If you can get to the connections at the firewall, the easiest way to tell is usually just by disconnecting one momentarily to see if the water is pushed out of the hose or the firewall. It's a good idea to loosen the hose while the engine is cold and turned off, then start the engine and disconnect it. If it is pushed out of the hose, it is the inlet; out of the firewall, it's the outlet. If you do this, just be careful not to let too much coolant escape and to check the coolant level afterward.
This question is a bit confusing. It needs more information. If it involves installing a new heater core, you will really need a good repair manual because this job gets to be quite involved, and is not one that I would recommend for the average do-it-yourselfer. EITHER CONNECT TOGETHER THE HEATER HOSES THAT GO 2 THE HEATER CORE WITH A 1/2OR3/4INCH STRAIGHT PIECE OF PIPE ORCONNECTOR - OR INSTALL 2 BLOCK OFF PLUGS WHERE THE HEATER HOSES USED 2 B CONNECTED ON THE ENGINE.
You don't need to know what hose is which just take them both off and run a pipe from one to the other. You can but bypass kits at the parts store. GoodluckJoe
A type of metric symbol, inlet/outlet
Loosen the clamps and carefully twist the hose where it connects to the heater core. If you are wanting to bypass the heater core, just run one of the hoses between the two places on the motor where they connect or put a short piece of pipe between the two hoses.
The most likely cause is an 'Air Lock' in your heater matrix, probably caused when you changed the thermostat. There are 2 ways of dealing with this; Run the engine, with the heater temperature setting on cold, when your engine reaches normal running temperature, open the heater valve to full. This can work sometimes. For this second method, you need the engine cold: Remove the hose that connects from your cylinder head to your heater and raise it fully. Pour some coolant mixture into the end of the pipe, until it flows from the pipe connection. Reattach the pipe and secure in place. Your heater should now work normally. If it doesn't, you may need to replace the water valve or flush the heater matrix.
It hard to generalise, but.... Generally the inlet pipe comes off fairly close to the thermostat/water pump, and the outlet returnes the water somewhere not near the thermostat/water pump. start the engine and feel the 2 heater core lines the one that starts to get warm first is the inlet. As far as the heater core itself, usually the smaller of the two tubes or the lower one is the inlet. If they are both the same size and are side by side it probably doesn't matter.
replace the water heater inlet pipe on the intake manifold on a 3800
drain coolant. remove heater hoseson the inlet and outlets inside engine compartment passenger side near firewall.remove heater core pipe clamp.remove the glove box.remove insulation below it.remove the evaporator temp sensor wiring clip from the heater core cover. remove heater core cover. remove core clamp then slide the core out carefully.
drain coolant. disconnect the inlet and outlet hoses of the heater core on the engine side of the firewall. (passenger side). remove heater core pipe clamp-bolt and clamp. from inside, remove the glove box(open it, squeeze sides in then pull ouit,remove hinge screws) for access to the upper core cover screw.below the glove boz, remove the dash insullating panel to access lower screw.remove evaporator temp sensor wiring clip from heater core cover if equipped with A/C. remove heater core cover,clamp bolt and clamp then slide out heater core. install is reverse.
This question is a bit confusing. It needs more information. If it involves installing a new heater core, you will really need a good repair manual because this job gets to be quite involved, and is not one that I would recommend for the average do-it-yourselfer. EITHER CONNECT TOGETHER THE HEATER HOSES THAT GO 2 THE HEATER CORE WITH A 1/2OR3/4INCH STRAIGHT PIECE OF PIPE ORCONNECTOR - OR INSTALL 2 BLOCK OFF PLUGS WHERE THE HEATER HOSES USED 2 B CONNECTED ON THE ENGINE.
Heater coolant bypass pipe It would be the return hose for the heater.
A heater hose (rubber) or pipe (steel).
The lowest level of orifice among inlet / outlet connected pipe.
You don't need to know what hose is which just take them both off and run a pipe from one to the other. You can but bypass kits at the parts store. GoodluckJoe
A type of metric symbol, inlet/outlet
The 'inlet' on a muffler refers to the side in which the exhaust gasses from the manifold enter the muffler. The outlet is the side that the gasses exit out to the tail pipe/s.
up your tail pipe