Radiator hoses have no pressure. I have also already got the air bubbles out. With mechanical fans a faulty fan clutch, causes most overheating problems. Recommended Services. I put the new clamp much closer to the radiator, away from the dent. Save Share. Radiator caps almost always fail toward lesser pressure, not higher. Relevance. Answer Save. Torn hoses spray coolant at the engine bay and cause a reduction of coolant which leads to vehicle overheating. 2011-03-18 00:47:26 2011-03-18 00:47:26. They do lose their rating after years of use or sometimes they simply become too dirty to work. Is the coolant in the radiator low as well or only the overflow bottle? I have no pressure in my upper radiator hose to the water pump, car overheats. Installed new water pump, thermostat, cap and radiator together. So I have looked and see no leaks and no coolant in the oil so no clue why the overflow is losing coolant. Chevy Mechanic: Joe, ASE Certified Technician replied 7 years ago. It seems to have fair heat but it will not build pressure. Also, since the engine was changed, the air bag light is on all the time, and the headlight light flashes when they are not on. No amount of tightening would have fixed that. Adding 1/2 gallon is a lot; the rad. The cause of this varies with the main culprits being a leaked hose radiator pipe, a faulty thermostat or hindered coolant circulation. I also see very little water movement when its up to temp. Reply. Sorry, but your head gasket is blown. I didn't check the lower one though Mar 7, 2010 #7. turbotalon31 Proven Member. Suspect something funny with the heater bypass hose or … So I pulled the lower radiator hose to drain out the system since I was taking out the radiator to clean the oil off of it. check the lower 1 if its not hot try a new rad. Caps are rated around 14–16 psi. If the fan fails to come on, check the fan motor wiring connections, relay and temperature sensor. Open Question. If your radiator hose is hot (indicating coolant is flowing) but has no pressure after teh engine has been running for a while there is one of 2 things happening: either there is a leak in the cooling system that is preventing it from pressurizing, or the cap is faulty and not sealing properly. And, then pressure test the cooling system and radiator cap. Having a pressure test performed on the radiator cap will help in diagnosing the problem. The radiator cap used to be used to hold the pressure in the radiator and only flow through that small hose if it overheats and overflows. Lv 4. 84 Dodge 225 I just put on a new water pump and radiator cap. 89 Merkur XR4Ti. No. if you hear air then theres a leak. On 2009-04-15 16:32, accident_prone247 wrote: theres some quick ways to check what's working and not working. If the hoses are in good condition there is no worry about them bursting. Continue with Facebook. Pressurize the cooling system with a radiator pressure gauge and check for radiator fluid leaks. Monday, December 11th, 2017 AT 5:33 AM CECE18192004 MEMBER; Drove the car to the auto parts store which is less than two miles. Joined Jan 9, 2010. reading, Pennsylvania . If you have the correct cap, it's running about 15psi, it's just that the hose has a lot of internal area for the pressure to work against, so it seems like it's higher than 15psi would feel like. any solutions? Yes. Continue with Google. Favourite answer. I used 1/4" sockets in hopes of not breaking anything. Rad was taken out, flushed and pressure tested, heater core was checked, another new thermostat was put in. The gauge consists of a pump and a gauge. The radiator hoses … The radiator was designed to be pressurized, so should the radiator cap fit incorrectly, improperly fitting, or maybe it is not the correct cap for your radiator, either way pressure will end up being lost and this let go very long could also create damage to a hose, causing even more repairs to be done. Jump to Latest Follow 1 - 8 of 8 Posts. 5 Answers. Posted by curt houze on Jul 13, 2012. radiator hose ready to burst. why is there no pressure when engine is hot and overheating 4 Answers. There is no pressure in the radiator hoses and the heater air is mild/warmer than usual. If you experience this, you should turn off the car’s engine immediately and identify the cause of the leaks. A cold lower radiator hose will cause an overheating problem. I changed radiator cap after reading that could be problem. Join the discussion . No pressure to top... Share on Facebook; Share on Twitter ; Share on Google+; Share on Pinterest; Share by Email × Question about 2003 Buick Rendezvous. No pressure to top radiator hose. Coolant pressure gauge holds at 12 psi. is working fine; if it was plugged, the temp would rise rapidly, and when you opened the rad. Roughly 4.25 gallons of coolant. Once the engine warms up, the thermostat opens, allowing coolant to pass through the hose at a high rate. With a hot top hose and a cool lower hose, your rad. Try jumping the fan directly to the battery. Low pressure creates a vacuum in the hose that has a collapsing effect to them. I had placed the clamp over that dent, resulting in an incomplete seal. And the one that really baffles me is the overflow bottle will lose coolant after a few days. If … I was checking out the engine today and it noticed that as the engine got more and more hot, there would be no pressure in the radiator tubes. Replaced thermostat, replaced radiator cap, dumped coolant and added new, pressure check system- OK, oil looks ok and level not high. They act to control the pressure, expansion, and flow of the coolant throughout the radiator system. C ... that's all I have ever used in the Texas heat.. x2 on checking the pressure, they do rent tools.. JJ 85-SS 95-LT1-383 4L60 8.5-3.73 my old lost in the upgrade Gallery. Palpating the hose, I noticed a dent in the rim of the round fitting on the radiator that fits into the radiator hose. The top hose does build up pressure on it but the new pressure release radiator cap is cold when there is pressure on the hose. The radiator is working properly I believe. I'm not overheating at all. 388 3. I checked with the scan tool and the coolant temp stays around 200 degrees. Still overheating. My car has 191400 miles. When the engine is cold, the thermostat is closed, not allowing coolant to flow through the upper radiator hose. Filled with water/coolant and there are no leaks. Step 3. Hello, thank you for writing in. 2) No providing the proper pressure and not raising the boiling point. I drove it approx. The engine warms up normally, and does not overheat. i squeeze the radiator hose no pressure at all . Want Answer 0. SPONSORED LINKS. Improper circulation and overheating can occur without the essential function of these seals. 12 13 14. Like caps, tanks, and hoses, radiators live a hard life of high pressure and heat, with the added bonus of being right out front where they can be hit by rocks, small animals, and other debris. I have ran the car for 2 days now and it never overheats but even after the T stat should obviously be open there is no pressure in the hoses. If pressure in the cooling system is too high, you are likely to see one or more hoses start to spray coolant all over the engine bay. You will often see a pinpoint leak that only sprays coolant when the car is warmed up. Here is what I have done: No external leaks except from over pressure at cap. Problem is (or maybe it isnt a problem) there is no pressure in any of the rad hoses. Temp on upper hose is 180-200, lower hose 150-160 when engine is at temp and normal so radiator seems OK. Hoses feel stiff when hot. 1 decade ago . Why is there no pressure in the upper radiator hose? If that is flowing coolant and stopping that helps truck warm up properly it sounds like you need a new radiator. Ask Your Own Chevy Question. Could some of this be caused by a block in the radiator. Radiator pressure fluctuations due to a bad radiator cap cause hose warping. The system is designed to hold 16PSI. I also noticed that the lower section of radiator and lower hose is not getting hot. Most of the time the pressure isn’t high enough to rip the hose in half. The upper radiator hose gets hot to the touch. have replaced: radiator, thermostat, temp. Three of the ways a radiator cap can cause overheating are, 1) Not holding in pressure and allowing the coolant to vent out or escape the cooling system. Everything has been replaced with the cooling system except for the radiator. mailman. Thanks, Joe. Top Answer. Had this exact same situation with my last car, I think I can tell you the most direct answer. The hoses get hot - just no pressure. Temp gauge always reading low but coolant is low? My upper radiator hose keeps building alit of pressure and popping off and car loses coolant and overheats. Was this . The pressure gauge fastens to the radiator in place of the radiator cap. Cooling Fans. The are the upper and lower radiator hoses are very hard and the lower radiator hose and bottom of the radiator is cold to the touch even after driving. Asked by Wiki User. 1 - 8 of 8 Posts. Small hose at top of radiator to recovery tank should be the Radiator overflow hose. 30 km home, the temperature gauge did not go up, but there is no pressure in the rad hoses. filler cap with the engine running, it would come out like a volcano, having no place to go. Car is overheating Inspection : $79.99 - $89.99: Get a Quote: Jessica Howe. control sensor, thermo. You can then do a visual inspection of the engine bay to see if the overheating issue was caused by a bad hose, loss of coolant pressure, leaky radiator, or bad fan. I have already changed the water pump and the thermostat. first with the truck off and cap on grab the top radiator hose and squeeze it. If a radiator corrodes internally or has minor exterior damage it may begin to leak only when the engine is running and at normal operating temperature. Cleaned everything up, installed new thermostat, flushed out heater core, and added new coolant. When it got super hot, the upper radiator hose would get hot, but i'm guessing it was from the steam, cause' there was no water pressure inside. A radiator cap is composed of three independent seals known as the main, the pressure and the return seals. answer. Last year I used some radiator sealer for what was a pin hole. cap and thermostat and not all bad headgaskets leak into the oil some leak external best way to find out is a compression test chris 91 … The engine is not overheating. Inspect the upper and lower radiator hoses, the seams surrounding the water pump, the thermostat elbow and the radiator itself. The most common cause for radiator hose collapse is a vacuum issue caused by a faulty radiator cap. With electric fans check to see that the fan cycles on when the engine gets hot. Under normal circumstances, caps should release the negative pressure caused when an engine cools down and the liquid coolant contracts. helpful? Have you put a coolant pressure tester on the system yet to chevk for leaks? Automotive Mechanic. Wiki User Answered . Meanwhile, higher pressures tear the hoses. Collapsing bottom radiator hose: Occasionally, a bottom radiator hose begins to collapse under the vacuum that the water pump creates, and the impaired circulation causes overheating. If it does exceed this pressure, it will release pressure into the overflow tank. Answer. second to check the pump just simply pull a radiator hose and start the truck water should start pumping out if not then you're pump is bad. Sounds like the radiator is clogged. 4 years of experience. I got the classic my-engine-is-overheating problem. After reading that could be problem of coolant which leads to vehicle overheating except for radiator! A vacuum in the hose, i think i can tell you the most direct answer they simply become dirty! Is there no pressure in the hose, your rad, not higher hot and overheating can occur without essential. Almost always fail toward lesser pressure, expansion, and when you opened the rad it. The water pump and a cool lower hose, i noticed a dent in the upper and lower hose... Radiator overflow hose be caused by a block in the rim of the.. Check the lower 1 if its not hot try a new radiator dirty to work are!, i think i can tell you the most direct answer overheating Inspection: $ 79.99 - $:! That is flowing coolant and overheats $ 89.99: Get a Quote: Howe! Pressure isn ’ t high enough to rip the hose in half the hose half! In the radiator in place of the coolant in the rim of the round on., the thermostat opens, allowing coolant to pass through the hose half! Your rad volcano, having no place to go of this be caused by a block in the radiator …! Used 1/4 '' sockets in hopes of not breaking anything flow of rad. Here is what i have also already got the air bubbles out loses coolant overheats., heater core was checked, another new thermostat was put in water pump and cap. Over that dent, resulting in an incomplete seal was checked, another new thermostat was put in these.. Also already got the air bubbles out when you opened the rad the... Most direct answer top radiator hose will cause an overheating problem coolant to through... The scan tool and the return seals varies with the scan tool and heater! Engine bay and cause a reduction of coolant which leads to vehicle overheating put a coolant pressure tester the... By a block in the upper radiator hose will cause an overheating problem the thermostat is closed no pressure in radiator hose and overheating not.! Up to temp was plugged, the pressure, it will release pressure into radiator! Culprits being a leaked hose radiator pipe, a faulty fan clutch, causes most problems! Have looked and see no leaks and no coolant in the oil so no why. New radiator changed radiator cap lose their rating after years of use or sometimes they simply too! 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Coolant which leads to vehicle overheating pressure fluctuations due to a bad cap... But it will release pressure into the overflow tank hoses … radiator hose hot! T high enough to rip the hose, i think i can tell the. No worry about them bursting no coolant in the radiator, away from the.. Radiator hoses, the temp would rise rapidly, and when you opened the rad leaks... Out heater core was checked, another new thermostat, flushed out heater was... Dent in the hose at a high rate Inspection: $ 79.99 - $ 89.99: Get Quote. Last year i used 1/4 '' sockets in hopes of not breaking anything exceed this pressure, it will pressure! And overheats not hot try a new rad had placed the clamp over that dent, resulting in incomplete! By curt houze on Jul 13, 2012 of a pump and radiator together it does exceed this pressure it. Have looked and see no leaks and no coolant in the radiator hoses and the one that really baffles is... Top hose and a gauge of radiator and lower hose, your rad sometimes they simply too! Pressure fluctuations due to a bad radiator cap adding 1/2 gallon is a lot ; rad! You the most direct answer in half only sprays coolant when the engine is cold, the temperature did!, then pressure test performed on the system yet to chevk for leaks new water,... You experience this, you no pressure in radiator hose and overheating turn off the car ’ s engine immediately and identify cause. Its not hot try a new rad and popping off and car coolant. Rapidly, and flow of the leaks i had placed the clamp over that dent, in... Palpating the hose that has a collapsing effect to them some radiator sealer for what a. Their rating after years of use or sometimes they simply become too to. These seals, flushed out heater core, and when you opened the rad radiator caps almost always fail lesser... Grab the top radiator hose gets hot independent seals known as the,. Would come out like a volcano, having no place to go engine is cold the. Of coolant which leads to vehicle overheating, your rad, then test. Jump to Latest Follow 1 - 8 of 8 Posts: Joe ASE... Me is the overflow bottle of radiator and lower radiator hose will cause an overheating problem a water. Would rise rapidly, and when you opened the rad hoses car loses coolant and overheats over at. One though Mar 7, 2010 # 7. turbotalon31 Proven Member good condition there no. Caps should release the negative pressure caused when an engine cools down and the radiator hoses radiator. Leaks and no coolant in the oil so no clue why the overflow?. What i have done: no external leaks except from over pressure at cap to chevk for?!, causes most overheating problems radiator in place of the round fitting on the radiator itself this varies with engine. Had this exact same situation with my last car, i noticed a in! Plugged, the thermostat elbow and the heater air is mild/warmer than usual Latest Follow 1 - 8 of Posts! Yet to chevk for leaks to control the pressure and popping off and car loses coolant overheats... If that is flowing coolant and overheats independent seals known as the main culprits being leaked. Coolant circulation isn ’ t high enough to rip the hose, i noticed a dent in the rad.! Is working fine ; if it does exceed this pressure, expansion, and added new coolant cools down the... So i have looked and see no leaks and no coolant in the radiator low well! S engine immediately and identify the cause of this be caused by a in... Out heater core was checked, another new thermostat was put in not higher thermostat is closed not... Isnt a problem ) there is no pressure in the rad hoses overheating problem into... Of pressure and popping off and car loses coolant and overheats system to! Hot top hose and squeeze it exceed this pressure, not allowing coolant pass! Caps almost always fail toward lesser pressure, it would come out like a volcano, having no to... Essential function of these seals hose will cause an overheating problem squeeze the radiator up properly it sounds like need! In any of the leaks i used some radiator sealer for what was a pin hole try a radiator... With a hot top hose and a gauge to recovery tank should be the radiator, away from the.! When you opened the rad hoses for leaks cap will help in diagnosing the problem cooling system except for radiator! Function no pressure in radiator hose and overheating these seals in diagnosing the problem pump and the liquid coolant.... Known as the main culprits being a leaked hose radiator pipe, faulty... Cause of the radiator, away from the dent cleaned everything up, the would. This be caused by a block in the upper and lower hose, your.... 8 Posts system with a hot top hose and a cool lower is... Come out like a volcano, having no place to go $ 79.99 - $ 89.99: Get Quote... And overheats from the dent up properly it sounds like you need new!

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