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Dan
Dan, Technician
Category: Ford
Satisfied Customers: 23590
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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1999 ford ranger coolant goes to reservoir when it gets hot

Customer Question

1999 ford ranger coolant goes to reservoir when it gets hot but doesn't return when it cools down???
Submitted: 1 year ago.
Category: Ford
Expert:  Dan replied 1 year ago.

Hello, my name is***** vehicle overheating? What size engine do you have? Thanks.

Customer: replied 1 year ago.
No overheating but heat is intermittent hot then cold hot then cold! New thermostat new temp sending unit
Expert:  Dan replied 1 year ago.

I'd replace radiator cap, if it is sticking it will open too easily causing coolant to push into overflow tank and pressure to drop. Let me know how it goes or if you have more questions, thanks.

Customer: replied 1 year ago.
3.0. Has new radiator cap also
Expert:  Dan replied 1 year ago.

Have you checked to see if there is air bubbles coming up through coolant with cap off and engine cold?

Customer: replied 1 year ago.
There are a few yes
Expert:  Dan replied 1 year ago.
That would point toward head gasket failure. This can only happen if system is overpressure due to head gasket or if radiator cap has failed. I'd try to replace radiator cap again with one from dealer if that doesn't help you can have a chemical test done which checks for combustion gas in coolant to verify head gasket is leaking. I'll find you a link to buy the test kit yourself if you would like. Let me know if there is anything else I can do to help, thanks.
Customer: replied 1 year ago.
I just got the kit this evening but will have to wait till morning thanks
Expert:  Dan replied 1 year ago.

No problem, sorry about the bad news. Let me know how it turns out. Thanks again and have a good evening.

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