Jump to Latest Follow 1 - 8 of 8 Posts. maybe its closer to 60/40. no heat. I have a 1991 Ford Ranger 2.9,and I am having a heat problem I did change the thermostat but no heat yet,this is what I found so far. Mysterious honda civic 2002 overheating some time. forgot to mention the top radiator hose feels hard but not too hard. ... With a hot top hose and a cool lower hose, your rad. change radiator, hoses, and flushed heater core. Don't understand why the bottom hose is cool when the heater will run you out of the car. No bubbles in overflow tank. Upper radiator hose hot, lower hose cold. Both top hoses are hot, the bottom one is barely warm. Nov 11, 2010 ... and the upper radiator is hot while the lower hose is cold, the thermostat could be stuck. I do not see a weep hole on the water pump but I am not loosing any antifreeze. Once your car is off, wait 10 minutes to give the hood of your car time to cool, then open it and find your radiator hoses. sometimes it reaches -20 degrees here thats why i mixed the coolant that way. There is a primary and secondary. Tech Archive (No Posting) ... i have a d16 and my lower hose is always cold i think, but upper is hot . I ran the thing for 15 min with the cap off, and all that happened was coolant expanded and overflowed filler neck. During warmup, the closed thermostat PREVENTS engine coolant from circulating through the radiator. Using your finger, carefully touch the top and bottom radiator hoses for a couple of seconds. engine not over heat … read more Ask Question Asked 5 years ago. 5+ Year Member. Drivers side of motor, follow the upper radiator hose to a VERY VERY STUPID plastic housing that has both Tstats in it. I would look at that first in my opinion. Brent b3 ... Engine discharges hot antifreeze using the top hose and draws cool antifreeze from the bottom hose. the 2 hoses running to the heater core are hot. so as long as i dont overheat everything is normal? seems like the thermostat is not opening.but im not overheating. Mishimoto Product Manufacturer. the bottom hose is just cold is that normal? When you do this get a new O-ring for the inlet from the water pump. It will need replacing. If your radiators are cold at the bottom but hot at the top, this can only mean that the flow of hot water is somehow being restricted or redirected so it’s not reaching the whole of the radiator. https://rustyautos.com/top-radiator-hose-supposed-to-be-hot bottom radiator hose from engine to radiator cool top hose hot. Depending on how long the engine has been running and whether the thermostat is fully open or closed, the top hose will feel hot and the bottom cold. If one is very hot and the other is cool, your car’s thermostat is likely stuck in the closed position. The engine temp gauge is at the middle, so I guess nothing is overheating. I went to a garage to do a compressor and fluid test, which were all negative . Honda Civic Gen Tech and Builds / Show Offs. My lower radiator hose had always stayed cold and I thought my t-stat stuck closed so I ordered a new t-stat from pelicanparts and had it replaced. I checked top radiator and its hot,the bottom hose on radiator is cold. Remove the upper rad hose and there are 3 10mm bolts holding the assembly on the head. Customer: ***** ***** just changed mot0r 2007 2.4 accord.
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