Should we replace the glows plugs before trouble

jlgail4309 · **Posted:** Fri Oct 05, 2012 10:39 pm

I hear a few people having the factory glow plug break. Then fall and messing up the head. Mine seem to be working fine. Trying to replace anything that could cause trouble. Thanks for you help

EAB · **Joined:** Tue Sep 06, 2011 9:39 pm **Posts:** 141

I bought my 05 with a broken #2 piston. I pulled the #2 glow plug out and the end was gone. It may have been knocked off when the piston broke but I wouldn't doubt that the glow plug was the cause of the failure. The motor had 130K on it when it went belly up.

kjjet · **Posted:** Sat Oct 06, 2012 8:11 am

Wow...I would like to know if anyone else has had this issue? I know there is next to no room between the pistons and the head. I checked the clearance when i had the intake off. A piece of anything would for sure cause a failure. Mine are orginal and working fine.

MRausch82 · **Posted:** Sat Oct 06, 2012 8:56 am

I, too, have been wondering about this. Mine are also original at 80K. I have the Mopar updated kit to install them, but have been concerned about how they will work in the cold weather.

naturist · **Posted:** Sat Oct 06, 2012 9:45 am

My 2005 CRD still has the original ceramic glow plugs at 155,000 miles. When we had the head off to replace it after the head gasket blew and the head turned up with a crack about 5,000 miles ago, we had the chance to examine closely those glow plugs, and there was no evidence of any distress.

There are some things and circumstances it makes sense to replace pre-emptively. Filters, for example; a no brainer. When we had my head off, we also replace the timing belt and water pump which were only half-way through their expected life due to the labor costs of doing that job by itself.

At the other end of the spectrum would be the turbo. No way I'd replace it just because a handful of turbos have gone bad for others. The economics just aren't there.

Glow plugs are frankly closer to the turbo than filters. I did not replace mine and won't unless there's evidence one's gone bad.

But feel free to disagree and do what you want with YOUR vehicle.

jlgail4309 · **Posted:** Sat Oct 06, 2012 9:48 am

I'm thinking about the GX3123 Diesel Glow Plug 7V for Jeep Liberty
It works as a drop in replacement for the original ceramic glow plug, you can unscrew the old ceramic 7V and use this item without any other update. It doesn't require any flash or software update. It's made using steel sheated technology, it has been designed to replace original ceramic glow plugs.

ChooChooman74 · **Posted:** Sat Oct 06, 2012 9:54 am

I am in the middle of replacing my GP now, and it is NOT pretty. I had a CEL for #1 and #2, and I pulled them out. I hope I didn't break them, but I found pics online of GP from other engines and they look the same. They suggested on those forums to crank the engine by hand just to be sure. My luck, I opened a can of worms.... More to come

FYI, I am working on #3 and #4 now. Got them soaking in weasel piss. What a witch to take off the intake elbow. AND, it is nasty from the EGR, that was working for the PO. Looks like the PO put in a new EGR valve recently.

jlgail4309 · **Posted:** Sat Oct 06, 2012 9:57 am

naturist wrote:

My 2005 CRD still has the original ceramic glow plugs at 155,000 miles. When we had the head off to replace it after the head gasket blew and the head turned up with a crack about 5,000 miles ago, we had the chance to examine closely those glow plugs, and there was no evidence of any distress.

There are some things and circumstances it makes sense to replace pre-emptively. Filters, for example; a no brainer. When we had my head off, we also replace the timing belt and water pump which were only half-way through their expected life due to the labor costs of doing that job by itself.

At the other end of the spectrum would be the turbo. No way I'd replace it just because a handful of turbos have gone bad for others. The economics just aren't there.

Glow plugs are frankly closer to the turbo than filters. I did not replace mine and won't unless there's evidence one's gone bad.

But feel free to disagree and do what you want with YOUR vehicle.

I don't know enough to disagree. I thankful for all the help. I dont want to save a little time on a part and lose the head or the motor. To make a part last a little longer.
Im at 150800 on miles. I spend a little bet every year on my truck last year did timing belt. This year planning on what to replace in a 1000 price range.

ChooChooman74 · **Posted:** Sat Oct 06, 2012 10:10 am

#1,2,3. #4 is being a witch and won't break loose.

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ChooChooman74 · **Posted:** Sat Oct 06, 2012 10:19 am

Update. #4, using a small 1/4 in ratchet, snapped. Gotta call into the diesel mechanic. Gotta pull the head.

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flash7210 · **Posted:** Sat Oct 06, 2012 11:48 am

I'm at 110K miles and still on original glow plugs. Yes I worry about them but cold starting is never a problem for me ( I live in FL).

jlgail4309 · **Posted:** Sat Oct 06, 2012 12:40 pm

ChooChooman74 wrote:

Update. #4, using a small 1/4 in ratchet, snapped. Gotta call into the diesel mechanic. Gotta pull the head.

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Sorry to hear that. I've heard other people having problems getting them out. I'm thinking they should come out sooner than later. No more money than they cost. The 7 volt replacements our like 39.00 a glow plug. I see the pic's on the other 3. How did they look. They look like they would break.

jlgail4309 · **Posted:** Sat Oct 06, 2012 12:56 pm

If you wait till 200,000 miles and you can't get them out. That could be a high dollar problem. That might be something to think about. I'm going to start talking to my shop that did the timing belt. I would like to take the intake off and clean it at the same time do the glow plugs.
Or do we wait till the give me problem?

jlgail4309 · **Posted:** Sat Oct 06, 2012 1:03 pm

ChooChooman74 wrote:

Update. #4, using a small 1/4 in ratchet, snapped. Gotta call into the diesel mechanic. Gotta pull the head.

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How many miles do you have on your Jeep.

ChooChooman74 · **Posted:** Sat Oct 06, 2012 1:16 pm

jlgail4309 wrote:

ChooChooman74 wrote:

Update. #4, using a small 1/4 in ratchet, snapped. Gotta call into the diesel mechanic. Gotta pull the head.

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How many miles do you have on your Jeep.

89K on the ok. Realistic, more like 95K to 97K

kjjet · **Posted:** Sat Oct 06, 2012 3:12 pm

When i had my intake off i pulled and cleaned them. Reinstalled them with anti-seize. If i would known there was an issue i would have replaced. They must be tough to get to with the intake on.

ChooChooman74 · **Posted:** Sat Oct 06, 2012 4:27 pm

kjjet wrote:

When i had my intake off i pulled and cleaned them. Reinstalled them with anti-seize. If i would known there was an issue i would have replaced. They must be tough to get to with the intake on.

Gotta take the intake elbow off. Not the easiest thing to do.

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kjjet · **Posted:** Sat Oct 06, 2012 9:14 pm

The intake elbo can be trying. The lower foward bolt is not so easy. Plus there are two small bolts that holds the oil dip stick and the heater line to the EGR. Use 1/4 inch drive. Not so bad for my jeep due to i removed all the EGR, pluming and butterfly valve.

ColoradoCRD · **Joined:** Sun Dec 10, 2006 9:25 am **Posts:** 60

My glow plugs were showing a code, and continued to drive for awhile before I had a dealer do the replacement concurrent with the timing belt replacement. One of the plugs was seized during extraction, and I incurred the additional cost of the head removal and then repair at a machine shop.

The code started at about 90,000 miles, and the repair was done at about 100,000 miles. I had to use the block heater to start until it was repaired

I live in a very cold winter climate so my glow plugs work overtime which may account for the short service life. The problem with the extraction may be unrelated, however. This made me wonder if the plugs should be routinely replaced prior the expected service life in order to reduce the potential of seizure at the inevitable time of replacement?

jlgail4309 · **Posted:** Sun Oct 07, 2012 5:57 pm

ColoradoCRD wrote:

My glow plugs were showing a code, and continued to drive for awhile before I had a dealer do the replacement concurrent with the timing belt replacement. One of the plugs was seized during extraction, and I incurred the additional cost of the head removal and then repair at a machine shop.

The code started at about 90,000 miles, and the repair was done at about 100,000 miles. I had to use the block heater to start until it was repaired

I live in a very cold winter climate so my glow plugs work overtime which may account for the short service life. The problem with the extraction may be unrelated, however. This made me wonder if the plugs should be routinely replaced prior the expected service life in order to reduce the potential of seizure at the inevitable time of replacement?

I bet it was a lot more to replace with head removal. Between the potential of falling into the head and seizure. I betting mine will be seized up at 150800 miles on factory glow plugs. I believe I set aside more money just in case.

Should we replace the glows plugs before trouble

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