Stumped witha collant leak.
May 17, 2023 | 01:23 PM
#1
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Stumped witha collant leak.
I have a 92 pickup with the 22re. I am leaking collant from somewhere. I have looked all over, it only leaks when driving. No puddles when sitting. And it's not in the oil. Any ideas would appreciated.
May 19, 2023 | 11:58 AM
#2
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Joined: Jul 2005
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From: Chiloquin, OR
One of the big coolant hose ends.
The Weep hole on the water pump.
One end of one of the small coolant hoses under the intake manifold.
The drain plug on the radiator. The cap of the radiator. One of the two hoses on the radiator. 4 hoses if you have an automatic transmission.
One of the coolant temperature sensors.
One of the intake/outflow hose connections on the heater core in the cabin. One of the connections of the heater hoses where they go through the firewall. If you have a rear seat heater, the piping going to or from the end of the engine compartment. The intake/outflow hose connections of the temperature control valve.
The recovery tank.
Around the rim of the thermostat. The hose connection on the thermostat.
Last but not least, the head gasket. Any white smoke coming from the tailpipe? Especiallly when first started?
Pretty much comes down to running the truck, and looking at everywhere the coolant flows once it's nice and warmed up. From what you said, it's going someplace. The main place to look, failing all the other stuff, is the head gasket. It will simply vanish if it's flowing into a cylinder when the truck is running. It gets heated to steam, and dumped out the exhaust pipe. Makes a real mystery as to where the coolant might be going.
I know it's not super helpful, but it's the best I can offer.
Pat☺
The Weep hole on the water pump.
One end of one of the small coolant hoses under the intake manifold.
The drain plug on the radiator. The cap of the radiator. One of the two hoses on the radiator. 4 hoses if you have an automatic transmission.
One of the coolant temperature sensors.
One of the intake/outflow hose connections on the heater core in the cabin. One of the connections of the heater hoses where they go through the firewall. If you have a rear seat heater, the piping going to or from the end of the engine compartment. The intake/outflow hose connections of the temperature control valve.
The recovery tank.
Around the rim of the thermostat. The hose connection on the thermostat.
Last but not least, the head gasket. Any white smoke coming from the tailpipe? Especiallly when first started?
Pretty much comes down to running the truck, and looking at everywhere the coolant flows once it's nice and warmed up. From what you said, it's going someplace. The main place to look, failing all the other stuff, is the head gasket. It will simply vanish if it's flowing into a cylinder when the truck is running. It gets heated to steam, and dumped out the exhaust pipe. Makes a real mystery as to where the coolant might be going.
I know it's not super helpful, but it's the best I can offer.
Pat☺
May 21, 2023 | 11:12 AM
#4
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Joined: Apr 2016
Posts: 1,583
Likes: 291
From: Alaska
This is just what they designed cooling system pressure testers for.
pressure up the system to the rating of your radiator cap and let it sit.
the coolant will go somewhere and you will eventually find it.
pull spark plugs and look for coolant puddling in one or more cylinders, turn over by hand with the plugs out and see if green stuff comes out.
See if the carpet is wet on the passenger side floorboard.
Do you smell the distinct sweet smell of coolant?
pressure up the system to the rating of your radiator cap and let it sit.
the coolant will go somewhere and you will eventually find it.
pull spark plugs and look for coolant puddling in one or more cylinders, turn over by hand with the plugs out and see if green stuff comes out.
See if the carpet is wet on the passenger side floorboard.
Do you smell the distinct sweet smell of coolant?
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