possible bhg
 

my friends supra has bubbles in his rad.(86.5 7mge standard)

not oil but bubbles.
and sometimes smells like antifreeze.
were changing both rad hoses, this weekend.

other than bubbles in rad there is no bhg indications. oil is ok.

could exhaust gases be forced through the hg into coolant and cause bubbles??

the car does not overheat, or overflow coolant.

They sell test kits that will tell u if ur hg is blown or not at auto stores

go to autozone and ask to rent a block test. It has a fluid that will change colors and indicate weather it is a bad hdg.

i was hoping to hear of someones past experience.

its not my car and i dont plan on getting my friends car block tested, or buy dye.
but thanks for the replys

dependds where it blows, on 22r's ive had this problem, and it was dumping the compression into the cooling system. best way to test is fill with just water and let it run. if the water smells like fuel, its bhg