I have a rebuilt 5

Tiny
ANONYMOUS
  • MEMBER
  • 2005 DODGE RAM
I have a rebuilt 5.9 cummins and it blows frost plug when I step on it hard. Wondering what is cause.
Saturday, March 16th, 2013 AT 2:02 AM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
The core plugs are normally a very tight fit, so first I would ensure that the correct plug size is fitted, if you had a compression leak into the block with enough force to blow a core plug, I wold expect hoses to fail as well, and I would expect a misfire as well, normal cooling system pressure would not be enough to pop a plug it self under any circumstances, so ensure correct plugs are installed first.
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Saturday, March 16th, 2013 AT 3:12 AM

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