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98 S10 4.3 I rebuilt top end of motor new head gaskets and all ,new radiator too . I put fresh oil in ran the motor for about ten min started tapping checked the oil and it was as low as the add mark no oil in reservoir but does blow out white smoke idk if it's because of the rebuild or condication need help .I also took apart the radiator to see the cooler in it and doesn't appear to have a hole so idk

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    Welcome to Motor Vehicle Maintenance & Repair! If you have white smoke present, you've still got head gasket problems. Did you reuse the old head bolts? Most modern engines use torque to yield bolts which it's pretty much required to throw them away and get a new set when replacing a head gasket. Either that or are you sure you put the right head gaskets on it? Did you check the heads to ensure they are straight? What was the reason for rebuilding the top end in the first place? – Pᴀᴜʟsᴛᴇʀ2 Dec 6 '19 at 10:41
  • It's not at all uncommon for oil to be forced into the cooling system when you have a problem with your head gasket, your cylinder head, or the engine block. Regardless, you'll need to pull the head again and find out what's wrong. – jwh20 Dec 6 '19 at 12:31
  • @Pᴀᴜʟsᴛᴇʀ2 that looks like an Answer. Why don´t you post it as such? – Daniel Dec 6 '19 at 14:39
  • @Daniel - Because it's a whole bunch of questions, not really an answer. The white smoke is only one part of the scenario here. I'd like to give a complete answer based on the whole picture. Besides, it really doesn't answer the question of why there's oil in the coolant. – Pᴀᴜʟsᴛᴇʀ2 Dec 6 '19 at 16:51
  • Ok well I ran the truck today and it's taping hard like someone hitting metal together hard anyway I don't think it's the heads there new gaskets and heads arnt cracked and torque to 75 ftlbs I think it's the oil pump but when it's running the motor acting like it has a big miss idk – James Daye Dec 7 '19 at 13:23

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