Blown head gasket but no smoke

[guamboyeli]

Ok so every now and then I have to refill my radiator with coolant... It doesn't make any bubbles in the radiator, and the oil is the same hasn't mixed... No leaks and no smoke... Where/ what should I look at???

 

[Dsmkauai]

You need to get a coolant pressure tester and pump the system up. This should show your leak or Atleast give you a better idea. Have you done a compression test yet to see which cylinder the HG could have blown at?

 

[Rikolas]

Ok so every now and then I have to refill my radiator with coolant... It doesn't make any bubbles in the radiator, and the oil is the same hasn't mixed... No leaks and no smoke... Where/ what should I look at???

You are 100% there are no leaks and there isn't any smoke?

 

[RocCitySlayer]

Have you checked your radiator and bottom hose for holes or cracks?

 

[92AWDHX40]

Lots of places to leak coolant.

 

[curt-s]

Check around the core plugs, they can leak if there's improper coolant maintenance performed over the years.

 

[My1GLaser]

The coolant system pressure tester is a GREAT tool to rent. I have found many leaks over the years on all my vehicles that would have been a huge pain in the ass otherwise!

 

[guamboyeli]

thanks guys Ive totally forgot about the pressure tester... but yea... i ran the car in my garage for around 30 mins, drove it 10 miles, brought it back and nothing... no leak whats so ever.... unless someone is secretly stealing my coolant when im not around

 

[Rikolas]

It's possible that it's small hidden leak that the liquid burns before it reaches the ground. Give a real close look to all the hoses and close parts for signs of coolant.

 

[BogusSVO]

heater core would be my first guess.

If you have antifreeze in the system, drive the car and click the defrost on and fan on high.

If it is super minor, you will just have a sweet smell, if it is a bit more of a leak, the windshield will mist up on the inside.