Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-25-2008, 08:59 PM
bpeters2's Avatar
Registered User
 
Join Date: Mar 2006
Location: NW Indiana
Posts: 198
Width of GP reamer

I was wondering if someone with a glow plug reamer could measure the exact diameter of the reaming portion of the tool. I figure its got to be a little bigger than the end of a GP. I'd like to just use a drill bit to ream out my holes when I relplace my plugs and bypass the expensive "unitasker". I've done some searching on the forum but I haven't found any exact sizes. Could you also include the car that your GP reamer is suited for. Thanks

__________________
'85 300td Frybrid WVO Kit
Reply With Quote
  #2  
Old 02-25-2008, 09:25 PM
High River Alberta Canada
 
Join Date: Mar 2005
Location: High River, Alberta,Canada
Posts: 423
diameter of GP reamer

I found that a 5/16 drill bit is too big and the one smaller 19/64 was fine. Of course there is only room to use a drill bit on a couple of them. So I made my reamer from a steel rod that diameter (19/64")about 4 inches long, bent it 90*in the middle and ground a few flutes cut in the sides for and inch or so with a dremel cut off wheel. It worked perfectly. (why I didn't just heat a 19/64s" drill bit in the middle and bend it, ?? I'm not sure)
My PGs had tested good, but 4 out of 5 were a bit hard to get out they were so clogged with carbon and I think all 5 were shorting out. I haven't started it yet as I'm rechecking cam chain stretch and valve settings.... but got interrupted with a pile of paying type work.... Reality rearing it's head, maybe tonight.
__________________
Thanx,
Alberta Luthier
1983 300CD ('Stinky')155k miles, 2.47 diff, EGR removed, AAZ injectors with 265 nozzles from Sean,and vogtland lowering springs.
1984 300SD ('Old Blue')150k Klicks from Japan originally, came with rear head rests, no sunroof and never had an EGR
Reply With Quote
  #3  
Old 02-25-2008, 10:04 PM
F18 F18 is offline
Registered User
 
Join Date: Oct 2005
Location: Massachusetts
Posts: 677
I just match up a drill bit to the diameter of the long shank of the glow plug below its thread and it worked perfectly every time I changed glow plugs on anyone of my diesels. Low tech... but it works good enough to remove carbon! Then work an old glow plug in an out with some anti-seize on the threads to make sure its clear before putting in the new one.
__________________
FRED

Daily Driver: 98 E300TD 199K
Hobby Car: 69 Austin Mini
Past Diesels: 84 300SD, 312K
87 300SDL, 251K
94 Chev. K-1500 6.5Ltr.TD, 373K

Last edited by F18; 02-25-2008 at 10:21 PM.
Reply With Quote
  #4  
Old 02-25-2008, 10:16 PM
bpeters2's Avatar
Registered User
 
Join Date: Mar 2006
Location: NW Indiana
Posts: 198
Quote:
Originally Posted by F18 View Post
I just match up a drill bit to the diameter of the long shank of the glow plug below its thread.
Shouldn't the bit be a little wider than the GP? maybe a mm or so??

Another question: If using a drill bit to ream the hole, do you need to worry about drill bit going in too deep and damaging anything. If so could someone give some suggestions about the max depth.
__________________
'85 300td Frybrid WVO Kit
Reply With Quote
  #5  
Old 02-25-2008, 10:37 PM
F18 F18 is offline
Registered User
 
Join Date: Oct 2005
Location: Massachusetts
Posts: 677
Quote:
Originally Posted by bpeters2 View Post
Shouldn't the bit be a little wider than the GP? maybe a mm or so??

Another question: If using a drill bit to ream the hole, do you need to worry about drill bit going in too deep and damaging anything. If so could someone give some suggestions about the max depth.
The drill stops against the inside of the prechamber. Your are only twirling the drill bit with your fingers primarily with light pressure against the sides of the glow plug shaft/port were the carbon dust gets compacted. Your just lightly twirling the drill in the opposite direction of the twist to break up and draw out the fine layer of carbon on the shaft walls.....you are not forcing it in there and drilling anything so there is no chance of damaging anything.
The drill bit does not have to be a perfect fit...just near to the size of the glow plug shank/shaft and not the electrode tip.
Good Luck
__________________
FRED

Daily Driver: 98 E300TD 199K
Hobby Car: 69 Austin Mini
Past Diesels: 84 300SD, 312K
87 300SDL, 251K
94 Chev. K-1500 6.5Ltr.TD, 373K
Reply With Quote
  #6  
Old 02-26-2008, 10:09 AM
aklim's Avatar
Registered User
 
Join Date: Apr 2000
Location: Location: Greenfield WI, USA
Posts: 8,514
Here is what I did when I took out my GPs. I took out the bad one and found it stiff. So I went around and took them all out. A couple more were stiff. Cleaned them throughly before I put them in again.

Reaming. Well, I took the glow plug and went to Wal*Mart. Matched up the tip with a gun bore brush and went just a hair bigger. The reamer you buy can only be so wide till it can't go thru the hole. The gun bore brush can be larger since it can bend to go in and fluff out when it gets to the other side.

After reaming, I crank the engine over a bit and blow out the carbon debris if there was any.
__________________
01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow
Reply With Quote
  #7  
Old 02-26-2008, 10:25 AM
83 300SD
 
Join Date: Mar 2007
Location: Shawano, WI
Posts: 692
Quote:
Originally Posted by bpeters2 View Post
I was wondering if someone with a glow plug reamer could measure the exact diameter of the reaming portion of the tool. I figure its got to be a little bigger than the end of a GP. I'd like to just use a drill bit to ream out my holes when I relplace my plugs and bypass the expensive "unitasker". I've done some searching on the forum but I haven't found any exact sizes. Could you also include the car that your GP reamer is suited for. Thanks
Check the parts for sale section here. Diesel911 makes and sells a great GP reamer. I know because I purchased his and have used it on both my vehicles.

John
__________________
Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI
Reply With Quote
  #8  
Old 02-26-2008, 10:40 AM
aklim's Avatar
Registered User
 
Join Date: Apr 2000
Location: Location: Greenfield WI, USA
Posts: 8,514
Quote:
Originally Posted by hangit View Post
Check the parts for sale section here. Diesel911 makes and sells a great GP reamer. I know because I purchased his and have used it on both my vehicles.

John
How would that work better than a gun bore brush? Just curious.
__________________
01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow
Reply With Quote
  #9  
Old 02-26-2008, 10:46 AM
83 300SD
 
Join Date: Mar 2007
Location: Shawano, WI
Posts: 692
Quote:
Originally Posted by aklim View Post
How would that work better than a gun bore brush? Just curious.
Does the gun bore brush carve out the hard carbon deposits? I thought gun bore cleaning also involved using solvent to soften residues. The fluted reamer actually carves out the carbon.

John
__________________
Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI
Reply With Quote
  #10  
Old 02-26-2008, 10:49 AM
aklim's Avatar
Registered User
 
Join Date: Apr 2000
Location: Location: Greenfield WI, USA
Posts: 8,514
Quote:
Originally Posted by hangit View Post
Does the gun bore brush carve out the hard carbon deposits? I thought gun bore cleaning also involved using solvent to soften residues. The fluted reamer actually carves out the carbon.

John
You can do it dry too. My point is that the fluted reamer can carve out carbon only as large as the bore it goes into. The brush can be spun around in the hole and is larger in size than the bore since it can bend to go in and expand when it gets out of the hole.
__________________
01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow
Reply With Quote
  #11  
Old 02-26-2008, 10:54 AM
83 300SD
 
Join Date: Mar 2007
Location: Shawano, WI
Posts: 692
Quote:
Originally Posted by aklim View Post
You can do it dry too. My point is that the fluted reamer can carve out carbon only as large as the bore it goes into. The brush can be spun around in the hole and is larger in size than the bore since it can bend to go in and expand when it gets out of the hole.
Why not use both? I'll remember the brush next time I have to change GPs.

I guess if you're really curious, try the brush first and then the reamer on the first port. Then do the opposite on the next port. Not a controlled study but it might satisfy your curiosity as to which, if either, does a better job.

If a brush was better, wouldn't MB have designed one for use in their cars?

John
__________________
Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI
Reply With Quote
  #12  
Old 02-26-2008, 11:01 AM
DeliveryValve's Avatar
Chairman of my Benz
 
Join Date: Jun 2006
Location: Central California
Posts: 4,159
Quote:
Originally Posted by aklim View Post
You can do it dry too. My point is that the fluted reamer can carve out carbon only as large as the bore it goes into. The brush can be spun around in the hole and is larger in size than the bore since it can bend to go in and expand when it gets out of the hole.
I don't believe a gun brush to be stiff enough to cut through the carbon I had in my recent glow plug change.


Quote:
Originally Posted by hangit View Post
Why not use both? I'll remember the brush next time I have to change GPs.

...
I would agree that doing this in combination would supplement each other and do an extremely very good job in cleaning.
__________________
1983 123.133 California
- GreaseCar Veg System


Reply With Quote
  #13  
Old 02-26-2008, 11:04 AM
aklim's Avatar
Registered User
 
Join Date: Apr 2000
Location: Location: Greenfield WI, USA
Posts: 8,514
Quote:
Originally Posted by hangit View Post
I guess if you're really curious, try the brush first and then the reamer on the first port. Then do the opposite on the next port. Not a controlled study but it might satisfy your curiosity as to which, if either, does a better job.

If a brush was better, wouldn't MB have designed one for use in their cars?
I didn't have the reamer handy or I would have tried the reamer then blow it out and see if the brush can scrape off more dust. Note, there wasn't a lot to begin with.

They also designed the 722.6 which was said to be lifetime fill. I tend not to take the word of MB as the final word. Sure, they have a say but I don't take them as the be all and end all.
__________________
01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow
Reply With Quote
  #14  
Old 02-26-2008, 11:05 AM
83 300SD
 
Join Date: Mar 2007
Location: Shawano, WI
Posts: 692
Another trick I used yesterday while changing the GPs was injecting some Diesel Purge through each GP port into the prechamber. I let it sit for a couple of hours before starting up. This idea came to me after viewing the pics posted on the forum of the clogged prechambers in that broken motor.
http://www.peachparts.com/shopforum/showthread.php?t=214643

Not sure if it helped, but the SD starts up easily now!

John
__________________
Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI
Reply With Quote
  #15  
Old 02-26-2008, 12:51 PM
bpeters2's Avatar
Registered User
 
Join Date: Mar 2006
Location: NW Indiana
Posts: 198
Quote:
Originally Posted by F18 View Post
The drill bit does not have to be a perfect fit...just near to the size of the glow plug shank/shaft and not the electrode tip.
Good Luck
can someone confirm this statement is correct (I don't mean to disrespect you F18). I was under the impression that the area that needs to be reamed surrounds the electrode not the shank.

__________________
'85 300td Frybrid WVO Kit
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 11:35 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page