bad glow plugs
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Freshman User
Joined: Jan 2010
Posts: 47
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From: Clarksville, TN
bad glow plugs
I got my return fuel line in yesterday, along with my viton O-rings, and I just ordered my Beru's today, so I decided to take a look at the old ones. I can't even tell what brand they are! Luckily none were swollen up, but all of them had the ends burn/blown off. Is it safe to assume that those "missing" pieces were incinerated? Or are they now floating around somewhere where they shouldn't be?
Postmaster
Joined: Apr 2009
Posts: 4,086
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From: Malahat/Cowichan Valley
dude you gotta post pics, i would be hard pressed to believe that your truck ate 8 GP's and is still alive! That would mean it was running waaaaaayyyy friggin hot or it was successful in crapping them out the pipe! hahaha
Senior User
Joined: Feb 2006
Posts: 244
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From: Texas
Good thing you dont have a turbo, it would have eaten them, lol! Probably went out the exhaust long ago. I would like to see pics as well. My poor '87 has been abused by previous owners, I am scared to look at the glow plugs!
Last edited by 64F260; Mar 10, 2010 at 01:42 PM. Reason: typo
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Freshman User
Joined: Jan 2010
Posts: 47
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From: Clarksville, TN
Not the best pictures, but all 8 off them looked just like this! When my new ones come in I'll try to get a comparison picture. Hopefully all the bits got blown out of the exhaust. Since I have owned this truck, I have not had it running, so I'm guessing that this had a lot to do with the PO's hard starting issues!
One more thing. My glow plug light in the cab would stay on for about 8-10 seconds before going off, and I could hear clicking coming from the engine compartment. Does that mean that the glow plugs were still working? Or is the gp controller of relay shot? Thanks!
Last edited by Dislexiq; Mar 10, 2010 at 02:06 PM. Reason: just because
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From: Texas
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Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
Remember the 85 glow plug system likes to fail with the glow plugs turned on.
And the location of the wait to start light is not easy to see while driving during the daylight hours.
So it you were driving, plus the glow plugs were on while driving, the tips melted.
And the location of the wait to start light is not easy to see while driving during the daylight hours.
So it you were driving, plus the glow plugs were on while driving, the tips melted.
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Senior User
Joined: Nov 2009
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I was wondering what effect broken tips and any dimples in the top of the piston would do to compression numbers?
If you have good numbers and it runs ok and lets say you passed the tips or burned them up. Would you expect to see pits, etc. on the top of the pistons if you were to pull apart an engine?
If you have good numbers and it runs ok and lets say you passed the tips or burned them up. Would you expect to see pits, etc. on the top of the pistons if you were to pull apart an engine?
Laughing Gas
Joined: Feb 2010
Posts: 859
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From: Port Orchard, WA
Well point as you may have, that seems a little rude.
Elder User
Joined: Mar 2008
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From: Marianna, Florida USA
Sorry, I guess that was a little off color, I apologize for stepping on anyone toes. The fact is that if a temperature limiting GP was in there it would not have melted. The battery would have been dead when you try to start it after it stuck on, but the GPs would not have burned up. I left my switch on for a 6 mile trip in to work once. When I came out my battery was dead as a doornail. After a jump start, it worked fine.
Post Fiend
Joined: Oct 2007
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From: Faibanks Ak.
OK I don't have any proof but i have heard that if your timing is advanced to far it will burn the tips off the glowplugs, and dyuong said that when he was playing with the timing advanced as far as he could get it he burned a set plumb off.