To change the heater matrix inlet pipes, first ensure the vehicle is turned off and the engine is cool. Drain the cooling system to prevent spills, then disconnect any components obstructing access to the pipes, such as the dashboard or other interior parts. Remove the old inlet pipes by detaching the clamps and pulling them off, then install the new pipes by securing them with clamps and reconnecting any other components. Finally, refill the cooling system and check for leaks.
The coolant valve to the heater sits above the heater matrix on the inlet pipes. It can be accessed from under the bonnet near the bulkhead below the windscreen.
The heater matrix can be accessed from the front passenger side. Remove the glove box and the flow end return pipes for the heater matrix can be seen. You will need a fairly long T20. Torx driver.
You would have a leak, from either the pipes to the heater matrix (radiator), or the matrix itself.
the heater matrix is blocked
No most certainly not. In most countries this is illegal and you will be prosecuted if found guilty. Always use metallic pipes for hot water, inlet or outlet.
Remove centre consul. Drain cooling system. Remove 2 heater pipes on bulk head under bonnet. Remove matrix cover in car under dash. Pull matrix out. This was on a 2002 model. As they say in the haynes manual..do in reverse to refit !
The heater matrix could be blocked. Best option is to disconnect the two pipes going to the matrix, first finding the flow pipe (put your hand on the pipes to find the hottest one.) Once disconnected, backflush with a garden hose by putting it on the return pipe (the cooler one), and turn on the hose, flushing the matrix. Reconnect the hoses refill system.
Check the heater matrix, and any other heater related pipes that may be leaking. Or it could just be a leaking door seal.
There is two pipes on the right side of the engine bay that connect to the heater matrix itself inside the car, disconnect the two pipes. go inside the car and into the passenger side foot well, unscrew two Philips screws on the heater matrix housing directly behind the centre console once the cover is removed you should be able to have a little play to move the heater matrix in and out, two bolts either side of the gearstick housing should give the housing more room for play and removal is complete.
To remove the external heater pipes on a Peugeot 306, first, ensure the engine is cool and disconnect the battery for safety. Next, locate the heater pipes, typically running from the engine block to the heater matrix; you may need to remove any protective covers. Use a suitable wrench to carefully loosen and detach the pipes from their fittings, ensuring to catch any coolant that may spill. Finally, inspect the O-rings or seals for wear before reassembly or replacement.
Acabin air filter (if fitted) could be blocked. The heater matrix or pipes to it could be furred up. A cooling system flushing treatment might do the trick. Failing that a strip out and cleaning the crud from between the matrix fins might be the answer. If all else fails a new matrix might be required.
There are no "pipes" but vacum lines. However there are a few so more details of the one you are talking about is needed.could be thewater heater inlet pipe on the intake manifold