember to use anti-seize to catch the carbon on the bit when reaming.

In the Service Manual it tells you to use Grease in the Grooves (Flutes) of the Reamer to trap the Carbon. They do not give a special type of Grease.

I use Wheel Bearing Grease becaust that is what I have available.
I tried Vasoline but it is too runny at normal temps.

If any Grease gets in the Prechamber I think it would burn. I am not sure what antiseeze would do. Although, antiseez is less likely to come out of the Grooves.
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  #7  
Old 09-30-2009, 01:35 PM
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Quote:
Originally Posted by Diesel911 View Post
I believe one of the threads also mentioned using a 7mm drill bit twisted by hand.
I've done this, worked fine. It was tough to get a good grip on it at times though.
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  #8  
Old 09-30-2009, 01:49 PM
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Hats off...

Quote:
Originally Posted by LMN_ View Post
I removed the working portion of a blown out glowplug, drilled it out and welded a 5/16" drill bit into it.
The ingenuity of the forum members here never seizes to amaze me... I tip my hat to ya - great tool.
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  #9  
Old 09-30-2009, 03:11 PM
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Is a reamer really necessary?

I stuck a drill bit in there and didn't feel a thing. Unless the purpose it to clean the prechamber walls.

Danny
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