Mactheplumber
New Member
- Joined
- Nov 26, 2017
- Messages
- 6
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1994
- Make / Model
- Ford
- Transmission
- Manual
94 4.0 manual w/ac.
Okay so I can't figure out why my truck is doing this. But here's what it's doing. At idle is where I notice it. So after it warms up, and it runs for a bit the temp gauge starts going from the L in normal, then drops down to a little before the N on normal. And it appears when it's reading on the cooler side of things, the engine will start kinda thumping/bumping.
But then when the gauge starts to climb the noise stops. But, if I kill it when it's bumping, it keeps bumping. Maybe for a minute or so.
So here's what I've done. New radiator cap with the red safety release. New thermostat. I took when I replaced the thermostat and ran a water hose through the upper radiator hose hoping to flush out any air bubbles. But, the bottom radiator hose was disconnected so might not have did a good job.
Do you guys think I need to replace the heater core, radiator, or possibly water pump? Only had the truck a few months now. And just so I know, the water pump pushes water through the lower radiator hose correct?
Okay so I can't figure out why my truck is doing this. But here's what it's doing. At idle is where I notice it. So after it warms up, and it runs for a bit the temp gauge starts going from the L in normal, then drops down to a little before the N on normal. And it appears when it's reading on the cooler side of things, the engine will start kinda thumping/bumping.
But then when the gauge starts to climb the noise stops. But, if I kill it when it's bumping, it keeps bumping. Maybe for a minute or so.
So here's what I've done. New radiator cap with the red safety release. New thermostat. I took when I replaced the thermostat and ran a water hose through the upper radiator hose hoping to flush out any air bubbles. But, the bottom radiator hose was disconnected so might not have did a good job.
Do you guys think I need to replace the heater core, radiator, or possibly water pump? Only had the truck a few months now. And just so I know, the water pump pushes water through the lower radiator hose correct?