Glow plug replacement torque
#1
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1999 e300td
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Just finished replacing all 6 on my 99 E300td, cleaned out the chambers with a gun brush
and was amazed at the carbon that came out with the siphon gun. Blew all back through the intakes, shop-vac'd everything and we're back in business.. BTW: the 3/8 impact gun at low power was THE answer!
BUT.. any recommendations on the torque specs? Bottom-out and 1/4 turn or 12-15 ft/lb like a spark plug in an alu. head?
You guys have been a tremendous aid so far, we'll try to post some pics later of the job. Not bad for the average mechanicaly inclined person with a few common tools. Full write up to come if there is interest.
![EEK!](https://mbworld.org/forums/images/smilies/eek.gif)
BUT.. any recommendations on the torque specs? Bottom-out and 1/4 turn or 12-15 ft/lb like a spark plug in an alu. head?
You guys have been a tremendous aid so far, we'll try to post some pics later of the job. Not bad for the average mechanicaly inclined person with a few common tools. Full write up to come if there is interest.
#2
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2006 E320 CDi, 2008 3/4 Ton Suburban, 2007 "rice rickshaw" Accord 5 speed
Just finished replacing all 6 on my 99 E300td, cleaned out the chambers with a gun brush
and was amazed at the carbon that came out with the siphon gun. Blew all back through the intakes, shop-vac'd everything and we're back in business.. BTW: the 3/8 impact gun at low power was THE answer!
BUT.. any recommendations on the torque specs? Bottom-out and 1/4 turn or 12-15 ft/lb like a spark plug in an alu. head?
You guys have been a tremendous aid so far, we'll try to post some pics later of the job. Not bad for the average mechanicaly inclined person with a few common tools. Full write up to come if there is interest.
![EEK!](https://mbworld.org/forums/images/smilies/eek.gif)
BUT.. any recommendations on the torque specs? Bottom-out and 1/4 turn or 12-15 ft/lb like a spark plug in an alu. head?
You guys have been a tremendous aid so far, we'll try to post some pics later of the job. Not bad for the average mechanicaly inclined person with a few common tools. Full write up to come if there is interest.
#3
I have cleaned a lot of carbon out when replacing glow plugs, although from what I remember there is a special reaming tool that will get all the carbon out. I hope the gun brush will too, although the reaming tool seems to be a bit better suited for removing the carbon.
#5
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You might want to use some antiseize on the threads and shaft of the GP too. Most DIYer's use it when they replace them. I dont thnk MB has ever come out and recommended it.
Beru makes a special grease they recommend for their GP's as well.
Beru makes a special grease they recommend for their GP's as well.
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1999 e300td
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Thank you for the info. upon default I torqued to 150 in.lb.. so feel OK about that. Anti-seized the threads, reset the OBD2, and no check engine light,
I still have a bit of a one cylindered miss at cold start,?? Was their a opportunity when all the GP's were out to do a compression check? I suspect so,
and do any of you know the compression, my gauge tops out at 300#.Will probably be back in this weekend to meter the GP's again, and see if not reaming has shorted one out.
I still have a bit of a one cylindered miss at cold start,?? Was their a opportunity when all the GP's were out to do a compression check? I suspect so,
and do any of you know the compression, my gauge tops out at 300#.Will probably be back in this weekend to meter the GP's again, and see if not reaming has shorted one out.
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1999 e300td
Inpact gun?? YES ("3/8")
Started out very cautious but soon felt comfortable at full flow, (125#) at regulator. Using my left hand on a 8" extension to modify the initial shock. As movement was observed, reversing and reversing oiling[(KANO-KROIL) or PB blaster or similar lubricant]. and yes every one came out,confidence builder with every one. 3/4 length socket works extremely well, It rides the glow plug out, were a common deep well socket allows the glow plug to ride out, with in the socket and damaging the threads on the GP on the way.
Last edited by gflatt; 10-29-2008 at 04:15 PM.