Question about 1997 Jeep Grand Cherokee

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What are the pipes called that run from the engine to the heater matrix.? Ive got a leak....in one pipe..thanks..

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Heater hoses

Posted on Mar 16, 2011

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Replace heater core in 2001 nissan sentra


1) Drain engine coolant. 2) Remove all cowling under the centre of the dash for access to the matrix.3) Remove two water pipes from matrix.4) Disconnect heater matrix valve cable.5) Remove matrix being careful not to spill water over the ECU.
Reverse instructions for refit.
6) With heater turned to maximum heat, top up cooling system with 50/50 anti freeze/water ratio.
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Firstly before commencing any new work , ensure that you do not have an air lock caused by replacing the previous various parts. Follow the pipe from the thermostat, with engine running and it should heat up when thermostat opens. Follow this pipe towards both the Heater matrix and the carburettor. Both should warm up slowly. Have the heating on inside the car to blow warm. Then feel the exit pipes from the Heater Matrix. The exit pipe should also heat up. If they remain cold the you have an blockage within the Matrix which can either be air or debris. To cure air, let car cool down and remove expansion vessel cap. Then remove exit pipe from heater matrix and hold pipe aas high as possible.....if air is causing the blockage then it will purge itself, when water starts coming out of Matrix, reconnect pipe and top up levels as required. If nothing comes out, the matrix is blocked, may respond to after market flushing treatments or may require removal (pig of a job) Do check before this that oil is not getting into water circuit (dark floating bits if mild, all light brown if bad)or vice a versa (white scum on bottom of dipstick)which would indicate blown head gasket is causing car to overheat!

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Soundls like (REALLY LIKE) a broken heater matrix. You can bypass the matrix by pulling the water pipes from either side and joining them with a piece of copper pipe to stop the leak and make the car useable for the time being. You will have to get a new matrix and fit it or have it fitted if you want a heater tho...
Don't let the engine overheat - you'll turn a slightly pricey job into an enormously expensive and time-consuming job if you let it overheat too much.

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IF ENGINE RUNS AT RIGHT TEMP SOUNDS LIKE YOU MAY HAVE AIR BLOCK, OR BLOCKED HEATER MATRIX, CHECK FIRST CHECK THE HEIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN COULD BE AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS (TWO PIPES GOING FROM ENGINE BAY TO INSIDE OF CAR, AND FLUSH OUT WITH HOSE TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP, YOU CAN BUY A COOLENT FLUSH SOLUTION TO CLEAN THE SYSTYM OUT

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IF ENGINE RUNS AT RIGHT TEMP SOUNDS LIKE YOU MAY HAVE AIR BLOCK, OR BLOCKED HEATER MATRIX, CHECK FIRST CHECK THE HEIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN COULD BE AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS (TWO PIPES GOING FROM ENGINE BAY TO INSIDE OF CAR, AND FLUSH OUT WITH HOSE TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP, YOU CAN BUY A COOLENT FLUSH SOLUTION TO CLEAN THE SYSTYM OUT

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IF ENGINE RUNS AT RIGHT TEMP SOUNDS LIKE YOU MAY HAVE AIR BLOCK, OR BLOCKED HEATER MATRIX, CHECK FIRST CHECK THE HEIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN COULD BE AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS (TWO PIPES GOING FROM ENGINE BAY TO INSIDE OF CAR, AND FLUSH OUT WITH HOSE TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP, YOU CAN BY A COOLENT FLUSH SOLUTION TO CLEAN THE SYSTYM OUT

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1 Answer

Blower works but no heat 98 jeep cheroke


IF ENGINE RUNS AT RIGHT TEMP SOUNDS LIKE YOU MAY HAVE AIR BLOCK, OR BLOCKED HEATER MATRIX, CHECK FIRST CHECK THE HEIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN COULD BE AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS (TWO PIPES GOING FROM ENGINE BAY TO INSIDE OF CAR, AND FLUSH OUT WITH HOSE TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP, YOU CAN BUY A COOLENT FLUSH SOLUTION TO CLEAN THE SYSTYM OUT

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1996 saturn SL heater blows luke warm air, thermostat replaced and no improvement. engine temp is in the normal range. blend door problem?


IF ENGINE RUNS AT RIGHT TEMP SOUNDS LIKE YOU MAY HAVE AIR BLOCK, OR BLOCKED HEATER MATRIX, CHECK FIRST CHECK THE HEIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN COULD BE AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS (TWO PIPES GOING FROM ENGINE BAY TO INSIDE OF CAR, AND FLUSH OUT WITH HOSE TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP, YOU CAN BUY A COOLENT FLUSH SOLUTION TO CLEAN THE SYSTYM OUT

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I have no heat and the front windows will not defrost at all, back is fine, windows fog up all the time. The guage is fine it moves and is in the normal range once the car warms up. I want to go to a...


SOUNDS LIKE YOU MAY HAVE AIR BLOCK, OR BLOCKED HEATER MATRIX, CHECK FIRST CHECK THE HEIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN COULD BE AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS (TWO PIPES GOING FROM ENGINE BAY TO INSIDE OF CAR, AND FLUSH OUT WITH HOSE TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP,
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