Overheating

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Overheating

Home > Discussion Forum > Mechanic's Corner - Engines

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All Messages in Thread	Author	Date
Overheating	Ray Leslie	6-27-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks
Re: Overheating	Jmerritt	6-28-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John
Re: Overheating	Jmerritt	6-28-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John
Re: Overheating	Ray...	6-28-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John John... yes, the radiator was a used one, but it's a (dodge) 318, not the 440. My only choices for a thermostat are 195 or 180, and I've tried both. However, I do agree with your assessment. I just can't see it being anything but a waterflow problem inside the radiator. But since I have been ~~once or twice, lol~~ wrong before, I wanted a second opinion. Thanks!
Re: Overheating	Ray...	6-28-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John John... yes, the radiator was a used one, but it's a (dodge) 318, not the 440. My only choices for a thermostat are 195 or 180, and I've tried both. However, I do agree with your assessment. I just can't see it being anything but a waterflow problem inside the radiator. But since I have been ~~once or twice, lol~~ wrong before, I wanted a second opinion. Thanks!
Re: Overheating	Jmerritt	6-29-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John John... yes, the radiator was a used one, but it's a (dodge) 318, not the 440. My only choices for a thermostat are 195 or 180, and I've tried both. However, I do agree with your assessment. I just can't see it being anything but a waterflow problem inside the radiator. But since I have been ~~once or twice, lol~~ wrong before, I wanted a second opinion. Thanks! Ray, I would still check with Chrysler on the part number for the the thermostat, may be the same deal for your motor as it is for the 440. Autozone, Pep Boys, etc., might not have the info on special applications specific to truck use, towing, etc. John
Re: Overheating	Jmerritt	6-29-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John John... yes, the radiator was a used one, but it's a (dodge) 318, not the 440. My only choices for a thermostat are 195 or 180, and I've tried both. However, I do agree with your assessment. I just can't see it being anything but a waterflow problem inside the radiator. But since I have been ~~once or twice, lol~~ wrong before, I wanted a second opinion. Thanks! Ray, I would still check with Chrysler on the part number for the the thermostat, may be the same deal for your motor as it is for the 440. Autozone, Pep Boys, etc., might not have the info on special applications specific to truck use, towing, etc. John
Re: Overheating	Rick Herlihy	7-5-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John John... yes, the radiator was a used one, but it's a (dodge) 318, not the 440. My only choices for a thermostat are 195 or 180, and I've tried both. However, I do agree with your assessment. I just can't see it being anything but a waterflow problem inside the radiator. But since I have been ~~once or twice, lol~~ wrong before, I wanted a second opinion. Thanks! Ray, I would still check with Chrysler on the part number for the the thermostat, may be the same deal for your motor as it is for the 440. Autozone, Pep Boys, etc., might not have the info on special applications specific to truck use, towing, etc. John
Re: Overheating	Rick Herlihy	7-5-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John John... yes, the radiator was a used one, but it's a (dodge) 318, not the 440. My only choices for a thermostat are 195 or 180, and I've tried both. However, I do agree with your assessment. I just can't see it being anything but a waterflow problem inside the radiator. But since I have been ~~once or twice, lol~~ wrong before, I wanted a second opinion. Thanks! Ray, I would still check with Chrysler on the part number for the the thermostat, may be the same deal for your motor as it is for the 440. Autozone, Pep Boys, etc., might not have the info on special applications specific to truck use, towing, etc. John
Re: Overheating	Rick Herlihy	7-5-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John John... yes, the radiator was a used one, but it's a (dodge) 318, not the 440. My only choices for a thermostat are 195 or 180, and I've tried both. However, I do agree with your assessment. I just can't see it being anything but a waterflow problem inside the radiator. But since I have been ~~once or twice, lol~~ wrong before, I wanted a second opinion. Thanks! Ray, I would still check with Chrysler on the part number for the the thermostat, may be the same deal for your motor as it is for the 440. Autozone, Pep Boys, etc., might not have the info on special applications specific to truck use, towing, etc. John Sorry about the blank post! Check the bottom radiator hose. If the srping is missing the hose might be collapsing at high engine rpm. Rick
Re: Overheating	Rick Herlihy	7-5-01
On my 73 Winnebago Brave, the radiator split a seam 'way out in the desert. Had it towed home, replaced radiator, saw a few small fins leaking, added some stop-leak which seemed to fix it. Tested on freeway, found it over-heated. Noticed it would work fine if I kept my speed no more than 55, figured water pump was beginning to fail. replaced pump & put in 180 thermostat. Tested again, same results. Over-heated unless I kept it below 55. Works perfectly below that speed. The replacement radiator was used, and I suspect it may have a partial clog. Can anyone suggest either another possibility or a way to confirm a partial clog? I know I can have the radiator checked out, but for even less I can totally replace it, but I don't want to spend the summer pulling radiators, lol. Can anyone help?? Thanks Ray, Sounds like you replaced the radiator with a used one. With fins leaking I would bet the radiator needs to be recored and you aren't circulating coolant properly. I am assuming that you have a Dodge chassis. If you do you might want to check the thermostat that you installed because I understand that Dodge for the 440 motor has two, one has a larger opening. If you have the smaller one it can cause the unit to run hot, especially at higher speeds since it reduces coolant flow. Check with your local Chrysler dealer and get the right thermostat. John John... yes, the radiator was a used one, but it's a (dodge) 318, not the 440. My only choices for a thermostat are 195 or 180, and I've tried both. However, I do agree with your assessment. I just can't see it being anything but a waterflow problem inside the radiator. But since I have been ~~once or twice, lol~~ wrong before, I wanted a second opinion. Thanks! Ray, I would still check with Chrysler on the part number for the the thermostat, may be the same deal for your motor as it is for the 440. Autozone, Pep Boys, etc., might not have the info on special applications specific to truck use, towing, etc. John Sorry about the blank post! Check the bottom radiator hose. If the srping is missing the hose might be collapsing at high engine rpm. Rick