Antifreeze Water or coolant disappears help
10-01-2015, 12:23 PM
#1
Antifreeze Water or coolant disappears help
I have 98 Fl50 4.6 340k miles . I recently change intake gasket because I had a bad leak in heater pipe that runs under the manifold. Here is my issue I drive it 10 –25 miles a day everytime I check reserve tank it needs water I have to pour 2 gallons everyday or it will overheat on me. I have been looking for leak for 2 weeks now I can not find it. I put uv dye to nothing shows up, oil looks good, no white smoke and .no water inside floor . I do have a slight misfire on cylinder 2 that I have been try to fix only when warms up or under load. On that issue that may or may be related. New plugs. New wire, new coil, spark plug is not wet ,.
Any help would be greatly appreciated
Any help would be greatly appreciated
10-01-2015, 12:28 PM
#2
Mark
iTrader: (1)
You need to perform a cooling system pressure test... 2 gallons a day is a lot !! you will see it somewhere when the system is pressurized..
10-01-2015, 12:58 PM
#3
that is my next step i expected pressure will drop but might not show me were . I am leaning toward head gasket or crack head but it is running good and stronger then ever. Because looking for misfire i have replace pvc and all vacuum lines
10-01-2015, 07:54 PM
#4
test
i did the test took to 16 psi drop to 14 within a few min and held there. i found nothing so far . Should i put under presure and turn it on?
10-02-2015, 01:34 AM
#5
Rent a Block test kit from a parts store. It will show if there is exhaust gases in your coolant. If there is, head gaskets.
10-02-2015, 12:51 PM
#8
I change the oil just for the heck of it oil is clean no water. I will do head gasket test today. This truck is running so good and strong the ac on it is better then my cts you have to lower it because it will freeze you. I would just hate to part with this truck. if it turns out its the head gasket with 340k will it even be worth it?
10-02-2015, 02:54 PM
#9
I have 98 Fl50 4.6 340k miles . I recently change intake gasket because I had a bad leak in heater pipe that runs under the manifold. Here is my issue I drive it 10 –25 miles a day everytime I check reserve tank it needs water I have to pour 2 gallons everyday or it will overheat on me. I have been looking for leak for 2 weeks now I can not find it. I put uv dye to nothing shows up, oil looks good, no white smoke and .no water inside floor . I do have a slight misfire on cylinder 2 that I have been try to fix only when warms up or under load. On that issue that may or may be related. New plugs. New wire, new coil, spark plug is not wet ,.
Any help would be greatly appreciated
Any help would be greatly appreciated
10-02-2015, 02:57 PM
#10