Coolant change = higher temp?

1642 Views 16 Replies 6 Participants Last post by 300se126, May 3, 2007

cjscopp

Discussion Starter · Apr 9, 2007

OK, feeling a little bit like an idiot here. Changed the two radiator hoses and the coolant last week and now have higher temp at idle and a slower cool down time while cruising. Used Pentosin coolant right at 50/50 but have noticed that while cruising temp is normal, right at 80c, at a stop the temp climbs rather quickly to right at 100 c and then when I take off it goes slowly back to 80c. Fans come on fine but I want to know what I did wrong with the coolant change to cause this because before old knucklehead (me) got his mitts on it it was fine, usually rock steady at 80c. Can air get trapped in this system and cause this? I let it run without the rad cap long enough after the thermostat opened but I wonder now. Any ideas? With hot Sacramento summer temps coming soon don't want to let the old girl get hot.

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jhodg5ck

· #3 · Apr 9, 2007

you know you have bleeder bolts on the drivers top of the block? You might try cracking them open as well.

Also, I like Pentosin oil but I know nothing of their coolant.. I also would have gone w/ a 30/70 coolant/water mix given where you live.

Jonathan

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jhodg5ck

· #5 · Apr 9, 2007

yeaa...alldata..not such a fan. There are two more bleeders on the head..you might want to try those as well.

Jonathan

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jhodg5ck

· #7 · Apr 10, 2007

Well, there are a few bolts on top of the engine that look as though they don't do anything...that's them. Just to the drivers side of the valve cover. Just turn things, if coolant comes out you found it..if not, you didn't.

Jonathan

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