1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

pressure in coolant lines

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Old 01-05-03, 02:14 PM
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pressure in coolant lines

so i replaced my radiator last week, and the car is still overheating like crazy. so now on to the next step of trying to figure out the problem.

what type of pressure is supposed to be in the coolant lines?
Old 01-05-03, 02:48 PM
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i remember hearing 15psi or something in that range. Did you replace your thermostat? that could be the problem
Old 01-05-03, 03:00 PM
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when i squeezed the lines by hand (donot really have anything around to actually check the pressure) they felt soft as though perhaps there was not much in them.. but then again i never checked when everything was running right to know a difference.

stupid me. i forgot to check the thermostat when i had the radiator out.. now i need to go and drain the system again to be able to check it (but i do need to do that)
Old 01-05-03, 03:28 PM
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Well, you only have to drain enough to get at the termostat, its pretty high up there, so you won't have to get rid of much. How old are the hoses? mine are original and are really soft so that may be whats up with yours.
Old 01-05-03, 04:06 PM
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they are old..so that may be why they feel soft then..
hopefully i will have time later today to pull the thermo and test it..
Old 01-05-03, 11:58 PM
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For $4.95 from VB you might as well just replace it anyway. If your hoses feel really soft then you should replace them, I will be very soon on my car as you can pretty much collapse them (with the car running) by barely touching them and applying slight pressure. I assuem you are referring to the 79 in your profile, you might as well go ahead and replace all the hoses if you have the money and time too.
Old 01-06-03, 12:05 AM
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it is in the 79, but everything is from my old 80. but hat is still old.. i am going to look into replacing the thermostat. it is possible that i will do those as well. just depends on how long away pay day is (the 15th. so far away)
Old 01-06-03, 12:33 AM
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I know that all too well. All the hoses are pretty cheap except one, the bastard hose that goes from the the pipe under the plugs, around the back of teh engine and through the firewall into the heater. That ****** is like $45 what a rip. Oye, oh well, I bit the bullet and bought it figuring I won't have to worry about it for a long time. i hope......
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