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Re: What could be leaking coolant on the right rear...
Take to a mechanic and have the coolant system pressure tested , that will force the coolant from where the leak is and will be able to see what is leaking , i suspect a split/worn hose
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There could be a few possible causes for the rear heater not blowing hot air in your 2003 Chevrolet ASTRO van. Here are a few things you could check:
Make sure that the rear heater control valve is fully open. This valve is located near the heater core and controls the flow of coolant to the rear heater.
Check the coolant level in the radiator. If the coolant level is low, the heater may not be able to produce hot air.
Check for any leaks in the coolant system. If the system is leaking, it may not have enough coolant to produce hot air.
Check the thermostat. If the thermostat is stuck closed, it may not be allowing enough coolant to flow through the system to produce hot air.
If these steps do not help, it is possible that there is a problem with the heater core itself, or with other components of the heating system. It may be necessary to have a mechanic diagnose and repair the issue.
The Jaguar XK8 has a coolant hose on the rear of the engine that is prone to leaking. The leak is typically on the right side, right above the catalytic converter. There is a quick disconnect fitting that has an o-ring in it. This O-ring fails with age, and the coolant leaks from the connector.
Hi, there are 2 common locations for a coolant leak on a vortec engine. The water pump, and the intake gasket. A coolant pressure test may show the leak better. There is a weep hole , or a vent hole, at the bottom of the water pump. This should be checked, as well as the edgesnof the intake, and the front and rear of the intake. Chances are you will find the problem in these areas. Good luck...Coop
Check the coolant reservoir and the radiator for proper coolant level. If low you probably have a leaking intake gasket or possibly a head gasket leak. The intake leak will be visible on either end of the intake manifold, located at the very top portion of the engine. The head gasket usually shows up at the rear head, nearest the belt. You could have a water pump leaking and this would show coolant on the ground under the right front of the engine, more so when the engine is running. They are very common for all 3 problems.
Does this vehicle have a 3.1 or 3.4L motor. If so they commonly have intake manifold gaskets failures. This leads to coolant leaking, usually at the corners of the intake manifold and in some instances leaking into the oil. Look for signs of coolant leaking at the corners of the intake manifold and check the engine oil for coolant.
V6 2.8L top right rear of engine. Fan also turns on through A/C pressure switch and coolant temperature sensor, but these should operate independent of the coolant temp switch.
V8 5.0L and 5.7L (Heavy Duty) lower right rear of engine above starter.
Base model V8 uses the coolant sensor (top right of engine) and A/C pressure switches (lower right corner of eng compartment on A/C line to turn on the cooling fan. Fan is energized on all applications through the cooling fan relay.
The passenger right side of the car doesn't have any flanges for cooling system, if that's correct then your radiator has a leak or puncture.
The driver side of vehicle has both the in and out flanges for the radiator. Very common to see leak at the drain valve leaking (not closed tightly). In the same area would be bottom flange of radiator which the composite flange is degrading and causing the leak.
The middle part of the bottom engine compartment is where your oil/coolant cooler assembly just above the oil filter. A loose oil filter could be the cause 95% of the time and 5% would be a bad o-ring from the oil cooler to the oil filter flange.
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