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this is driving me nuts...I put a new t stat in a couple of months back because the housing was leaking so i figured why not. about 3 weeks ago it started running on the l on the normal side of the gauge. So this weekend i replaced the new radiator of my 88 and put it in this 85 (both have 4.9's). Filled it up and cruized down the road. Now my temp gauge is pegged on the aftermarket and fact. So i had my dad pick up a new t-stat just in case. R&R still didn't help any. When i was removing it i blew with ease into the top rad hose and the coolant came out the head no probs. This time when i came home i popped the hood and checked the hoses. Top one into rad is warm, can hold hand on for about 5-10 secs, bottom one is warm but not as hot as top. Heater hoses are same heat level as top rad. Both temp gauges are hooked up in the only possible place, right below exhaust manifold in the back passenger side of the head. I tried the aftermarket gauge where the ECT goes but it will only read 100F and nothing higher.....SO the fact gauge is pegged, and the aftermarket says it is about 300F....which is not possible because the damn block would be split open and there is no way that heater/rad hoses would be that cool. .....could this be a possible ground prob...which i can't beleive because it doesn't happen until it is warmed up doing 45mph or higher, in town it drops to about 190...i am just totally lost here....what the heck could of happened...i am thinking of going to my uncles because he has the little laser temp measurer and checking it out...there is just no way it could be running that hot though and no freaking steam.... :boxing :boxing :boxing :boxing :boxing :twak :twak :twak :twak
thanks for any suggestions guys/galz
thanks for any suggestions guys/galz