Heater core questions.

[greg_pro50]

I have to replace the heater core in this 2R I just got. I have the dash out and everything apart. I have 2 questions.

Is the factory Ford heater core still available anywhere? I heard to never use an aftermarket one if you dont feel like doing this job again soon but I have also heard that the Ford one is not available.

Also, the heater core was already bypassed. Is there a flow resticter that is supposed to go in the lines? I know the 5.0 cars I have need one but I wasnt sure about these. I know that if one is not installed in the V8 cars the heater core will fail much sooner. If it does need one, which line does it go in?

[roberto2000]

Don't know about the flow restrictor
But the ford ones are around give them a call

[NY eric]

The ford one comes with a little plastic restrictor installed in one of the sides. not sure which one. If you get jammed up on the heater core give me a shout. I will call my supply house.

Eric

[greg_pro50]

Excellent Mike!! That is exactly the info I needed. Alot of people either throw the restrictor out or never put one in to begin with.

[greg_pro50]

Alright, I went to the Ford dealer today and was able to get the factory heater core. It cost me $55. FYI, its the NON-A/C heater core that isnt available.

[Raven855]

Would you post the current part number that is available from ford. Thanks

[85ttops]

i ordered a heater core from one of our vender , can anyone tell me if they come with the restrictor or will there be one in the stock one i take out to swap into the new one

[greg_pro50]

Would you post the current part number that is available from ford. Thanks

E9LY-18476-A

Or at least that is the number on my receipt.

The new core does not come with a restrictor so hopefully your old one will still have it.

[roberto2000]

The core for the non-A/C cars are available I put one in my old 9w

[greg_pro50]

The parts guy must be stupid then or maybe he was putting in the wrong number. For some reason he told me the part number I posted above was the only one that came up as available.

[Raven855]

My F150 had a problem w/ heater cores and Ford had a TSB to check for electrolysis. Here was their remedy:
ISSUE:
Some vehicles may exhibit (repeat) heater core leaks. This may be caused by a chemical reaction called electrolysis. Electrolysis involves an ion exchange between the heater core and engine coolant which can result in a breakdown of the heater core material. This is similar to the operation of a battery.

ACTION:
Check for electrolysis on any vehicle with a heater core failure. If electrolysis is verified, flush the coolant and follow additional steps as required. Refer to the following Service Procedure for details.

SERVICE PROCEDURE:

Electrolysis Inspection:
If there is a condition of a heater core leaking or repeal heater core leak, check for electrolysis using the following procedure:
To check for electrolysis use a DVOM set on DC volts. Place the positive probe of the meter in the engine coolant and the negative probe on the negative battery post.
Adjust engine throttle to 2000 RPM to properly get coolant flow and true electrolysis voltages.
If more than .4V is recorded, flush the coolant and recheck (follow guidelines in TSB 98-23-16 for Cougar). See Coolant Fill Procedure below to remove trapped air on 4.6/5.4/6.8L modular engines.
NOTE: Export markets, be sure the water is desalinated.
If there is still excessive voltage present in the coolant, check the engine to body/battery grounds. Also, verify proper grounding of any aftermarket electrical/electronic equipment which has been installed into the vehicle. Improperly grounded electrical devices can cause electrolysis to occur.
If the condition is still present after the grounds have been checked, it may be necessary to add extra grounds to the heater core and engine. A hose clamp can be used to secure a 16 AWG stranded copper wire to the heater core inlet tube. The other end should be secured to an EXISTING FASTENER on the body sheet metal. Extra grounds to the engine should be attached between EXISTING FASTENERS on the engine and body sheet metal. Verify continuity of any added grounds to the negative battery terminal.
If the condition is still present, add a restrictor (part F1UZ-18D406-A) on the inlet hose with the arrow facing the direction of coolant flow (toward heater core). Cut the line and install with 2 hose clamps. It is important that the restrictor be installed in the right direction of flow and as close to the engine block as possible (not near the heater core itself).

[Pat_in_L.A.]

Raven nailed it.

A multimeter between ground and the coolant will show .2 volts on almost any car. Solder a ground wire to the heater core and run it to chassis ground. This really helps.

Good info, Tony!

[greg_pro50]

I never really thought of the electrolysis impact on the heater core but it really makes sense. I'd bet if you grounded the radiator good that would help make that last longer too. Lotsa great info in this thread.

[NavySVO]

Put a zinc in the radiator as well......
It's the sacrificial lamb.....the cathode/anode thing.

[85ttops]

E1DZ-18D358-A, RESTRICTOR (HEATER CORE COOLANT FLOW), Located inside of 3/4" ID heater core hose inlet hose, 83/

www.greensalescompany.com has ten in stock now. I suspect your local Ford dealer to still stock them also. Plastic - so there's no corrosion or rusting of these.

PART # DOESNT COME UP WITH ANY THING IVE TRIED SEVERAL TIMES AND STILL HAVENT GIVEN ME A PART