best f*ing wrench for changing glow plugs - PeachParts Mercedes-Benz Forum

resago2000 · #1 03-06-2022, 07:40 PM

https://www.aliexpress.com/item/4001274933004.html?spm=a2g0o.9042311.0.0.27424c4dAXpXzK

just replaced all my glow plugs. this is the wrench to have

CanadasHistory · #2 03-07-2022, 12:37 AM

This is better
https://www.gearwrench.com/products/wrenches/ratcheting/combination/86912-12mm-90-tooth-12-point-ratcheting-combination-wrench

imgolden · #3 03-07-2022, 02:29 PM

+1 on Canada's input. Those ratcheting little pass-through wrenches are perfect for glow plugs. Saves quite a bit of time, especially if you are reaming.

BillGrissom · #4 03-11-2022, 06:02 PM

I also use ratcheting box wrenches. It was very tedious before I got a set of metrics at HF. As I recall, 8 mm for the electrical nut and 10 mm for the glow-plug body though vaguely recall perhaps some being 12 mm. I've run a tap thru a few times, but never found any of the carbon debris that people speak of. I've been documenting glow-plug changes in my 2 300D's and some have lasted only 22K miles (VSP and CFP Chinese brands I recall, though might be Autolite and Champion too).

Diesel911 · #5 03-11-2022, 11:06 PM

Pics after using a glow plug reamer attached.

resago2000 · #6 03-14-2022, 12:17 AM

same here, just a little carbon dust came out when I reamed mine.

it got down to freezing here. went out in the morning, glowed the plugs, the motor started i n half a turn.
I guess all of my old plug plugs were dead LOL

JHZR2 · #7 03-14-2022, 11:01 AM

I agree ive never seen a lot of carbon when reaming with a tool or drill bit (7mm iirc?). I always vacuum out the holes though...

imgolden · #8 03-14-2022, 03:05 PM

I've reamed 3 different engines now, and they all came out like Diesel911's picture. Not sure if it made a noticeable differnece, but it sure was satisfiying.

mike280 · #9 03-15-2022, 08:39 AM

that seems like the worst FUklng wrench for glow plugs.

the Gearwrench flex head are the best.

https://www.gearwrench.com/products/wrenches/ratcheting/combination/9910d-10mm-72-tooth-12-point-flex-head-ratcheting

sgnimj96 · #10 03-15-2022, 11:33 AM

haha FAIL
'Dogbone' multiwrenches are for people that don't have a tool box, or any tools.
And nothing from China is "express" now,
except maybe fentanyl and government crack pipes.

BillGrissom · #11 03-15-2022, 12:29 PM

Quote:

Originally Posted by JHZR2

I agree ive never seen a lot of carbon when reaming with a tool or drill bit (7mm iirc?). I always vacuum out the holes though...

In my 1984 and 1985, I could see the interior of the pre-chambers when I had the injectors out (for compression test & pop-testing). There was no carbon in there and I could see the suspended balls. People have posted drawings which show that some pre-chambers are different, with a throat which makes viewing inside impossible. Perhaps those are the ones which collect carbon. My 1985 has a 1982 engine now, but don't recall seeing a throat in any of my 3 engines. Perhaps that throat was in 1970's engines. With injectors out, it was good to view the glowplugs to insure they all glowed at the tips, since some have the hot-spot in the middle where it does less good.