Discussion Starter · #1 ·
Here is a wierd one. 1986 yota 22r 4x2 long bed. Truck runs perfect, all new tune up, belts, hoses, thermo, valve cover gasket, pvc, fuel filter, etc. 113,000 miles. Would still get antifreeze leaking at the upper and lower rad hoses, so I kept tightening down the clamps, finally got it to where I had no more leaks. Then one day, I fire it up (it was cold) so high idle was on, and as it sat there idleing antifreeze drips from the upper rad hose where it goes into the thermo. So I tighten the clamp some more and it stops. I feel the hose, and it is rock hard. So I crack open the rad cap and get a puke of antifreeze and hose is soft again. After testing this for several days it does the same thing every morrning, pressure builds up at cold start up---then after it gets warm and the thermo opens the hosea are tight but not rock hard. I don't lose antifreeze except when I open the cap at start up. The truck does use about a quart of oil in 3000 miles. No oil in antifreeze. I do get a small amount of the milky goo under the oil filler cap. I think this is a very small head gasket leak pressurizing the rad and hoses that stops when the engine gets upto temp--due to exspansion! What do you guys think? Maybe do an oil analysis?