1994 Ford F-150 4.9 cylinder. Several months ago I change the coolant had a mysterious red / orange coolant in there. Might have been Motorcraft but I'm pretty sure there was some Dexcool in there. Flushed it all out and replace with conventional green. Didn't have any sludge particles or anything else crazy during the flush, didn't seem excessively dirty. I did run one bottle of Prestone flush kit through there. I also replaced the radiator cap with a generic one from O'Reilly's. Also replaced thermostat to oem temp and a new housing.
I know that this is the first thing they tell me to do but I haven't ran into Diagnostics test yet. I've got a small coolant leak from the transmission cooler line fitting, also slightly leaking from around the thermostat housing which I did replace but I confessed to have done a rushed job so I'll do that again during my break.
Those are not the main problem. I have pressure buildup in the cooling systems that develops days after the engine has been off. The upper rad hose feels firm and when opening the cap a little bit sputters out. Of course this accentuates my leaks and the little puddle of coolant under my truck grows faster as the days goes go by the longer it's off. If I'm driving it daily I never see any leaking, but I haven't driven in about a week and a half and just open the cap today and cool and spotter.
I don't see any signs of oil in the coolant, or coolant in the oil or coolant coming out of the exhaust. I do have either an oil or coolant drip coming from the intake / exhaust manifold gasket which I plan on fixing during my break in the next couple weeks otherwise everything is running fine with no one apparent problems pointing towards this situation.
Wouldn't an exhaust gas leak not start showing up the days after the engine is off when there's no more exhaust gases being produced? Is it possible that my radiator cap is holding too much pressure, especially with wildly fluctuating Florida temperatures this time of year?
I know that this is the first thing they tell me to do but I haven't ran into Diagnostics test yet. I've got a small coolant leak from the transmission cooler line fitting, also slightly leaking from around the thermostat housing which I did replace but I confessed to have done a rushed job so I'll do that again during my break.
Those are not the main problem. I have pressure buildup in the cooling systems that develops days after the engine has been off. The upper rad hose feels firm and when opening the cap a little bit sputters out. Of course this accentuates my leaks and the little puddle of coolant under my truck grows faster as the days goes go by the longer it's off. If I'm driving it daily I never see any leaking, but I haven't driven in about a week and a half and just open the cap today and cool and spotter.
I don't see any signs of oil in the coolant, or coolant in the oil or coolant coming out of the exhaust. I do have either an oil or coolant drip coming from the intake / exhaust manifold gasket which I plan on fixing during my break in the next couple weeks otherwise everything is running fine with no one apparent problems pointing towards this situation.
Wouldn't an exhaust gas leak not start showing up the days after the engine is off when there's no more exhaust gases being produced? Is it possible that my radiator cap is holding too much pressure, especially with wildly fluctuating Florida temperatures this time of year?
