GC 1705 glow plugs

   / GC 1705 glow plugs #11  
Have not had issue with 8-10 second preheats on my GC 1715 but then again mild weather here all winter only got down to high 30's a few mornings...

Dale
 
   / GC 1705 glow plugs
  • Thread Starter
#12  
Yes I have, I had to make a tool to get them out of my 6.0 powerstroke. Nightmare.. I video a cold start after I change them.
 
   / GC 1705 glow plugs
  • Thread Starter
#13  
Have not had issue with 8-10 second preheats on my GC 1715 but then again mild weather here all winter only got down to high 30's a few mornings...

Dale
Youæ±*e plugs are working like they should.
 
   / GC 1705 glow plugs #14  
Your fluke test only has meaning if you know how many electrical terminals are on the end of your Glow Plug.

Most have a single terminal and rely on the connection to the block for a ground to complete the circuit.

Some glow plugs do not use the block for a ground and a very careful examination will show two independent electrical terminals on the end of the Glow plug.

These photos will show you how these terminals are arranged.

yk1Bk7p.jpg


0cNPtWP.jpg


Applying 12 volts to a GP removed from the engine is a good way to have it blow up in your face. Please treat them as the dangerous part they are.

This happens for two reasons. Normally they are supplied with around 10.5 volts because of the designed in series resistance of the glow plug indicator. Second, they very much rely on the heat transfer into the cylinder head to slow the rate of expansion of the internal resistance powders. Without contact with the head, the rate of temp rise can cause the insulating powers and the metal jacket around them to fail in an explosive type way.

Dave M7040
 
   / GC 1705 glow plugs #15  
The glow plugs in the ISEKI 3 cylinder in GC 1705 to 1720 series are are grounded in block and use a single busbar (connecting the three) to apply power to center terminal... And power (12 Volts) is applied directly from ignition switch....

Dale
 
   / GC 1705 glow plugs
  • Thread Starter
#16  
The glow plugs in the ISEKI 3 cylinder in GC 1705 to 1720 series are are grounded in block and use a single busbar (connecting the three) to apply power to center terminal... And power (12 Volts) is applied directly from ignition switch....

Dale

Yes, not much to it.
 
   / GC 1705 glow plugs #20  
Just BE SURE to check the length.. the thread size & voltage..
 

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