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  1. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    Well you were right I went back and plugged the hose to the surge tank again and the temperature came right up and after I had check the restrictor in the radiator it must be to large I put a shut off in the fill hose from radiator to surge tank. Now I can control the flow and it seam to be...
  2. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    I do live where we have winter and snow. Will need the heater to get hot. Thanks for your help.
  3. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    After reviewing all that I have done with cooling system I believe that the restr well with a remanufactured engine the rings and cylinder walls won’t wear and seat to each other and could cause the engine to use oil and have excess blow by. It is also to help with fuel mileage but sounds like...
  4. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    I have never run e85 in this engine not sure if it runs cooler.
  5. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    After the engine was replaced I would top off surge tank after each test drive( if needed) and I have put over 2k miles on sense this started. I also got a fill funnel that helped. See attached
  6. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    I will have it tested my pressure tester will not test that type of cap good idea. Thanks
  7. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    I did restrict the coolant hose from the radiator to surge tank and no change then I would try and restrict the return hose from the coolant surge tank to the water pump/ heater hose. Then started it up and let it run came right up to temperature about 197 degrees and then I drove it stayed...
  8. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    I was out looking at it today decided to replace the water pump again just to make sure it was not my issue. Still the same. Any ideas would be helpful.
  9. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    After checking the radiator it does have a restriction in the hose to the coolant tank. I am still checking for a fix for low coolant mine is 187 also must have typed wrong.
  10. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    After checking the radiator it does have a restriction in the hose to the coolant tank.
  11. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    I'm using a OBD scanner live data stream and the gage they are both reading very close to the same temp.
  12. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    I'm using a OBD scanner live data stream and the gage they are both reading very close to the same temp.
  13. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    i will give this a try and see what happens may take a day or two. Thanks for all you help this issue has been driving me crazy.
  14. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    The thermostat is the factory temperature from Chevy dealership. How can I check the restrictor in the hose? The upper and lower radiator hoses were replaced. Not not the hoses to the surge tank.
  15. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    I’m checking temp with obd scanner and gage both are close.
  16. M

    2006 Tahoe Cooling system running to cool. 5.3L Flex

    I got a 2006 Tahoe 5.3L flex that needed an engine. found a remanufactured (z code engine) had installed with new water pump, radiator and thermostat ( have replaced 3 times wit factory 178 degree stat). Now the engine runs about 165 to 175 on the road. When idling it will get up to about 210...

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