Toyota 42-6FG25:
misses on startup after sitting overnite

this truck has a miss on startup after sitting all night, only lasts for a few seconds and then runs fine. another twist to this story is, it is losing coolant slowly, not leaking, no steam out of exhaust. pulled plugs in the morning before startup and looked in cylinders, one cylinder appears to be damp inside, turned motor over and there was no coolant sitting on piston. compression test showed that cylinder about 10 lbs. lower than others. also coolant is low in radiator, never in reservoir and operator says after sitting overnite radiator still has pressure in it when he removes cap. it appears to not be pulling coolant from reservoir when it gets low. any help greatly appreciated
  • Posted 4 Sep 2015 01:35
  • Discussion started by vic_s
  • Nebraska, United States
Showing items 1 - 3 of 3 results.
It's a little leak that puts moisture on the spark plug while parked but when it's running combustion gases go the other way into the coolant.
  • Posted 4 Sep 2015 06:10
  • Reply by mrfixit
  • New York, United States
that was what I was leaning toward, didn't want to do head gasket till I was sure. any idea why it doesn't pull coolant out of reservoir
  • Posted 4 Sep 2015 04:57
  • Reply by vic_s
  • Nebraska, United States
Been there, seen that, bad head gasket. Make sure the head is flat before installing it.
  • Posted 4 Sep 2015 02:35
  • Reply by mrfixit
  • New York, United States

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