I have a 97 Astro van with 4.3 l. It is leaking coolant. I checked the hoses and both are ok. It jhas a new water pump as of last summer and appears not to be leaking from it. As I put coolant into the radiator, it was leaking out right above where the transmission bolts to the motor. This was a leak that got gradually worse up to this point. Any thoughts/ideas that would point me in the right direction would be appreciated. I have been told it might be the hose going to the heater core but not sure of the location.
Your heater core is located under the dash passenger side. Your issue may stem from a loose or broken hose that runs to the back of the intake manifold. Take the engine cover off and examine this hose (passenger side of motor). Check while engine is cold. Fire it up. As it gets hot or pressure builds up you should be able to see your problem. Be careful when you poke around when it is hot. If the hose bursts you will get burned or fluid in your face and eyes.
Do you have a rear seat heater? Check those 2 hoses that run underneath the van from the p side to driver side and into the heater core from underneath the van
February, 1, 2006 AT 8:27 PM
Thanks for the replies. It ended up being a leaking intake manifold gasket. Heater core checked out ok.