I just reamed with a drill bit. I have 1981 300D (OM617) i I started with 1/4 drill bit. It would not fit. Went to 7/32 and reamed my way through. I had to twist and push and it opened up. Then I put back in the 1/4 and reamed through. I did not have a 9/32 so i tried a 5/16. I could not get it through so I figured I ws done. Is the 0m617 reamer 1/2 inch??? If so I have much more reaming to do.

thanks.

All places i saw , these have really gone up in price.

Put a little grease on the reamer so the powdery carbon will stick to it- you will have to ream each hole more than once to get the carbon out. Mine were so caked with carbon I had to carve and twist just to get the reamer in on the first pass.
PO put brand new GPs in but the car still coughed a bit upon cold startup. Reaming the glow plug holes fixed this in my case. So, when you change your glow plugs, ream the holes out before you put the new ones in or the job is not complete.

__________________
'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)

i call price gouging!! it cant cost more than 2$ to make this thing

Thanks. But what diameter was your final reamer? My final size was 1/4 inch and it had a little play. was that big enough?

I used a reamer that I got from Performance Products a couple years back for about $30. It's one tool, one size. What you are trying to achieve is to remove the cake that forms around the glow plug ends. The diameter of the reamer is more than 1/4", more like 3/8" or 9-10mm.

__________________
'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)

A good reaming is always wise (of your glow plug ports)

__________________
1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair

I have the reamer available in the tool rental sticky area at the top of the page. $6....I've used it succesfully on my car. Its available but I'm getting up to speed with paypal and getting quickly back to people....I see this tool as a "must use" but not "need to own" It worked great on my '85 300D...

Rob "stayalert" M
Concord, MA

I could prolly alos provide some measurements (I've done it before) if you're inclined to make your own..

Cheers and kind regards

__________________
Rob M
Norwich, VT USA
1980 240D Euro delivery 4 speed manual silver/blue
~160K miles

Mercedes-Benz 601 589 00 53 00 Diesel Glow Plug Hole Reamer, 12 x 1.25mm, For engine OM601, OM602, OM603, OM615, OM616, OM617. For "Pencil" Type.

I will try to post pictures of my MB gp reamer.

Diesel Glow Plug Hole Reamer, 18 x 1.5mm with 3/8" drive.For
early Model OM615, OM616, OM617, OM 601. For large type
glow plugs. $153.88



if i may say... wtf im so borrowing one from someone here when i find out i have bad plugs and upgrade to pencil style

Mine were plugged almost solid to the plugs. After reaming the car starts like summer down to 0 degrees (cold as it's gotten so far) and cured my cold start stumble. I would highly recommend this when doing plugs, it's worth it.

__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section

$34.25 (no knowledge of seller or any connection, just passsing it on)


http://cgi.ebay.com/ebaymotors/Mercedes-Diesel-Engine-12mm-Glow-Plug-Repair-Tool_W0QQitemZ4598557107QQcategoryZ35625QQrdZ1QQcmdZViewItem

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

Great. I saw that yesterday. But I need a 3 dimensional glow plug reamer. Oh i get it, the only way the 12 makes sense is as the diameter because the units must be mm since they are not specified and the thing is obviously longer that 12 mm. Arg. I have a lot of reaming to do. Quick to the reamer rental post. Someone please correct me if i am wrong . Please . I am begging.

You idiot . You are so wrong. 12 mmm is the size of wrench you need to turn the glow plugs. From the picture you saw yesterday the reamer tip is obviously much smaller that that. Just rent the damn reamer and measure it when you get it. It is time for you to go to bed.

come on be nice. we all have our momets when something just doesn't click.

__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section