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Old 06-26-2010, 01:54 PM   #1 (permalink)
Diesel Michael
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MY glow plug adventure

It all started last saturday I decided I was going to go pull all my glow plugs to make sure they are all in good shape hoping to make it throught the summer so I could put a new set in at the beginning of winter.

So I start pulling 1-7 everything went fine now onto 2-8 everything started out fine except 2 wouldnt come out, so I move to the rest, they all came out fine. Well I figured that it was just carboned up on the electrode(happened alot before) so I go over to my toolbox, grab some Vice Grips and PB blaster, spray the glow plug, grab the hex part of the gp abd start working it arond gently , thinking I was breaking up the carbon I spray a little more and keep working, next thing I knew I was holding a broken gp in the vice grips in my hand!! the electrode had swollen

I look down and see the electrode is still in the head, I start figuring my options, I have the time and gaskets to pull the head but I dont wanna, so I figured I would do a bench test with a old 6.2 head I have which still had old gp's in it. so I go get it a bring it into my shop pull the plug break it the same way and stick it in the hole, and start looking around. it doesnt seem like the electrode could fall out of the pre combustion chamber and into the cylinder because of how long the electrode is, then I take another old gp and a pair of pliars and start smashing the electrode wondering if it did fall would the engine chew it up a spit it out the exaust.

I say screw that and get a new idea, grab a socket out of my box and pull the injector out of the bad head and what do you think I see? a perfect way to retrive the broken gp ,awesome, so I start by getting my Snap on 45* bent nose long handle needle nose pliars and a small punch and continue to try it on the bench first, with the electrode being so long I could push the broke end through the hole until it hit the head and then I could go in and grab it with my pliars and pull it out, so I walk over to my pickup, pull the injector, push the electrode through and grab it and pull it out , put a new gp in and re install the injector and fuel lines, everything is done!!

What should have taken me 30 min. ended up taking 1.5 hrs but it was easier then pulling the head. I hope this will help someone Thanks fro reading

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Old 06-26-2010, 02:19 PM   #2 (permalink)
4320Diesel
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this belongs in the FAQ for sure. should help TONS of people with swolen/busted glow plugs. good job

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your wrong brent, i'll think of a reason later

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brent can't do that, it would look factory, lol

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Brent is right.
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Old 06-26-2010, 02:34 PM   #3 (permalink)
Diesel Michael
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Thanks, I hope it will help someone
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Old 06-26-2010, 02:37 PM   #4 (permalink)
4320Diesel
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there, ive put it in the FAQ's. im sure it will help someone down the line.
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1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1998 Dodge Ram 2500 Sport club cab short box 4WD 5 speed 12 Valve cummins. Brentbilt fuel plate. 300 horse motorhome injectors, boost elbow, timing bumped to 18* autometer boost and pyro, 500 horse valair clutch waiting to go in!
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your wrong brent, i'll think of a reason later

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brent can't do that, it would look factory, lol

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Brent is right.
Was there any ever doubt?
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Old 06-26-2010, 06:25 PM   #5 (permalink)
blazerswampthing
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I have to wonder, how often does this swollen glow plug thing happen? I have 2 diesels and swapped all glow plugs and none had any problems coming out, very similar to spark plugs.
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Old 06-26-2010, 07:22 PM   #6 (permalink)
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happens when the old style plugs left left in a long time. i've never had an issue either
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well to make your pump retarded, you could let it hang out with me for a day
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Diaric wins thread derailment......
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Yeah Diaric, I gotta say, I'm afraid I'm going to have to give you an official warning on that.
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Old 06-26-2010, 09:15 PM   #7 (permalink)
Power_Auger
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GP Adventures

As a Complete newbie, never any experience with a Diesel, I had read about the swelling problem of the tips. In our first efforts of trying to get an old 2 year old Nester to fire, of course we had to pull the GPs. 1 was DOA. So we went to replace them all. 5 out of the 8 WERE stubborn! Yet with patience, Blaster, GENTLE wiggles, some cautious persausion, a sip or two of elixer for the patience, we were Lucky and got all the stubborn ones out. I am SURE only by luck, and no time pressures.

Thanks Diesel Michael, and Brent for putting the advice in the FAQ it will help! The new ones I put in were NOT what I wanted (my fault) and I have HEATED them UP. I have worried that I have to get the AC 60 G's in there before fall.
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Old 06-27-2010, 01:13 AM   #8 (permalink)
Diesel Michael
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Thanks guys and no problem, it was weird I have never had problems until this one and I do alot of 6.2 and 6.5 repairs, never had a swollen one before though
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Old 06-27-2010, 11:13 AM   #9 (permalink)
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i remember back when i first started on these engines i found alot of swollen plugs..but usually only on ones where the controller was bypassed
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Old 06-27-2010, 11:42 AM   #10 (permalink)
Fred482`
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I've had problems with lots of the original 9G's. The next gen, 11G's weren't much better. The latest gen 60G's don't seem to swell and the fact that they're similar to, if a PTC type, they last a lot longer.

The early ones were a problem. Quite a few engines swollowed a tip or two, exhibiting pock marked pistons, lots of small dents on the top. I did have one engine that suffered a hole in the piston from a glow plug tip. The indentation was clear when examined. A round dent, close to thearea under the prechamber. It was more of a three cornered crack than a hole.

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