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Rough start question

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Old Aug 28, 2022 | 11:36 PM
  #1  
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From: Montana
Rough start question

I pulled one of these plugs out (pic below) to replace its o-ring to fix an oil leak, supper crappy start the next day, lots of cranking, tail pipe looked like a smoke machine. Finally got it started, ran fine. Started fine rest of the day.

I don't know what these plugs are, Walleye Hunter said in a previous thread he thought it was an hpop rail plug? Could my pulling this guy and the rough start have any correlation? Truck acted like it had no glow plugs, so that's the direction I'm heading, but seems like an odd coincidence so thought I'd check.

This is the tail pipe in between attempts to start. Haven't seen this before.

 
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Old Aug 29, 2022 | 12:24 AM
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From: Ponca City, OK
That is a high pressure oil port. There is 1 at each cylinder and all are interconnected. When you removed the plug you introduced air into the system. As a result you had a long crank and smokey rough performance until the air worked it's way out. Nothing to be concerned about, normal and expected anytime system is opened.
 
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Old Aug 29, 2022 | 07:06 AM
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Walleye Hunter
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udsuth sounds correct but if it continues, I'd check glow plug operation as the next step.
 
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Old Aug 29, 2022 | 08:53 AM
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Originally Posted by udsuth78
That is a high pressure oil port. There is 1 at each cylinder and all are interconnected. When you removed the plug you introduced air into the system. As a result you had a long crank and smokey rough performance until the air worked it's way out. Nothing to be concerned about, normal and expected anytime system is opened.
Thanks, I was all ready to take off work to fix the truck, looks like I'm headed in after all!
 
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Old Aug 29, 2022 | 09:34 AM
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From: Ponca City, OK
Originally Posted by Kintla
Thanks, I was all ready to take off work to fix the truck, looks like I'm headed in after all!
Whoops,... Uhhh... My bad. Should maybe work out a system in the future. You know pick your nose, adjust the downstairs, something common nobody would suspect.
 
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