engine problem's, i'm baffled on this 5.4.. please help.
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Elder User
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From: effort,pa
engine problem's, i'm baffled on this 5.4.. please help.
well i am fixing my 01 f-150 4x4 5.4 truck. it has 151,000 on it and two days ago stopped making heat, just like that from one day to the next no heat. i checked the coolant and it had blew a bunch of it out from under the cap.. i checked evey book i had, and this site and from what i found on this site it could have been a pinhole leak in the head gasket, one member reconmended bars head gasket repair. i bought some today..
this is what i did, drained the system and flushed it twice to get all the anti-freeze out. replaced the t-that and put the gaket repair in with strait water folowing the instruction's as not to screw it up.. i started it and ran it for the perscribed time and it never made heat, finaly the gauge started to climb slowly to almost the top but it never made heat, the rasdiater hose never got hot and the heater hoses never got hot. however it did blow a **** load of water out from under the cap again.. anyone ever had this exact problem, i'm stumped. i figure it could be a leaking had gaket, but why no heat??
this is what i did, drained the system and flushed it twice to get all the anti-freeze out. replaced the t-that and put the gaket repair in with strait water folowing the instruction's as not to screw it up.. i started it and ran it for the perscribed time and it never made heat, finaly the gauge started to climb slowly to almost the top but it never made heat, the rasdiater hose never got hot and the heater hoses never got hot. however it did blow a **** load of water out from under the cap again.. anyone ever had this exact problem, i'm stumped. i figure it could be a leaking had gaket, but why no heat??
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From: sanford
i started it and ran it for the perscribed time and it never made heat, finaly the gauge started to climb slowly to almost the top but it never made heat, the rasdiater hose never got hot and the heater hoses never got hot. however it did blow a **** load of water out from under the cap again..
Sounds more like the water is not circulating. Plugged system,bad pump. Fill the rad. but just hi enuf so you can see the flow tubes at the top.Leave the cap off and run the truck,After it warm up enuf you should be able to see if the pump is working because you will see the water flowing in the radiator
If you have water blowing out the cap it could be bad.Or it is boiling over because there is no cooling of the engine
Sounds more like the water is not circulating. Plugged system,bad pump. Fill the rad. but just hi enuf so you can see the flow tubes at the top.Leave the cap off and run the truck,After it warm up enuf you should be able to see if the pump is working because you will see the water flowing in the radiator
If you have water blowing out the cap it could be bad.Or it is boiling over because there is no cooling of the engine
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Joined: Sep 2006
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Obviously no coolant is circulateing.
I have seen radiators that were plugged in their lower quarter such that no coolant of any reasonable volume could flow and the block overheats.
The thrermostat is located down low in the lower hose.
Take the system apart and check flow and replace the thermostat.
Open the drain valve first. If very little come comes out with the fill cap off, the radiator is plugged.
If a head gasket were blown, I doubt it would result in a cold heater up until the time the coolant is blown too low to circuiate and causes high pressures.
I have seen radiators that were plugged in their lower quarter such that no coolant of any reasonable volume could flow and the block overheats.
The thrermostat is located down low in the lower hose.
Take the system apart and check flow and replace the thermostat.
Open the drain valve first. If very little come comes out with the fill cap off, the radiator is plugged.
If a head gasket were blown, I doubt it would result in a cold heater up until the time the coolant is blown too low to circuiate and causes high pressures.
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From: effort,pa
i fixed it that same day, it turned out to be a bad pressure cap, the system would build a little pressure then the cap would push it out over the top.. pissed me off, i never geussed that woulda just pucked out so i jumped rite to bigger problems, like a bad head gasket.
