Question about Ford Cars & Trucks
Had radiator and heater core flushed, fan works but it is still overheating and boiling and overfilling in the overflow. Could it be the thermostat?
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Posted on Jan 02, 2017
SOURCE: ford ranger truck overheating
You did let it run quite a while with heater on full while refilling the coolant to make sure all air bled out right? Well try it again with cap off, and rev the engine slightly once in a while for a few seconds, then let it idle again. Keep doing this as long as your gauge stays in normal range, Until you can see the flow increase in the rad, about 2 or 3 times at least. You'll see it flow faster when the thermostat opens. while watching it, keep an eye for bigger size bubbles, which indicates air obviously, but they should disappear or at least get very minimal after a while. Continuous larger bubbles, may indicate a bad head gasket, or cracked/warped head, or both. Let's not go there until we try the other though. Feel your rad hoses too, (squeeze them) especially your lower one, as it could be soft & spongy, and collapsing during driving & restricting the flow to the engine. If it feels weak at all, after all you've done, I'd do them too just to be sure, if they feel weak at all. Keep us posted
Posted on Dec 21, 2008
It appears we have an Air lock scenario and you will need to perform a system Bleed.
Park the vehicle on level ground, when cold remove coolant filler cap, start engine and leave to idle, turn heater on full and blower to max. When engine reaches operating temperature watch and listen near coolant filler, keep clear as gurgling and hopefully a boil over should occur. Top up with very warm coolant and wait as it may do it again.
Check for heat inside vehicle if warm replace coolant cap but keep an eye on temperature gauge as the ~Air lock may have moved on from heater matrix/core so proceedure needs to be carried out again from COLD.
If persistent boil ups/over attention must made in the cylinder head
or gasket area, or possibly water pump?
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Posted on Feb 05, 2009
allow the system to cool down
take radiator cap loose to release pressure
once pressure is released tighten cap
loosen clamps on the heater hoses in the engine compartment on the pass. side of firewall.
plug or cap off the heater core tubes to prevent spillage when you pull it into the truck
place a trash bag on floorboard in case spillage occurs
remove the five screws holding the heatre core access cover, three on top and two on bottom
carefully pull heater core back and down and remove it from the dash
install is reverse
Hope this helps
Posted on Mar 29, 2009
You might have to purge the coolent system cause when you change stuff like that you normally have to bleed the the colent system. So what you have to do is run the car untill your temp gets to 195 degrees the cut the car off and let the coolent drain down and then refill and geep doing that untill you have heat.
Posted on Jan 09, 2010
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