Engine overheating after coolant flush.
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New User
Joined: Jan 2007
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From: Oregon
Engine overheating after coolant flush.
Hi all
I have a 1991 Ford Aerostar that my wife and I have decided to keep forever....fingers crossed. Anyway, I had just flushed the coolant system after repairing a head gasket leak and now I get no rise in coolant tempature. Notice that the engine is getting warm but the water inlet hose to the engine is still cool to the touch.
Any Ideas?
thanx
I have a 1991 Ford Aerostar that my wife and I have decided to keep forever....fingers crossed. Anyway, I had just flushed the coolant system after repairing a head gasket leak and now I get no rise in coolant tempature. Notice that the engine is getting warm but the water inlet hose to the engine is still cool to the touch.
Any Ideas?
thanx
Elder User
Joined: Aug 2005
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You haven't really described a problem. This is winter and the radiator produces very good results as far as cooling goes. Does it overheat? After 10 minutes or so of running, the temp gauge should read normal. This is your indicator of cooling system health. If it overheats after the work you did, it might be the thermostat. Even new ones can be defective. Been there done that.
Do not rely on touch, use the gauge.
Ken
Do not rely on touch, use the gauge.
Ken
Postmaster
Joined: Sep 2003
Posts: 4,452
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From: Southern California
Hi Alexander:
Welcome to our FTE forum
What engine size do you have? 4.0L or 3.0L?
It seems you have air trapped in the system. To purge it, you need to leave the cap open on the first notch, run the engine until the thermostat opens up, turn on the heater and rev the engine at about 2000rpm for about 2 minutes or so.
You might have to refill the system and do this a few times to get rid of all the air. Also, your temperature sender might have gone bad on you. It's only about $5 at the local autoparts, so change that too.
Another thing is the water pump. Did you change it?
Welcome to our FTE forum
What engine size do you have? 4.0L or 3.0L?
It seems you have air trapped in the system. To purge it, you need to leave the cap open on the first notch, run the engine until the thermostat opens up, turn on the heater and rev the engine at about 2000rpm for about 2 minutes or so.
You might have to refill the system and do this a few times to get rid of all the air. Also, your temperature sender might have gone bad on you. It's only about $5 at the local autoparts, so change that too.
Another thing is the water pump. Did you change it?
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New User
Joined: Jan 2007
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From: Oregon
To Ken1 and all
Sorry for being so vauge. I had just installed a new waterpump when I noticed a leak coming from the head gasket.
I followed the proceedure for using stop-leak to fix the head gasket problem, then I refilled the radiator with coolant and ran the engine waiting for the thermostat to open. But instead of getting a normal reading from the temp guage I noticed the engine getting hot but the temp guage showing "cold". I am in the process of replacing the thermostat and will report back to you guys.
GMA
Sorry for being so vauge. I had just installed a new waterpump when I noticed a leak coming from the head gasket.
I followed the proceedure for using stop-leak to fix the head gasket problem, then I refilled the radiator with coolant and ran the engine waiting for the thermostat to open. But instead of getting a normal reading from the temp guage I noticed the engine getting hot but the temp guage showing "cold". I am in the process of replacing the thermostat and will report back to you guys.
GMA
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Post Fiend
Joined: Apr 2005
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From: Washington state
alexGM,
common problem using most of the stop leak goop in a can cooling system sealers....the goop hits an air pocket at the thermostat...does its thing and sets up into a gooey mess fouling thermostat opening or closing....yours was in closed position at time
anytime this stuff hits air, the catalyst is activated....heater cores with air pocket near top=plug up....sensor with air bubble=end of sensor...air bubble in high section of heater hose over engine=snot plug that is like an engine corinary looking for a place to plug up....
GM Sealant Tabs have been about the safest over the years for least amount of plugging problems...avail at many parts stores and of course GM dealers for twice the price
common problem using most of the stop leak goop in a can cooling system sealers....the goop hits an air pocket at the thermostat...does its thing and sets up into a gooey mess fouling thermostat opening or closing....yours was in closed position at time
anytime this stuff hits air, the catalyst is activated....heater cores with air pocket near top=plug up....sensor with air bubble=end of sensor...air bubble in high section of heater hose over engine=snot plug that is like an engine corinary looking for a place to plug up....
GM Sealant Tabs have been about the safest over the years for least amount of plugging problems...avail at many parts stores and of course GM dealers for twice the price
Last edited by 96_4wdr; Jan 5, 2007 at 05:33 PM.
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I really like those sealant tabs too. I put some of those in every engine I tear deep into because I don't want to go back and fix some stupid little coolant seep. It takes care of those very nicely. I have had only bad experiences and some really, really bad experiences with almost all of the other kinds. There just nothing like changing a heater core on your own time.......
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New User
Joined: Jan 2007
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From: Oregon
Best Forum ever and solved my problem
Hoorah!Problem solved guys! The old girl is back on the road and wife is mooie mooie happy.
Thanks to everyone here for the advice and I look forward to being an active member in the future.
No I am on to my next project,,,,My 1988 Ford Ranger rebuild!
Thanx Again
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Joined: Apr 2005
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From: Wichita
Originally Posted by AlexanderGM
Hoorah!Problem solved guys! The old girl is back on the road and wife is mooie mooie happy.
Thanks to everyone here for the advice and I look forward to being an active member in the future.
No I am on to my next project,,,,My 1988 Ford Ranger rebuild!
Thanx Again
Originally Posted by AlexanderGM
Not familiar with Sealant Tabs....What exactly are they?
MSDS Sheet
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New User
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From: Oregon
My solution to air bubble.
[QUOTE=VanGo]So what did you do to solve it?
I put the Van up on stands and opened up the radiator cap and she burpped like a baby. Filled the radiator with more coolant and waited about 15minutes. After hearing more air escaping from the radiator, I started the van and watched the Temp gauge. The temp guage got up to normal, I opened up the throttle to about 2200 RPM's with the heater on hign and everything worked as it should. Hot air flowing from the heater and no overheating after a short 20min drive.
I put the Van up on stands and opened up the radiator cap and she burpped like a baby. Filled the radiator with more coolant and waited about 15minutes. After hearing more air escaping from the radiator, I started the van and watched the Temp gauge. The temp guage got up to normal, I opened up the throttle to about 2200 RPM's with the heater on hign and everything worked as it should. Hot air flowing from the heater and no overheating after a short 20min drive.
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