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  #1  
Old 06-15-2004, 02:00 PM
Old Deis
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Glow plug wrench size?

I went out this morning and the beast would not start. Running late I did notice the glow plug light was not on. Interior lights would dim, but I am betting another glow plug has bought it.
Question is, my recall is the small glow plugs (81SD) use a 12mm wrench or socket wrench, and does Sears carry a 12mm 1/4 drive deep swivel? (assumming that is the correct size.)
I would like to get one of these asap.
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  #2  
Old 06-15-2004, 02:02 PM
123c
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I know the loop style glow plugs takes a 21mm wrench. I bought a set of ratcheting box end wrenches for this...
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  #3  
Old 06-15-2004, 02:04 PM
Old Deis
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That is what my 78 has, the 81 has much smaller glow plugs.
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  #4  
Old 06-15-2004, 03:04 PM
123c
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but I a guessing you can still use a 12mm ratcheting box end wrench on the pin style glow plugs ...
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  #5  
Old 06-15-2004, 09:41 PM
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Your SD has the same 617 engine that is in my '83 TD. the glowplugs are 12mm. I use a ratcheting "dogbone". There are a couple of plugs, I think #2 and 3 that you can get with a socket. However, for the rest there isn't enough room for a socket and ratchet. I have heard of people removing the fuel lines to get easier access. Personally, I would rather not disturb those lines.
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  #6  
Old 06-16-2004, 10:33 AM
Old Deis
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Found three glow plugs that were not functioning. Short life. The two rear ones were out of course. Those are the hardest to access.
Not so bad getting them out this time. When I last replaced them I used a little anti seize compound on the threads. Came out easily.
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  #7  
Old 06-16-2004, 02:36 PM
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Join Date: Sep 2001
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If you got really short life span out of them... you may need to check your injector spray pattern....
also... I think I saw somewhere on some of these engines... if the vacuum line lets oil be pulled back towards the top end it can cause things like precombustion chamber cracking... have no idea if that in any way could apply to your engine... but I read it in the FSM and wanted to tell SOMEONE about it... LOLOLOL
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  #8  
Old 06-16-2004, 05:04 PM
Old Deis
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Leather,
Interesting thoughts. I have a head from one of my parts engines in the shop now for a rebuild. Then it goes on the 81. They are going to pull all of the prechambers and check them over before the hot tank and the valve grind.
Maybe with a new head I will get some more life from these glow plugs. Not so good right now.
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